./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R --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 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- 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-38b53e6 [2022-11-25 17:43:49,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:43:49,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:43:49,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:43:49,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:43:49,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:43:49,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:43:50,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:43:50,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:43:50,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:43:50,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:43:50,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:43:50,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:43:50,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:43:50,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:43:50,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:43:50,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:43:50,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:43:50,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:43:50,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:43:50,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:43:50,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:43:50,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:43:50,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:43:50,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:43:50,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:43:50,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:43:50,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:43:50,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:43:50,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:43:50,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:43:50,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:43:50,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:43:50,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:43:50,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:43:50,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:43:50,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:43:50,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:43:50,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:43:50,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:43:50,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:43:50,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:43:50,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:43:50,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:43:50,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:43:50,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:43:50,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:43:50,140 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:43:50,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:43:50,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:43:50,142 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:43:50,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:43:50,143 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:43:50,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:43:50,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:43:50,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:43:50,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:43:50,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:43:50,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:43:50,145 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:43:50,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:43:50,146 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:43:50,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:43:50,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:43:50,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:43:50,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:43:50,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:43:50,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:43:50,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:43:50,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:43:50,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:43:50,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:43:50,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:43:50,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:43:50,150 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:43:50,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:43:50,151 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2022-11-25 17:43:50,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:43:50,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:43:50,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:43:50,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:43:50,601 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:43:50,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2022-11-25 17:43:54,189 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:43:54,436 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:43:54,436 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2022-11-25 17:43:54,446 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/data/c0c9f9765/18cb6283e66848c2bc724b238f29e76f/FLAGc68f96f3d [2022-11-25 17:43:54,464 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/data/c0c9f9765/18cb6283e66848c2bc724b238f29e76f [2022-11-25 17:43:54,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:43:54,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:43:54,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:43:54,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:43:54,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:43:54,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:54,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e1c5f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54, skipping insertion in model container [2022-11-25 17:43:54,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:54,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:43:54,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:43:54,834 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_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2022-11-25 17:43:54,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:43:54,871 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:43:54,939 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_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2022-11-25 17:43:54,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:43:54,992 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:43:54,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54 WrapperNode [2022-11-25 17:43:54,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:43:54,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:43:54,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:43:54,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:43:55,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,102 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 297 [2022-11-25 17:43:55,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:43:55,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:43:55,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:43:55,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:43:55,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:43:55,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:43:55,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:43:55,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:43:55,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (1/1) ... [2022-11-25 17:43:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:43:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:55,252 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:43:55,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:43:55,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:43:55,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:43:55,312 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:43:55,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:43:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:43:55,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:43:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:43:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:43:55,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:43:55,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:43:55,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:43:55,319 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:43:55,517 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:43:55,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:43:56,274 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:43:56,291 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:43:56,292 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:43:56,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:56 BoogieIcfgContainer [2022-11-25 17:43:56,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:43:56,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:43:56,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:43:56,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:43:56,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:43:54" (1/3) ... [2022-11-25 17:43:56,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d1d92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:43:56, skipping insertion in model container [2022-11-25 17:43:56,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:54" (2/3) ... [2022-11-25 17:43:56,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d1d92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:43:56, skipping insertion in model container [2022-11-25 17:43:56,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:56" (3/3) ... [2022-11-25 17:43:56,307 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2022-11-25 17:43:56,318 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:43:56,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:43:56,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:43:56,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:43:56,573 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:43:56,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 359 places, 375 transitions, 774 flow [2022-11-25 17:43:56,890 INFO L130 PetriNetUnfolder]: 26/372 cut-off events. [2022-11-25 17:43:56,891 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:43:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 372 events. 26/372 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 884 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-11-25 17:43:56,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 359 places, 375 transitions, 774 flow [2022-11-25 17:43:56,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 361 transitions, 740 flow [2022-11-25 17:43:56,930 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:43:56,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 361 transitions, 740 flow [2022-11-25 17:43:56,955 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 361 transitions, 740 flow [2022-11-25 17:43:56,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 361 transitions, 740 flow [2022-11-25 17:43:57,221 INFO L130 PetriNetUnfolder]: 26/361 cut-off events. [2022-11-25 17:43:57,222 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:43:57,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 361 events. 26/361 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 881 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-11-25 17:43:57,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 34440 [2022-11-25 17:44:16,645 INFO L134 LiptonReduction]: Checked pairs total: 29745 [2022-11-25 17:44:16,645 INFO L136 LiptonReduction]: Total number of compositions: 418 [2022-11-25 17:44:16,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:44:16,729 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;@7f3d6915, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:44:16,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:44:16,742 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-11-25 17:44:16,745 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:44:16,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:16,746 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] [2022-11-25 17:44:16,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1824192461, now seen corresponding path program 1 times [2022-11-25 17:44:16,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812993445] [2022-11-25 17:44:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812993445] [2022-11-25 17:44:17,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812993445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:17,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:17,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:44:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873955795] [2022-11-25 17:44:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:17,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:44:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:44:17,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:44:17,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 793 [2022-11-25 17:44:17,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:17,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:17,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 793 [2022-11-25 17:44:17,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:17,881 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2022-11-25 17:44:17,881 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-25 17:44:17,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 778 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2022-11-25 17:44:17,885 INFO L137 encePairwiseOnDemand]: 790/793 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-11-25 17:44:17,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2022-11-25 17:44:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:44:17,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:44:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1061 transitions. [2022-11-25 17:44:17,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44598570828079026 [2022-11-25 17:44:17,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1061 transitions. [2022-11-25 17:44:17,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1061 transitions. [2022-11-25 17:44:17,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:17,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1061 transitions. [2022-11-25 17:44:17,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:17,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 793.0) internal successors, (3172), 4 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:17,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 793.0) internal successors, (3172), 4 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:17,966 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 1061 transitions. [2022-11-25 17:44:17,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2022-11-25 17:44:17,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:44:17,979 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-11-25 17:44:17,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-11-25 17:44:17,987 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-25 17:44:17,987 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-11-25 17:44:17,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:17,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:17,990 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] [2022-11-25 17:44:17,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:44:17,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash 342028530, now seen corresponding path program 1 times [2022-11-25 17:44:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:18,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186306661] [2022-11-25 17:44:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186306661] [2022-11-25 17:44:18,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186306661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:18,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020852594] [2022-11-25 17:44:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:18,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:18,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:44:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:18,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:44:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:18,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:18,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020852594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:18,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:18,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:44:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997581055] [2022-11-25 17:44:18,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:18,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:44:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:44:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:44:18,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 793 [2022-11-25 17:44:18,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 346.85714285714283) internal successors, (2428), 7 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:18,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:18,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 793 [2022-11-25 17:44:18,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:19,106 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2022-11-25 17:44:19,107 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:44:19,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 779 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2022-11-25 17:44:19,110 INFO L137 encePairwiseOnDemand]: 790/793 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2022-11-25 17:44:19,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2022-11-25 17:44:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:44:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:44:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1744 transitions. [2022-11-25 17:44:19,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4398486759142497 [2022-11-25 17:44:19,118 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1744 transitions. [2022-11-25 17:44:19,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1744 transitions. [2022-11-25 17:44:19,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:19,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1744 transitions. [2022-11-25 17:44:19,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.8) internal successors, (1744), 5 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:19,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 793.0) internal successors, (4758), 6 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:19,140 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 793.0) internal successors, (4758), 6 states have internal predecessors, (4758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:19,141 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1744 transitions. [2022-11-25 17:44:19,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2022-11-25 17:44:19,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:19,143 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2022-11-25 17:44:19,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-11-25 17:44:19,145 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-11-25 17:44:19,145 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2022-11-25 17:44:19,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 346.85714285714283) internal successors, (2428), 7 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:19,147 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:19,148 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:19,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:19,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -10557806, now seen corresponding path program 2 times [2022-11-25 17:44:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:19,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662907331] [2022-11-25 17:44:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:20,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:20,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662907331] [2022-11-25 17:44:20,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662907331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:20,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:20,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:44:20,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980153774] [2022-11-25 17:44:20,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:44:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:44:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:44:21,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 793 [2022-11-25 17:44:21,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:21,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:21,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 793 [2022-11-25 17:44:21,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:21,506 INFO L130 PetriNetUnfolder]: 391/589 cut-off events. [2022-11-25 17:44:21,506 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 17:44:21,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 589 events. 391/589 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1856 event pairs, 138 based on Foata normal form. 1/430 useless extension candidates. Maximal degree in co-relation 1190. Up to 331 conditions per place. [2022-11-25 17:44:21,511 INFO L137 encePairwiseOnDemand]: 786/793 looper letters, 59 selfloop transitions, 5 changer transitions 10/74 dead transitions. [2022-11-25 17:44:21,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 74 transitions, 341 flow [2022-11-25 17:44:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:44:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:44:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1974 transitions. [2022-11-25 17:44:21,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41488020176544765 [2022-11-25 17:44:21,519 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1974 transitions. [2022-11-25 17:44:21,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1974 transitions. [2022-11-25 17:44:21,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:21,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1974 transitions. [2022-11-25 17:44:21,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 329.0) internal successors, (1974), 6 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:21,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:21,570 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:21,570 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 6 states and 1974 transitions. [2022-11-25 17:44:21,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 74 transitions, 341 flow [2022-11-25 17:44:21,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 331 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:21,573 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 116 flow [2022-11-25 17:44:21,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2022-11-25 17:44:21,576 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2022-11-25 17:44:21,576 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 116 flow [2022-11-25 17:44:21,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:21,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:21,578 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:21,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:44:21,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2003772062, now seen corresponding path program 3 times [2022-11-25 17:44:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:21,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497843525] [2022-11-25 17:44:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:22,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497843525] [2022-11-25 17:44:22,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497843525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:22,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:22,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:22,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031406711] [2022-11-25 17:44:22,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:23,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 793 [2022-11-25 17:44:23,341 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 116 flow. Second operand has 8 states, 8 states have (on average 317.625) internal successors, (2541), 8 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:23,341 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:23,341 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 793 [2022-11-25 17:44:23,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:24,125 INFO L130 PetriNetUnfolder]: 739/1133 cut-off events. [2022-11-25 17:44:24,126 INFO L131 PetriNetUnfolder]: For 679/679 co-relation queries the response was YES. [2022-11-25 17:44:24,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3099 conditions, 1133 events. 739/1133 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4440 event pairs, 249 based on Foata normal form. 5/888 useless extension candidates. Maximal degree in co-relation 3072. Up to 566 conditions per place. [2022-11-25 17:44:24,135 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 85 selfloop transitions, 8 changer transitions 8/101 dead transitions. [2022-11-25 17:44:24,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 101 transitions, 573 flow [2022-11-25 17:44:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2288 transitions. [2022-11-25 17:44:24,144 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41217798594847777 [2022-11-25 17:44:24,145 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2288 transitions. [2022-11-25 17:44:24,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2288 transitions. [2022-11-25 17:44:24,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:24,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2288 transitions. [2022-11-25 17:44:24,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:24,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:24,170 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:24,171 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 116 flow. Second operand 7 states and 2288 transitions. [2022-11-25 17:44:24,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 101 transitions, 573 flow [2022-11-25 17:44:24,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 101 transitions, 539 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:24,181 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 184 flow [2022-11-25 17:44:24,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-11-25 17:44:24,184 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2022-11-25 17:44:24,184 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 184 flow [2022-11-25 17:44:24,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 317.625) internal successors, (2541), 8 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:24,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:24,186 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:24,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:44:24,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1832722778, now seen corresponding path program 4 times [2022-11-25 17:44:24,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:24,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256199845] [2022-11-25 17:44:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:24,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:25,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256199845] [2022-11-25 17:44:25,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256199845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:25,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:25,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446106217] [2022-11-25 17:44:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:25,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:25,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:25,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:26,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 793 [2022-11-25 17:44:26,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 319.625) internal successors, (2557), 8 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:26,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:26,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 793 [2022-11-25 17:44:26,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:27,763 INFO L130 PetriNetUnfolder]: 971/1501 cut-off events. [2022-11-25 17:44:27,764 INFO L131 PetriNetUnfolder]: For 1731/1731 co-relation queries the response was YES. [2022-11-25 17:44:27,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 1501 events. 971/1501 cut-off events. For 1731/1731 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6367 event pairs, 286 based on Foata normal form. 1/1250 useless extension candidates. Maximal degree in co-relation 4965. Up to 681 conditions per place. [2022-11-25 17:44:27,777 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 89 selfloop transitions, 15 changer transitions 1/105 dead transitions. [2022-11-25 17:44:27,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 105 transitions, 688 flow [2022-11-25 17:44:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:27,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:27,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2300 transitions. [2022-11-25 17:44:27,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4143397586020537 [2022-11-25 17:44:27,787 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2300 transitions. [2022-11-25 17:44:27,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2300 transitions. [2022-11-25 17:44:27,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:27,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2300 transitions. [2022-11-25 17:44:27,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 328.57142857142856) internal successors, (2300), 7 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:27,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:27,809 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:27,809 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 184 flow. Second operand 7 states and 2300 transitions. [2022-11-25 17:44:27,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 105 transitions, 688 flow [2022-11-25 17:44:27,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 105 transitions, 649 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:27,822 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 311 flow [2022-11-25 17:44:27,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-11-25 17:44:27,823 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2022-11-25 17:44:27,824 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 311 flow [2022-11-25 17:44:27,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 319.625) internal successors, (2557), 8 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:27,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:27,826 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:27,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:44:27,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:27,827 INFO L85 PathProgramCache]: Analyzing trace with hash 520057096, now seen corresponding path program 5 times [2022-11-25 17:44:27,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:27,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054379425] [2022-11-25 17:44:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:27,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:29,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:29,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054379425] [2022-11-25 17:44:29,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054379425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:29,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:29,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:29,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347934694] [2022-11-25 17:44:29,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:29,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:29,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 793 [2022-11-25 17:44:29,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:29,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:29,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 793 [2022-11-25 17:44:29,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:30,924 INFO L130 PetriNetUnfolder]: 1347/2058 cut-off events. [2022-11-25 17:44:30,924 INFO L131 PetriNetUnfolder]: For 4816/4816 co-relation queries the response was YES. [2022-11-25 17:44:30,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8405 conditions, 2058 events. 1347/2058 cut-off events. For 4816/4816 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9291 event pairs, 331 based on Foata normal form. 1/1683 useless extension candidates. Maximal degree in co-relation 8370. Up to 766 conditions per place. [2022-11-25 17:44:30,949 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 117 selfloop transitions, 34 changer transitions 1/152 dead transitions. [2022-11-25 17:44:30,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 152 transitions, 1161 flow [2022-11-25 17:44:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:44:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:44:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3249 transitions. [2022-11-25 17:44:30,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40970996216897854 [2022-11-25 17:44:30,962 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3249 transitions. [2022-11-25 17:44:30,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3249 transitions. [2022-11-25 17:44:30,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:30,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3249 transitions. [2022-11-25 17:44:30,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 324.9) internal successors, (3249), 10 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:31,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 793.0) internal successors, (8723), 11 states have internal predecessors, (8723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:31,015 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 793.0) internal successors, (8723), 11 states have internal predecessors, (8723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:31,015 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 311 flow. Second operand 10 states and 3249 transitions. [2022-11-25 17:44:31,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 152 transitions, 1161 flow [2022-11-25 17:44:31,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 152 transitions, 1128 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:31,038 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 712 flow [2022-11-25 17:44:31,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=712, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2022-11-25 17:44:31,042 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2022-11-25 17:44:31,043 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 712 flow [2022-11-25 17:44:31,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:31,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:31,044 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:31,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:44:31,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1490415456, now seen corresponding path program 6 times [2022-11-25 17:44:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904332656] [2022-11-25 17:44:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:31,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904332656] [2022-11-25 17:44:32,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904332656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:32,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:32,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777388827] [2022-11-25 17:44:32,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:32,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:32,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:32,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 793 [2022-11-25 17:44:32,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 712 flow. Second operand has 8 states, 8 states have (on average 319.625) internal successors, (2557), 8 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:32,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:32,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 793 [2022-11-25 17:44:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:34,131 INFO L130 PetriNetUnfolder]: 1367/2095 cut-off events. [2022-11-25 17:44:34,131 INFO L131 PetriNetUnfolder]: For 9532/9532 co-relation queries the response was YES. [2022-11-25 17:44:34,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10156 conditions, 2095 events. 1367/2095 cut-off events. For 9532/9532 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9413 event pairs, 218 based on Foata normal form. 1/1770 useless extension candidates. Maximal degree in co-relation 10114. Up to 1247 conditions per place. [2022-11-25 17:44:34,161 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 128 selfloop transitions, 25 changer transitions 1/154 dead transitions. [2022-11-25 17:44:34,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 154 transitions, 1614 flow [2022-11-25 17:44:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2290 transitions. [2022-11-25 17:44:34,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4125382813907404 [2022-11-25 17:44:34,173 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2290 transitions. [2022-11-25 17:44:34,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2290 transitions. [2022-11-25 17:44:34,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:34,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2290 transitions. [2022-11-25 17:44:34,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 327.14285714285717) internal successors, (2290), 7 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:34,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:34,200 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:34,200 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 712 flow. Second operand 7 states and 2290 transitions. [2022-11-25 17:44:34,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 154 transitions, 1614 flow [2022-11-25 17:44:34,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 154 transitions, 1422 flow, removed 96 selfloop flow, removed 0 redundant places. [2022-11-25 17:44:34,264 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 815 flow [2022-11-25 17:44:34,264 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2022-11-25 17:44:34,265 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2022-11-25 17:44:34,265 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 815 flow [2022-11-25 17:44:34,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 319.625) internal successors, (2557), 8 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:34,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:34,267 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:34,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:44:34,267 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1614721650, now seen corresponding path program 7 times [2022-11-25 17:44:34,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:34,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862721307] [2022-11-25 17:44:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:34,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:35,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862721307] [2022-11-25 17:44:35,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862721307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:35,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:35,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:44:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880469193] [2022-11-25 17:44:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:35,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:44:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:44:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:44:35,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 793 [2022-11-25 17:44:35,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 815 flow. Second operand has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:35,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:35,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 793 [2022-11-25 17:44:35,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:36,450 INFO L130 PetriNetUnfolder]: 1535/2393 cut-off events. [2022-11-25 17:44:36,451 INFO L131 PetriNetUnfolder]: For 11838/11838 co-relation queries the response was YES. [2022-11-25 17:44:36,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11514 conditions, 2393 events. 1535/2393 cut-off events. For 11838/11838 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11424 event pairs, 301 based on Foata normal form. 4/2071 useless extension candidates. Maximal degree in co-relation 11466. Up to 1076 conditions per place. [2022-11-25 17:44:36,490 INFO L137 encePairwiseOnDemand]: 786/793 looper letters, 130 selfloop transitions, 33 changer transitions 22/185 dead transitions. [2022-11-25 17:44:36,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 185 transitions, 1899 flow [2022-11-25 17:44:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:44:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:44:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1977 transitions. [2022-11-25 17:44:36,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4155107187894073 [2022-11-25 17:44:36,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1977 transitions. [2022-11-25 17:44:36,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1977 transitions. [2022-11-25 17:44:36,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:36,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1977 transitions. [2022-11-25 17:44:36,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 329.5) internal successors, (1977), 6 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:36,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:36,517 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:36,517 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 815 flow. Second operand 6 states and 1977 transitions. [2022-11-25 17:44:36,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 185 transitions, 1899 flow [2022-11-25 17:44:36,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 185 transitions, 1832 flow, removed 29 selfloop flow, removed 1 redundant places. [2022-11-25 17:44:36,583 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 1023 flow [2022-11-25 17:44:36,583 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1023, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2022-11-25 17:44:36,587 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2022-11-25 17:44:36,587 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 1023 flow [2022-11-25 17:44:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:36,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:36,588 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:36,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:44:36,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:36,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:36,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1504675824, now seen corresponding path program 8 times [2022-11-25 17:44:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:36,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725707070] [2022-11-25 17:44:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:36,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725707070] [2022-11-25 17:44:37,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725707070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:37,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:37,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:44:37,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387274373] [2022-11-25 17:44:37,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:37,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:44:37,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:44:37,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:44:37,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 793 [2022-11-25 17:44:37,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 1023 flow. Second operand has 6 states, 6 states have (on average 322.5) internal successors, (1935), 6 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:37,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:37,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 793 [2022-11-25 17:44:37,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:38,757 INFO L130 PetriNetUnfolder]: 1487/2296 cut-off events. [2022-11-25 17:44:38,757 INFO L131 PetriNetUnfolder]: For 16914/16914 co-relation queries the response was YES. [2022-11-25 17:44:38,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12103 conditions, 2296 events. 1487/2296 cut-off events. For 16914/16914 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10676 event pairs, 309 based on Foata normal form. 4/2144 useless extension candidates. Maximal degree in co-relation 12052. Up to 1076 conditions per place. [2022-11-25 17:44:38,799 INFO L137 encePairwiseOnDemand]: 786/793 looper letters, 123 selfloop transitions, 38 changer transitions 16/177 dead transitions. [2022-11-25 17:44:38,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 177 transitions, 1943 flow [2022-11-25 17:44:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:44:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:44:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1985 transitions. [2022-11-25 17:44:38,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4171920975199664 [2022-11-25 17:44:38,808 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1985 transitions. [2022-11-25 17:44:38,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1985 transitions. [2022-11-25 17:44:38,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:38,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1985 transitions. [2022-11-25 17:44:38,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.8333333333333) internal successors, (1985), 6 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,830 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,830 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 1023 flow. Second operand 6 states and 1985 transitions. [2022-11-25 17:44:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 177 transitions, 1943 flow [2022-11-25 17:44:38,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 177 transitions, 1916 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:38,918 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 1191 flow [2022-11-25 17:44:38,918 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2022-11-25 17:44:38,920 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2022-11-25 17:44:38,920 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 1191 flow [2022-11-25 17:44:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 322.5) internal successors, (1935), 6 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:38,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:38,922 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:38,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:44:38,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash -16145242, now seen corresponding path program 9 times [2022-11-25 17:44:38,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:38,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629975188] [2022-11-25 17:44:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:38,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:40,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:40,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629975188] [2022-11-25 17:44:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629975188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:40,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:40,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:44:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417583800] [2022-11-25 17:44:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:44:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:44:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:44:41,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 793 [2022-11-25 17:44:41,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 1191 flow. Second operand has 9 states, 9 states have (on average 310.3333333333333) internal successors, (2793), 9 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:41,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:41,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 793 [2022-11-25 17:44:41,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:42,738 INFO L130 PetriNetUnfolder]: 1871/2871 cut-off events. [2022-11-25 17:44:42,738 INFO L131 PetriNetUnfolder]: For 28302/28302 co-relation queries the response was YES. [2022-11-25 17:44:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16081 conditions, 2871 events. 1871/2871 cut-off events. For 28302/28302 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14005 event pairs, 448 based on Foata normal form. 5/2660 useless extension candidates. Maximal degree in co-relation 16028. Up to 1654 conditions per place. [2022-11-25 17:44:42,779 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 127 selfloop transitions, 54 changer transitions 10/191 dead transitions. [2022-11-25 17:44:42,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 191 transitions, 2252 flow [2022-11-25 17:44:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:44:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:44:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2539 transitions. [2022-11-25 17:44:42,790 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40022068095838587 [2022-11-25 17:44:42,791 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2539 transitions. [2022-11-25 17:44:42,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2539 transitions. [2022-11-25 17:44:42,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:42,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2539 transitions. [2022-11-25 17:44:42,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 317.375) internal successors, (2539), 8 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 793.0) internal successors, (7137), 9 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,812 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 793.0) internal successors, (7137), 9 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,813 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 1191 flow. Second operand 8 states and 2539 transitions. [2022-11-25 17:44:42,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 191 transitions, 2252 flow [2022-11-25 17:44:42,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 191 transitions, 2158 flow, removed 15 selfloop flow, removed 3 redundant places. [2022-11-25 17:44:42,899 INFO L231 Difference]: Finished difference. Result has 102 places, 121 transitions, 1481 flow [2022-11-25 17:44:42,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1481, PETRI_PLACES=102, PETRI_TRANSITIONS=121} [2022-11-25 17:44:42,903 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2022-11-25 17:44:42,903 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 121 transitions, 1481 flow [2022-11-25 17:44:42,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 310.3333333333333) internal successors, (2793), 9 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:42,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:42,905 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:42,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:44:42,906 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash 969612476, now seen corresponding path program 10 times [2022-11-25 17:44:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814307710] [2022-11-25 17:44:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:43,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814307710] [2022-11-25 17:44:43,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814307710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:43,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:43,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:43,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965687755] [2022-11-25 17:44:43,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:43,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:43,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:44,229 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 793 [2022-11-25 17:44:44,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 121 transitions, 1481 flow. Second operand has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:44,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:44,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 793 [2022-11-25 17:44:44,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:45,768 INFO L130 PetriNetUnfolder]: 1972/3040 cut-off events. [2022-11-25 17:44:45,769 INFO L131 PetriNetUnfolder]: For 36424/36424 co-relation queries the response was YES. [2022-11-25 17:44:45,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18490 conditions, 3040 events. 1972/3040 cut-off events. For 36424/36424 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 15137 event pairs, 490 based on Foata normal form. 14/2838 useless extension candidates. Maximal degree in co-relation 18432. Up to 1161 conditions per place. [2022-11-25 17:44:45,815 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 176 selfloop transitions, 21 changer transitions 9/206 dead transitions. [2022-11-25 17:44:45,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 206 transitions, 2714 flow [2022-11-25 17:44:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2280 transitions. [2022-11-25 17:44:45,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41073680417942715 [2022-11-25 17:44:45,823 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2280 transitions. [2022-11-25 17:44:45,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2280 transitions. [2022-11-25 17:44:45,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:45,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2280 transitions. [2022-11-25 17:44:45,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 325.7142857142857) internal successors, (2280), 7 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,847 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,847 INFO L175 Difference]: Start difference. First operand has 102 places, 121 transitions, 1481 flow. Second operand 7 states and 2280 transitions. [2022-11-25 17:44:45,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 206 transitions, 2714 flow [2022-11-25 17:44:45,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 206 transitions, 2576 flow, removed 48 selfloop flow, removed 3 redundant places. [2022-11-25 17:44:45,991 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 1490 flow [2022-11-25 17:44:45,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1490, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2022-11-25 17:44:45,992 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2022-11-25 17:44:45,992 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 1490 flow [2022-11-25 17:44:45,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:45,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:45,996 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:45,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:44:45,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash -593911948, now seen corresponding path program 11 times [2022-11-25 17:44:45,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:45,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66499955] [2022-11-25 17:44:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:47,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:47,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66499955] [2022-11-25 17:44:47,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66499955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:47,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:47,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:47,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024470233] [2022-11-25 17:44:47,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:47,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:47,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 793 [2022-11-25 17:44:47,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 1490 flow. Second operand has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:47,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:47,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 793 [2022-11-25 17:44:47,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:49,675 INFO L130 PetriNetUnfolder]: 2360/3652 cut-off events. [2022-11-25 17:44:49,675 INFO L131 PetriNetUnfolder]: For 42332/42332 co-relation queries the response was YES. [2022-11-25 17:44:49,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21441 conditions, 3652 events. 2360/3652 cut-off events. For 42332/42332 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18942 event pairs, 566 based on Foata normal form. 2/3354 useless extension candidates. Maximal degree in co-relation 21382. Up to 1909 conditions per place. [2022-11-25 17:44:49,726 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 154 selfloop transitions, 60 changer transitions 3/217 dead transitions. [2022-11-25 17:44:49,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 217 transitions, 2810 flow [2022-11-25 17:44:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2284 transitions. [2022-11-25 17:44:49,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41145739506395246 [2022-11-25 17:44:49,737 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2284 transitions. [2022-11-25 17:44:49,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2284 transitions. [2022-11-25 17:44:49,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:49,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2284 transitions. [2022-11-25 17:44:49,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 326.2857142857143) internal successors, (2284), 7 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:49,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:49,755 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:49,756 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 1490 flow. Second operand 7 states and 2284 transitions. [2022-11-25 17:44:49,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 217 transitions, 2810 flow [2022-11-25 17:44:49,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 2690 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-25 17:44:49,925 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1966 flow [2022-11-25 17:44:49,926 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1966, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2022-11-25 17:44:49,926 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2022-11-25 17:44:49,926 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1966 flow [2022-11-25 17:44:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:49,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:49,928 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:44:49,928 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 1 more)] === [2022-11-25 17:44:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 722885616, now seen corresponding path program 12 times [2022-11-25 17:44:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:49,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028370617] [2022-11-25 17:44:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:50,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:50,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028370617] [2022-11-25 17:44:50,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028370617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:50,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:50,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:44:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036466121] [2022-11-25 17:44:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:44:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:44:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:44:50,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 793 [2022-11-25 17:44:50,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1966 flow. Second operand has 6 states, 6 states have (on average 323.5) internal successors, (1941), 6 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:50,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:50,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 793 [2022-11-25 17:44:50,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:52,355 INFO L130 PetriNetUnfolder]: 2431/3788 cut-off events. [2022-11-25 17:44:52,355 INFO L131 PetriNetUnfolder]: For 52098/52098 co-relation queries the response was YES. [2022-11-25 17:44:52,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23754 conditions, 3788 events. 2431/3788 cut-off events. For 52098/52098 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 20176 event pairs, 550 based on Foata normal form. 5/3489 useless extension candidates. Maximal degree in co-relation 23690. Up to 1909 conditions per place. [2022-11-25 17:44:52,403 INFO L137 encePairwiseOnDemand]: 786/793 looper letters, 139 selfloop transitions, 59 changer transitions 19/217 dead transitions. [2022-11-25 17:44:52,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 217 transitions, 3076 flow [2022-11-25 17:44:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:44:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:44:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1988 transitions. [2022-11-25 17:44:52,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.417822614543926 [2022-11-25 17:44:52,409 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1988 transitions. [2022-11-25 17:44:52,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1988 transitions. [2022-11-25 17:44:52,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:52,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1988 transitions. [2022-11-25 17:44:52,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 331.3333333333333) internal successors, (1988), 6 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:52,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:52,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:52,425 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1966 flow. Second operand 6 states and 1988 transitions. [2022-11-25 17:44:52,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 217 transitions, 3076 flow [2022-11-25 17:44:52,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 217 transitions, 2972 flow, removed 32 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:52,652 INFO L231 Difference]: Finished difference. Result has 120 places, 148 transitions, 2091 flow [2022-11-25 17:44:52,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2091, PETRI_PLACES=120, PETRI_TRANSITIONS=148} [2022-11-25 17:44:52,654 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2022-11-25 17:44:52,654 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 148 transitions, 2091 flow [2022-11-25 17:44:52,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 323.5) internal successors, (1941), 6 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:52,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:52,655 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:52,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:44:52,656 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 1 more)] === [2022-11-25 17:44:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1180745514, now seen corresponding path program 13 times [2022-11-25 17:44:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:52,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302326498] [2022-11-25 17:44:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:52,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:53,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302326498] [2022-11-25 17:44:53,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302326498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:53,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:53,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380794336] [2022-11-25 17:44:53,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:53,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:53,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:53,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:53,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:54,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 793 [2022-11-25 17:44:54,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 148 transitions, 2091 flow. Second operand has 8 states, 8 states have (on average 318.625) internal successors, (2549), 8 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:54,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:54,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 793 [2022-11-25 17:44:54,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:55,884 INFO L130 PetriNetUnfolder]: 2420/3781 cut-off events. [2022-11-25 17:44:55,884 INFO L131 PetriNetUnfolder]: For 55313/55313 co-relation queries the response was YES. [2022-11-25 17:44:55,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23605 conditions, 3781 events. 2420/3781 cut-off events. For 55313/55313 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20117 event pairs, 661 based on Foata normal form. 2/3467 useless extension candidates. Maximal degree in co-relation 23539. Up to 1833 conditions per place. [2022-11-25 17:44:55,925 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 166 selfloop transitions, 63 changer transitions 3/232 dead transitions. [2022-11-25 17:44:55,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 3322 flow [2022-11-25 17:44:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2302 transitions. [2022-11-25 17:44:55,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4147000540443163 [2022-11-25 17:44:55,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2302 transitions. [2022-11-25 17:44:55,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2302 transitions. [2022-11-25 17:44:55,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:55,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2302 transitions. [2022-11-25 17:44:55,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 328.85714285714283) internal successors, (2302), 7 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,949 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,949 INFO L175 Difference]: Start difference. First operand has 120 places, 148 transitions, 2091 flow. Second operand 7 states and 2302 transitions. [2022-11-25 17:44:55,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 3322 flow [2022-11-25 17:44:56,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 232 transitions, 3181 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-11-25 17:44:56,182 INFO L231 Difference]: Finished difference. Result has 125 places, 165 transitions, 2450 flow [2022-11-25 17:44:56,183 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2450, PETRI_PLACES=125, PETRI_TRANSITIONS=165} [2022-11-25 17:44:56,184 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2022-11-25 17:44:56,184 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 165 transitions, 2450 flow [2022-11-25 17:44:56,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 318.625) internal successors, (2549), 8 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:56,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:56,185 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:56,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:44:56,187 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 1 more)] === [2022-11-25 17:44:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1031306982, now seen corresponding path program 14 times [2022-11-25 17:44:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398259176] [2022-11-25 17:44:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:44:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398259176] [2022-11-25 17:44:57,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398259176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:57,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:57,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:44:57,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320401532] [2022-11-25 17:44:57,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:57,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:57,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 793 [2022-11-25 17:44:57,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 165 transitions, 2450 flow. Second operand has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:57,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:57,824 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 793 [2022-11-25 17:44:57,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:59,119 INFO L130 PetriNetUnfolder]: 2485/3904 cut-off events. [2022-11-25 17:44:59,120 INFO L131 PetriNetUnfolder]: For 61485/61485 co-relation queries the response was YES. [2022-11-25 17:44:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26056 conditions, 3904 events. 2485/3904 cut-off events. For 61485/61485 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21063 event pairs, 576 based on Foata normal form. 6/3586 useless extension candidates. Maximal degree in co-relation 25988. Up to 1929 conditions per place. [2022-11-25 17:44:59,163 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 167 selfloop transitions, 70 changer transitions 9/246 dead transitions. [2022-11-25 17:44:59,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 246 transitions, 3930 flow [2022-11-25 17:44:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:44:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:44:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2277 transitions. [2022-11-25 17:44:59,170 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41019636101603313 [2022-11-25 17:44:59,171 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2277 transitions. [2022-11-25 17:44:59,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2277 transitions. [2022-11-25 17:44:59,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:59,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2277 transitions. [2022-11-25 17:44:59,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:59,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:59,186 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:59,186 INFO L175 Difference]: Start difference. First operand has 125 places, 165 transitions, 2450 flow. Second operand 7 states and 2277 transitions. [2022-11-25 17:44:59,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 246 transitions, 3930 flow [2022-11-25 17:44:59,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 246 transitions, 3792 flow, removed 35 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:59,440 INFO L231 Difference]: Finished difference. Result has 134 places, 182 transitions, 2874 flow [2022-11-25 17:44:59,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2874, PETRI_PLACES=134, PETRI_TRANSITIONS=182} [2022-11-25 17:44:59,441 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2022-11-25 17:44:59,442 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 182 transitions, 2874 flow [2022-11-25 17:44:59,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 316.625) internal successors, (2533), 8 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:59,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:59,443 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:59,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:44:59,443 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:44:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash -262871740, now seen corresponding path program 15 times [2022-11-25 17:44:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:59,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391127790] [2022-11-25 17:44:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:59,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:00,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391127790] [2022-11-25 17:45:00,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391127790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:00,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:00,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:00,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212332163] [2022-11-25 17:45:00,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:00,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:45:00,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:45:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:45:01,236 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 793 [2022-11-25 17:45:01,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 182 transitions, 2874 flow. Second operand has 8 states, 8 states have (on average 318.625) internal successors, (2549), 8 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:01,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:01,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 793 [2022-11-25 17:45:01,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:02,962 INFO L130 PetriNetUnfolder]: 2504/3953 cut-off events. [2022-11-25 17:45:02,962 INFO L131 PetriNetUnfolder]: For 66532/66532 co-relation queries the response was YES. [2022-11-25 17:45:02,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27205 conditions, 3953 events. 2504/3953 cut-off events. For 66532/66532 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21595 event pairs, 647 based on Foata normal form. 2/3825 useless extension candidates. Maximal degree in co-relation 27132. Up to 1920 conditions per place. [2022-11-25 17:45:02,999 INFO L137 encePairwiseOnDemand]: 783/793 looper letters, 196 selfloop transitions, 60 changer transitions 3/259 dead transitions. [2022-11-25 17:45:02,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 259 transitions, 4114 flow [2022-11-25 17:45:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2302 transitions. [2022-11-25 17:45:03,008 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4147000540443163 [2022-11-25 17:45:03,008 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2302 transitions. [2022-11-25 17:45:03,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2302 transitions. [2022-11-25 17:45:03,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:03,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2302 transitions. [2022-11-25 17:45:03,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 328.85714285714283) internal successors, (2302), 7 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:03,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:03,023 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:03,023 INFO L175 Difference]: Start difference. First operand has 134 places, 182 transitions, 2874 flow. Second operand 7 states and 2302 transitions. [2022-11-25 17:45:03,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 259 transitions, 4114 flow [2022-11-25 17:45:03,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 259 transitions, 4001 flow, removed 32 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:03,316 INFO L231 Difference]: Finished difference. Result has 140 places, 189 transitions, 3042 flow [2022-11-25 17:45:03,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3042, PETRI_PLACES=140, PETRI_TRANSITIONS=189} [2022-11-25 17:45:03,317 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2022-11-25 17:45:03,317 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 189 transitions, 3042 flow [2022-11-25 17:45:03,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 318.625) internal successors, (2549), 8 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:03,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:03,318 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:03,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 17:45:03,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash 982225040, now seen corresponding path program 16 times [2022-11-25 17:45:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:03,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150116952] [2022-11-25 17:45:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:04,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:04,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150116952] [2022-11-25 17:45:04,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150116952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:04,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:04,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:45:04,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922229850] [2022-11-25 17:45:04,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:04,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:45:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:45:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:45:04,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 793 [2022-11-25 17:45:04,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 189 transitions, 3042 flow. Second operand has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:04,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:04,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 793 [2022-11-25 17:45:04,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:05,816 INFO L130 PetriNetUnfolder]: 2511/3997 cut-off events. [2022-11-25 17:45:05,816 INFO L131 PetriNetUnfolder]: For 64466/64466 co-relation queries the response was YES. [2022-11-25 17:45:05,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27270 conditions, 3997 events. 2511/3997 cut-off events. For 64466/64466 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22115 event pairs, 640 based on Foata normal form. 4/3663 useless extension candidates. Maximal degree in co-relation 27195. Up to 1939 conditions per place. [2022-11-25 17:45:05,852 INFO L137 encePairwiseOnDemand]: 786/793 looper letters, 168 selfloop transitions, 91 changer transitions 25/284 dead transitions. [2022-11-25 17:45:05,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 284 transitions, 4857 flow [2022-11-25 17:45:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:45:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:45:05,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1973 transitions. [2022-11-25 17:45:05,857 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4146700294241278 [2022-11-25 17:45:05,857 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1973 transitions. [2022-11-25 17:45:05,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1973 transitions. [2022-11-25 17:45:05,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:05,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1973 transitions. [2022-11-25 17:45:05,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.8333333333333) internal successors, (1973), 6 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:05,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:05,869 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:05,869 INFO L175 Difference]: Start difference. First operand has 140 places, 189 transitions, 3042 flow. Second operand 6 states and 1973 transitions. [2022-11-25 17:45:05,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 284 transitions, 4857 flow [2022-11-25 17:45:06,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 284 transitions, 4707 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-25 17:45:06,113 INFO L231 Difference]: Finished difference. Result has 145 places, 206 transitions, 3483 flow [2022-11-25 17:45:06,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3483, PETRI_PLACES=145, PETRI_TRANSITIONS=206} [2022-11-25 17:45:06,114 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2022-11-25 17:45:06,114 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 206 transitions, 3483 flow [2022-11-25 17:45:06,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:06,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:06,115 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:06,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:45:06,116 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash -405341060, now seen corresponding path program 17 times [2022-11-25 17:45:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:06,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889495606] [2022-11-25 17:45:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:06,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:06,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889495606] [2022-11-25 17:45:06,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889495606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:06,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:06,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:45:06,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001530800] [2022-11-25 17:45:06,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:06,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:45:06,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:06,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:45:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:45:07,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 793 [2022-11-25 17:45:07,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 206 transitions, 3483 flow. Second operand has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:07,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:07,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 793 [2022-11-25 17:45:07,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:08,457 INFO L130 PetriNetUnfolder]: 2456/3875 cut-off events. [2022-11-25 17:45:08,457 INFO L131 PetriNetUnfolder]: For 68108/68108 co-relation queries the response was YES. [2022-11-25 17:45:08,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27154 conditions, 3875 events. 2456/3875 cut-off events. For 68108/68108 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21057 event pairs, 602 based on Foata normal form. 6/3545 useless extension candidates. Maximal degree in co-relation 27076. Up to 1939 conditions per place. [2022-11-25 17:45:08,492 INFO L137 encePairwiseOnDemand]: 786/793 looper letters, 156 selfloop transitions, 93 changer transitions 23/272 dead transitions. [2022-11-25 17:45:08,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 272 transitions, 4772 flow [2022-11-25 17:45:08,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:45:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:45:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1971 transitions. [2022-11-25 17:45:08,495 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41424968474148804 [2022-11-25 17:45:08,495 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1971 transitions. [2022-11-25 17:45:08,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1971 transitions. [2022-11-25 17:45:08,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:08,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1971 transitions. [2022-11-25 17:45:08,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 328.5) internal successors, (1971), 6 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:08,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:08,503 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 793.0) internal successors, (5551), 7 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:08,503 INFO L175 Difference]: Start difference. First operand has 145 places, 206 transitions, 3483 flow. Second operand 6 states and 1971 transitions. [2022-11-25 17:45:08,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 272 transitions, 4772 flow [2022-11-25 17:45:08,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 272 transitions, 4650 flow, removed 28 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:08,759 INFO L231 Difference]: Finished difference. Result has 150 places, 207 transitions, 3654 flow [2022-11-25 17:45:08,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=3367, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3654, PETRI_PLACES=150, PETRI_TRANSITIONS=207} [2022-11-25 17:45:08,760 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2022-11-25 17:45:08,760 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 207 transitions, 3654 flow [2022-11-25 17:45:08,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 320.5) internal successors, (1923), 6 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:08,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:08,761 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:45:08,761 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -75646834, now seen corresponding path program 1 times [2022-11-25 17:45:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560295014] [2022-11-25 17:45:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:09,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:09,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560295014] [2022-11-25 17:45:09,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560295014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:09,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:09,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:45:09,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055005363] [2022-11-25 17:45:09,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:09,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:45:09,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:09,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:45:09,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:45:09,682 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:45:09,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 207 transitions, 3654 flow. Second operand has 8 states, 8 states have (on average 328.75) internal successors, (2630), 8 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:09,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:09,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:45:09,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:11,284 INFO L130 PetriNetUnfolder]: 2708/4266 cut-off events. [2022-11-25 17:45:11,284 INFO L131 PetriNetUnfolder]: For 75728/75728 co-relation queries the response was YES. [2022-11-25 17:45:11,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29922 conditions, 4266 events. 2708/4266 cut-off events. For 75728/75728 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23482 event pairs, 560 based on Foata normal form. 10/3904 useless extension candidates. Maximal degree in co-relation 29842. Up to 1592 conditions per place. [2022-11-25 17:45:11,330 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 268 selfloop transitions, 58 changer transitions 0/326 dead transitions. [2022-11-25 17:45:11,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 326 transitions, 5857 flow [2022-11-25 17:45:11,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:11,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2373 transitions. [2022-11-25 17:45:11,335 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4274905422446406 [2022-11-25 17:45:11,335 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2373 transitions. [2022-11-25 17:45:11,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2373 transitions. [2022-11-25 17:45:11,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:11,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2373 transitions. [2022-11-25 17:45:11,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:11,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:11,345 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:11,345 INFO L175 Difference]: Start difference. First operand has 150 places, 207 transitions, 3654 flow. Second operand 7 states and 2373 transitions. [2022-11-25 17:45:11,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 326 transitions, 5857 flow [2022-11-25 17:45:11,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 326 transitions, 5667 flow, removed 58 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:11,688 INFO L231 Difference]: Finished difference. Result has 157 places, 219 transitions, 3914 flow [2022-11-25 17:45:11,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3914, PETRI_PLACES=157, PETRI_TRANSITIONS=219} [2022-11-25 17:45:11,689 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2022-11-25 17:45:11,689 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 219 transitions, 3914 flow [2022-11-25 17:45:11,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 328.75) internal successors, (2630), 8 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:11,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:11,690 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:45:11,690 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1943912796, now seen corresponding path program 2 times [2022-11-25 17:45:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8825159] [2022-11-25 17:45:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:12,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:12,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8825159] [2022-11-25 17:45:12,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8825159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:12,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:12,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387150015] [2022-11-25 17:45:12,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:12,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:12,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:12,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:45:12,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 219 transitions, 3914 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:12,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:12,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:45:12,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:14,067 INFO L130 PetriNetUnfolder]: 3106/4891 cut-off events. [2022-11-25 17:45:14,068 INFO L131 PetriNetUnfolder]: For 87145/87145 co-relation queries the response was YES. [2022-11-25 17:45:14,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34493 conditions, 4891 events. 3106/4891 cut-off events. For 87145/87145 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27559 event pairs, 409 based on Foata normal form. 10/4439 useless extension candidates. Maximal degree in co-relation 34410. Up to 2145 conditions per place. [2022-11-25 17:45:14,113 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 291 selfloop transitions, 60 changer transitions 2/353 dead transitions. [2022-11-25 17:45:14,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 353 transitions, 6503 flow [2022-11-25 17:45:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2367 transitions. [2022-11-25 17:45:14,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264096559178526 [2022-11-25 17:45:14,118 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2367 transitions. [2022-11-25 17:45:14,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2367 transitions. [2022-11-25 17:45:14,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:14,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2367 transitions. [2022-11-25 17:45:14,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 338.14285714285717) internal successors, (2367), 7 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,130 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,131 INFO L175 Difference]: Start difference. First operand has 157 places, 219 transitions, 3914 flow. Second operand 7 states and 2367 transitions. [2022-11-25 17:45:14,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 353 transitions, 6503 flow [2022-11-25 17:45:14,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 353 transitions, 6350 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:14,548 INFO L231 Difference]: Finished difference. Result has 165 places, 238 transitions, 4406 flow [2022-11-25 17:45:14,549 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4406, PETRI_PLACES=165, PETRI_TRANSITIONS=238} [2022-11-25 17:45:14,549 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2022-11-25 17:45:14,549 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 238 transitions, 4406 flow [2022-11-25 17:45:14,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:14,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:14,550 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:14,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 17:45:14,550 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:14,551 INFO L85 PathProgramCache]: Analyzing trace with hash 283192849, now seen corresponding path program 1 times [2022-11-25 17:45:14,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:14,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280136667] [2022-11-25 17:45:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:14,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:15,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280136667] [2022-11-25 17:45:15,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280136667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:15,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:15,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:15,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293546939] [2022-11-25 17:45:15,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:15,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:15,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:15,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:45:15,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 238 transitions, 4406 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:15,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:15,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:45:15,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:17,025 INFO L130 PetriNetUnfolder]: 3090/4861 cut-off events. [2022-11-25 17:45:17,025 INFO L131 PetriNetUnfolder]: For 95369/95369 co-relation queries the response was YES. [2022-11-25 17:45:17,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34898 conditions, 4861 events. 3090/4861 cut-off events. For 95369/95369 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27237 event pairs, 668 based on Foata normal form. 6/4405 useless extension candidates. Maximal degree in co-relation 34811. Up to 2579 conditions per place. [2022-11-25 17:45:17,084 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 246 selfloop transitions, 79 changer transitions 9/334 dead transitions. [2022-11-25 17:45:17,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 334 transitions, 6337 flow [2022-11-25 17:45:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2364 transitions. [2022-11-25 17:45:17,089 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42586921275445866 [2022-11-25 17:45:17,089 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2364 transitions. [2022-11-25 17:45:17,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2364 transitions. [2022-11-25 17:45:17,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:17,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2364 transitions. [2022-11-25 17:45:17,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.7142857142857) internal successors, (2364), 7 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:17,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:17,102 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:17,103 INFO L175 Difference]: Start difference. First operand has 165 places, 238 transitions, 4406 flow. Second operand 7 states and 2364 transitions. [2022-11-25 17:45:17,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 334 transitions, 6337 flow [2022-11-25 17:45:17,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 334 transitions, 6231 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:17,549 INFO L231 Difference]: Finished difference. Result has 172 places, 242 transitions, 4609 flow [2022-11-25 17:45:17,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=4324, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4609, PETRI_PLACES=172, PETRI_TRANSITIONS=242} [2022-11-25 17:45:17,550 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2022-11-25 17:45:17,550 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 242 transitions, 4609 flow [2022-11-25 17:45:17,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:17,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:17,551 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 17:45:17,551 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1927522759, now seen corresponding path program 2 times [2022-11-25 17:45:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826126329] [2022-11-25 17:45:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:18,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:18,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826126329] [2022-11-25 17:45:18,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826126329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:18,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:18,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:18,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846784437] [2022-11-25 17:45:18,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:18,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:18,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:45:18,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 242 transitions, 4609 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:18,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:18,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:45:18,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:19,921 INFO L130 PetriNetUnfolder]: 3086/4847 cut-off events. [2022-11-25 17:45:19,921 INFO L131 PetriNetUnfolder]: For 94257/94257 co-relation queries the response was YES. [2022-11-25 17:45:19,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35540 conditions, 4847 events. 3086/4847 cut-off events. For 94257/94257 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27048 event pairs, 879 based on Foata normal form. 4/4389 useless extension candidates. Maximal degree in co-relation 35450. Up to 3042 conditions per place. [2022-11-25 17:45:19,970 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 272 selfloop transitions, 63 changer transitions 0/335 dead transitions. [2022-11-25 17:45:19,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 335 transitions, 6372 flow [2022-11-25 17:45:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2360 transitions. [2022-11-25 17:45:19,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42514862186993335 [2022-11-25 17:45:19,974 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2360 transitions. [2022-11-25 17:45:19,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2360 transitions. [2022-11-25 17:45:19,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:19,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2360 transitions. [2022-11-25 17:45:19,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.14285714285717) internal successors, (2360), 7 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:19,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:19,981 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:19,981 INFO L175 Difference]: Start difference. First operand has 172 places, 242 transitions, 4609 flow. Second operand 7 states and 2360 transitions. [2022-11-25 17:45:19,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 335 transitions, 6372 flow [2022-11-25 17:45:20,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 335 transitions, 6120 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-11-25 17:45:20,397 INFO L231 Difference]: Finished difference. Result has 173 places, 244 transitions, 4611 flow [2022-11-25 17:45:20,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4611, PETRI_PLACES=173, PETRI_TRANSITIONS=244} [2022-11-25 17:45:20,398 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2022-11-25 17:45:20,399 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 244 transitions, 4611 flow [2022-11-25 17:45:20,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:20,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:20,399 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:20,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 17:45:20,400 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:20,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1643369090, now seen corresponding path program 3 times [2022-11-25 17:45:20,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:20,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294405323] [2022-11-25 17:45:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:20,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:20,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294405323] [2022-11-25 17:45:20,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294405323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:20,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106325070] [2022-11-25 17:45:20,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:45:20,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:20,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:20,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:20,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:45:21,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:45:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:21,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:45:21,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:21,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:22,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106325070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:22,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-11-25 17:45:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759121059] [2022-11-25 17:45:22,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:22,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:45:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:45:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:45:23,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 793 [2022-11-25 17:45:23,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 244 transitions, 4611 flow. Second operand has 18 states, 18 states have (on average 312.94444444444446) internal successors, (5633), 18 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:23,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:23,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 793 [2022-11-25 17:45:23,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:26,212 INFO L130 PetriNetUnfolder]: 3923/6187 cut-off events. [2022-11-25 17:45:26,212 INFO L131 PetriNetUnfolder]: For 123071/123071 co-relation queries the response was YES. [2022-11-25 17:45:26,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45031 conditions, 6187 events. 3923/6187 cut-off events. For 123071/123071 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 36446 event pairs, 896 based on Foata normal form. 10/5619 useless extension candidates. Maximal degree in co-relation 44941. Up to 2203 conditions per place. [2022-11-25 17:45:26,281 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 298 selfloop transitions, 94 changer transitions 0/392 dead transitions. [2022-11-25 17:45:26,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 392 transitions, 7639 flow [2022-11-25 17:45:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2268 transitions. [2022-11-25 17:45:26,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4085750315258512 [2022-11-25 17:45:26,285 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2268 transitions. [2022-11-25 17:45:26,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2268 transitions. [2022-11-25 17:45:26,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:26,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2268 transitions. [2022-11-25 17:45:26,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:26,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:26,292 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:26,292 INFO L175 Difference]: Start difference. First operand has 173 places, 244 transitions, 4611 flow. Second operand 7 states and 2268 transitions. [2022-11-25 17:45:26,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 392 transitions, 7639 flow [2022-11-25 17:45:26,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 392 transitions, 7427 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 17:45:26,824 INFO L231 Difference]: Finished difference. Result has 180 places, 274 transitions, 5432 flow [2022-11-25 17:45:26,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5432, PETRI_PLACES=180, PETRI_TRANSITIONS=274} [2022-11-25 17:45:26,825 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2022-11-25 17:45:26,825 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 274 transitions, 5432 flow [2022-11-25 17:45:26,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 312.94444444444446) internal successors, (5633), 18 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:26,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:26,826 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:26,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:27,027 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1162535101, now seen corresponding path program 3 times [2022-11-25 17:45:27,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:27,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655257680] [2022-11-25 17:45:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:27,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:27,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:27,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655257680] [2022-11-25 17:45:27,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655257680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:27,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:27,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:27,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066490663] [2022-11-25 17:45:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:27,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:27,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:45:27,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 274 transitions, 5432 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:27,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:27,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:45:27,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:29,983 INFO L130 PetriNetUnfolder]: 4049/6431 cut-off events. [2022-11-25 17:45:29,983 INFO L131 PetriNetUnfolder]: For 132272/132272 co-relation queries the response was YES. [2022-11-25 17:45:30,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47823 conditions, 6431 events. 4049/6431 cut-off events. For 132272/132272 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 38636 event pairs, 1181 based on Foata normal form. 4/5857 useless extension candidates. Maximal degree in co-relation 47728. Up to 3901 conditions per place. [2022-11-25 17:45:30,063 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 287 selfloop transitions, 85 changer transitions 0/372 dead transitions. [2022-11-25 17:45:30,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 372 transitions, 7418 flow [2022-11-25 17:45:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2367 transitions. [2022-11-25 17:45:30,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4264096559178526 [2022-11-25 17:45:30,067 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2367 transitions. [2022-11-25 17:45:30,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2367 transitions. [2022-11-25 17:45:30,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:30,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2367 transitions. [2022-11-25 17:45:30,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 338.14285714285717) internal successors, (2367), 7 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:30,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:30,079 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:30,079 INFO L175 Difference]: Start difference. First operand has 180 places, 274 transitions, 5432 flow. Second operand 7 states and 2367 transitions. [2022-11-25 17:45:30,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 372 transitions, 7418 flow [2022-11-25 17:45:30,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 372 transitions, 7288 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-11-25 17:45:30,794 INFO L231 Difference]: Finished difference. Result has 189 places, 285 transitions, 5842 flow [2022-11-25 17:45:30,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=5326, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5842, PETRI_PLACES=189, PETRI_TRANSITIONS=285} [2022-11-25 17:45:30,796 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2022-11-25 17:45:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 285 transitions, 5842 flow [2022-11-25 17:45:30,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:30,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:30,796 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-25 17:45:30,797 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2107475126, now seen corresponding path program 4 times [2022-11-25 17:45:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:30,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958647399] [2022-11-25 17:45:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:30,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:31,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958647399] [2022-11-25 17:45:31,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958647399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:31,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:31,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:31,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585956408] [2022-11-25 17:45:31,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:31,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:31,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:31,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:31,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 793 [2022-11-25 17:45:31,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 285 transitions, 5842 flow. Second operand has 7 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:31,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:31,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 793 [2022-11-25 17:45:31,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:34,025 INFO L130 PetriNetUnfolder]: 4193/6729 cut-off events. [2022-11-25 17:45:34,025 INFO L131 PetriNetUnfolder]: For 149621/149621 co-relation queries the response was YES. [2022-11-25 17:45:34,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50505 conditions, 6729 events. 4193/6729 cut-off events. For 149621/149621 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41735 event pairs, 407 based on Foata normal form. 10/6153 useless extension candidates. Maximal degree in co-relation 50406. Up to 2717 conditions per place. [2022-11-25 17:45:34,127 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 308 selfloop transitions, 199 changer transitions 4/511 dead transitions. [2022-11-25 17:45:34,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 511 transitions, 10555 flow [2022-11-25 17:45:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:45:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:45:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3664 transitions. [2022-11-25 17:45:34,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4200389774160266 [2022-11-25 17:45:34,133 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3664 transitions. [2022-11-25 17:45:34,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3664 transitions. [2022-11-25 17:45:34,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:34,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3664 transitions. [2022-11-25 17:45:34,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 333.09090909090907) internal successors, (3664), 11 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:34,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 793.0) internal successors, (9516), 12 states have internal predecessors, (9516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:34,151 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 793.0) internal successors, (9516), 12 states have internal predecessors, (9516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:34,151 INFO L175 Difference]: Start difference. First operand has 189 places, 285 transitions, 5842 flow. Second operand 11 states and 3664 transitions. [2022-11-25 17:45:34,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 511 transitions, 10555 flow [2022-11-25 17:45:35,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 511 transitions, 10362 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:35,165 INFO L231 Difference]: Finished difference. Result has 207 places, 375 transitions, 8380 flow [2022-11-25 17:45:35,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8380, PETRI_PLACES=207, PETRI_TRANSITIONS=375} [2022-11-25 17:45:35,166 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2022-11-25 17:45:35,166 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 375 transitions, 8380 flow [2022-11-25 17:45:35,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:35,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:35,167 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:35,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-25 17:45:35,167 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:35,167 INFO L85 PathProgramCache]: Analyzing trace with hash 642170586, now seen corresponding path program 5 times [2022-11-25 17:45:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:35,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655967720] [2022-11-25 17:45:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:35,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:35,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655967720] [2022-11-25 17:45:35,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655967720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:35,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024667125] [2022-11-25 17:45:35,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:36,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 793 [2022-11-25 17:45:36,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 375 transitions, 8380 flow. Second operand has 7 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:36,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:36,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 793 [2022-11-25 17:45:36,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:39,859 INFO L130 PetriNetUnfolder]: 5288/8569 cut-off events. [2022-11-25 17:45:39,859 INFO L131 PetriNetUnfolder]: For 216300/216300 co-relation queries the response was YES. [2022-11-25 17:45:39,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67189 conditions, 8569 events. 5288/8569 cut-off events. For 216300/216300 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 56073 event pairs, 523 based on Foata normal form. 16/8433 useless extension candidates. Maximal degree in co-relation 67081. Up to 3506 conditions per place. [2022-11-25 17:45:40,019 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 438 selfloop transitions, 178 changer transitions 3/619 dead transitions. [2022-11-25 17:45:40,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 619 transitions, 14411 flow [2022-11-25 17:45:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2345 transitions. [2022-11-25 17:45:40,024 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4224464060529634 [2022-11-25 17:45:40,024 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2345 transitions. [2022-11-25 17:45:40,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2345 transitions. [2022-11-25 17:45:40,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:40,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2345 transitions. [2022-11-25 17:45:40,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:40,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:40,031 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:40,031 INFO L175 Difference]: Start difference. First operand has 207 places, 375 transitions, 8380 flow. Second operand 7 states and 2345 transitions. [2022-11-25 17:45:40,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 619 transitions, 14411 flow [2022-11-25 17:45:41,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 619 transitions, 13823 flow, removed 121 selfloop flow, removed 4 redundant places. [2022-11-25 17:45:41,442 INFO L231 Difference]: Finished difference. Result has 214 places, 459 transitions, 10689 flow [2022-11-25 17:45:41,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=8002, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10689, PETRI_PLACES=214, PETRI_TRANSITIONS=459} [2022-11-25 17:45:41,443 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2022-11-25 17:45:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 459 transitions, 10689 flow [2022-11-25 17:45:41,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:41,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:41,444 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 17:45:41,444 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -761947468, now seen corresponding path program 6 times [2022-11-25 17:45:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:41,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053067676] [2022-11-25 17:45:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:41,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:41,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053067676] [2022-11-25 17:45:41,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053067676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:41,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:41,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:45:41,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187438093] [2022-11-25 17:45:41,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:41,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:45:41,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:45:41,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:45:42,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:45:42,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 459 transitions, 10689 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:42,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:42,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:45:42,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:46,040 INFO L130 PetriNetUnfolder]: 5278/8547 cut-off events. [2022-11-25 17:45:46,040 INFO L131 PetriNetUnfolder]: For 228430/228430 co-relation queries the response was YES. [2022-11-25 17:45:46,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69590 conditions, 8547 events. 5278/8547 cut-off events. For 228430/228430 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 55274 event pairs, 1162 based on Foata normal form. 4/8535 useless extension candidates. Maximal degree in co-relation 69478. Up to 4880 conditions per place. [2022-11-25 17:45:46,167 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 322 selfloop transitions, 200 changer transitions 4/526 dead transitions. [2022-11-25 17:45:46,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 526 transitions, 12511 flow [2022-11-25 17:45:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2363 transitions. [2022-11-25 17:45:46,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4256890650333273 [2022-11-25 17:45:46,171 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2363 transitions. [2022-11-25 17:45:46,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2363 transitions. [2022-11-25 17:45:46,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:46,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2363 transitions. [2022-11-25 17:45:46,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.57142857142856) internal successors, (2363), 7 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:46,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:46,181 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:46,182 INFO L175 Difference]: Start difference. First operand has 214 places, 459 transitions, 10689 flow. Second operand 7 states and 2363 transitions. [2022-11-25 17:45:46,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 526 transitions, 12511 flow [2022-11-25 17:45:47,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 526 transitions, 12427 flow, removed 42 selfloop flow, removed 0 redundant places. [2022-11-25 17:45:47,573 INFO L231 Difference]: Finished difference. Result has 221 places, 458 transitions, 10994 flow [2022-11-25 17:45:47,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=10585, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10994, PETRI_PLACES=221, PETRI_TRANSITIONS=458} [2022-11-25 17:45:47,573 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2022-11-25 17:45:47,574 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 458 transitions, 10994 flow [2022-11-25 17:45:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:47,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:47,574 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 17:45:47,574 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2044780574, now seen corresponding path program 7 times [2022-11-25 17:45:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:47,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945516023] [2022-11-25 17:45:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:48,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945516023] [2022-11-25 17:45:48,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945516023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:48,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:48,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:45:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326990875] [2022-11-25 17:45:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:48,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:45:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:45:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:45:48,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 793 [2022-11-25 17:45:48,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 458 transitions, 10994 flow. Second operand has 8 states, 8 states have (on average 322.75) internal successors, (2582), 8 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:48,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:48,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 793 [2022-11-25 17:45:48,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:53,047 INFO L130 PetriNetUnfolder]: 5936/9914 cut-off events. [2022-11-25 17:45:53,048 INFO L131 PetriNetUnfolder]: For 268585/268585 co-relation queries the response was YES. [2022-11-25 17:45:53,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79954 conditions, 9914 events. 5936/9914 cut-off events. For 268585/268585 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 69547 event pairs, 1000 based on Foata normal form. 16/9914 useless extension candidates. Maximal degree in co-relation 79840. Up to 2836 conditions per place. [2022-11-25 17:45:53,257 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 395 selfloop transitions, 217 changer transitions 0/612 dead transitions. [2022-11-25 17:45:53,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 612 transitions, 15029 flow [2022-11-25 17:45:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:45:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:45:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2336 transitions. [2022-11-25 17:45:53,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4208250765627815 [2022-11-25 17:45:53,261 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2336 transitions. [2022-11-25 17:45:53,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2336 transitions. [2022-11-25 17:45:53,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:53,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2336 transitions. [2022-11-25 17:45:53,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:53,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:53,273 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:53,273 INFO L175 Difference]: Start difference. First operand has 221 places, 458 transitions, 10994 flow. Second operand 7 states and 2336 transitions. [2022-11-25 17:45:53,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 612 transitions, 15029 flow [2022-11-25 17:45:55,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 612 transitions, 14610 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 17:45:55,370 INFO L231 Difference]: Finished difference. Result has 227 places, 493 transitions, 12212 flow [2022-11-25 17:45:55,371 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=10611, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12212, PETRI_PLACES=227, PETRI_TRANSITIONS=493} [2022-11-25 17:45:55,371 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2022-11-25 17:45:55,372 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 493 transitions, 12212 flow [2022-11-25 17:45:55,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 322.75) internal successors, (2582), 8 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:55,372 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:55,373 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:55,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 17:45:55,373 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:45:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 122432463, now seen corresponding path program 4 times [2022-11-25 17:45:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89013871] [2022-11-25 17:45:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:55,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:55,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89013871] [2022-11-25 17:45:55,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89013871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:55,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:55,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:45:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023897037] [2022-11-25 17:45:55,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:55,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:45:55,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:45:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:45:56,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 793 [2022-11-25 17:45:56,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 493 transitions, 12212 flow. Second operand has 8 states, 8 states have (on average 326.75) internal successors, (2614), 8 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:56,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:56,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 793 [2022-11-25 17:45:56,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:01,678 INFO L130 PetriNetUnfolder]: 5928/9906 cut-off events. [2022-11-25 17:46:01,679 INFO L131 PetriNetUnfolder]: For 284123/284123 co-relation queries the response was YES. [2022-11-25 17:46:01,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81832 conditions, 9906 events. 5928/9906 cut-off events. For 284123/284123 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 68934 event pairs, 1538 based on Foata normal form. 8/9898 useless extension candidates. Maximal degree in co-relation 81714. Up to 6713 conditions per place. [2022-11-25 17:46:01,866 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 328 selfloop transitions, 226 changer transitions 0/554 dead transitions. [2022-11-25 17:46:01,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 554 transitions, 13895 flow [2022-11-25 17:46:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:46:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:46:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2355 transitions. [2022-11-25 17:46:01,870 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4242478832642767 [2022-11-25 17:46:01,870 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2355 transitions. [2022-11-25 17:46:01,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2355 transitions. [2022-11-25 17:46:01,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:01,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2355 transitions. [2022-11-25 17:46:01,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 336.42857142857144) internal successors, (2355), 7 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:01,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:01,879 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:01,879 INFO L175 Difference]: Start difference. First operand has 227 places, 493 transitions, 12212 flow. Second operand 7 states and 2355 transitions. [2022-11-25 17:46:01,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 554 transitions, 13895 flow [2022-11-25 17:46:03,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 554 transitions, 13671 flow, removed 47 selfloop flow, removed 1 redundant places. [2022-11-25 17:46:03,743 INFO L231 Difference]: Finished difference. Result has 232 places, 492 transitions, 12421 flow [2022-11-25 17:46:03,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=11969, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12421, PETRI_PLACES=232, PETRI_TRANSITIONS=492} [2022-11-25 17:46:03,744 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2022-11-25 17:46:03,744 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 492 transitions, 12421 flow [2022-11-25 17:46:03,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 326.75) internal successors, (2614), 8 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:03,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:03,746 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:03,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 17:46:03,746 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:46:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:03,747 INFO L85 PathProgramCache]: Analyzing trace with hash -774166231, now seen corresponding path program 5 times [2022-11-25 17:46:03,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:03,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656015934] [2022-11-25 17:46:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:03,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:04,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:04,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656015934] [2022-11-25 17:46:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656015934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:04,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:04,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:46:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500843974] [2022-11-25 17:46:04,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:04,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:46:04,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:46:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:46:04,901 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 793 [2022-11-25 17:46:04,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 492 transitions, 12421 flow. Second operand has 7 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:04,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:04,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 793 [2022-11-25 17:46:04,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:10,085 INFO L130 PetriNetUnfolder]: 5912/9876 cut-off events. [2022-11-25 17:46:10,085 INFO L131 PetriNetUnfolder]: For 286394/286394 co-relation queries the response was YES. [2022-11-25 17:46:10,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81411 conditions, 9876 events. 5912/9876 cut-off events. For 286394/286394 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 68970 event pairs, 917 based on Foata normal form. 6/9866 useless extension candidates. Maximal degree in co-relation 81293. Up to 3739 conditions per place. [2022-11-25 17:46:10,276 INFO L137 encePairwiseOnDemand]: 784/793 looper letters, 333 selfloop transitions, 370 changer transitions 3/706 dead transitions. [2022-11-25 17:46:10,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 706 transitions, 18200 flow [2022-11-25 17:46:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:46:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:46:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3328 transitions. [2022-11-25 17:46:10,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.419672131147541 [2022-11-25 17:46:10,281 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3328 transitions. [2022-11-25 17:46:10,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3328 transitions. [2022-11-25 17:46:10,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:10,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3328 transitions. [2022-11-25 17:46:10,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 332.8) internal successors, (3328), 10 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:10,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 793.0) internal successors, (8723), 11 states have internal predecessors, (8723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:10,290 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 793.0) internal successors, (8723), 11 states have internal predecessors, (8723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:10,290 INFO L175 Difference]: Start difference. First operand has 232 places, 492 transitions, 12421 flow. Second operand 10 states and 3328 transitions. [2022-11-25 17:46:10,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 706 transitions, 18200 flow [2022-11-25 17:46:12,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 706 transitions, 17559 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:46:12,235 INFO L231 Difference]: Finished difference. Result has 237 places, 605 transitions, 15632 flow [2022-11-25 17:46:12,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=11960, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15632, PETRI_PLACES=237, PETRI_TRANSITIONS=605} [2022-11-25 17:46:12,236 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2022-11-25 17:46:12,236 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 605 transitions, 15632 flow [2022-11-25 17:46:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.14285714285717) internal successors, (2276), 7 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:12,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:12,237 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:12,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 17:46:12,237 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:46:12,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash -294227637, now seen corresponding path program 6 times [2022-11-25 17:46:12,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:12,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290041693] [2022-11-25 17:46:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:12,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:12,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:12,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290041693] [2022-11-25 17:46:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290041693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:12,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:12,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:46:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071582290] [2022-11-25 17:46:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:46:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:46:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:46:13,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 793 [2022-11-25 17:46:13,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 605 transitions, 15632 flow. Second operand has 8 states, 8 states have (on average 326.75) internal successors, (2614), 8 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:13,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:13,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 793 [2022-11-25 17:46:13,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:19,122 INFO L130 PetriNetUnfolder]: 6639/11047 cut-off events. [2022-11-25 17:46:19,122 INFO L131 PetriNetUnfolder]: For 315725/315725 co-relation queries the response was YES. [2022-11-25 17:46:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93099 conditions, 11047 events. 6639/11047 cut-off events. For 315725/315725 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 78148 event pairs, 795 based on Foata normal form. 8/11055 useless extension candidates. Maximal degree in co-relation 92981. Up to 4657 conditions per place. [2022-11-25 17:46:19,331 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 581 selfloop transitions, 192 changer transitions 0/773 dead transitions. [2022-11-25 17:46:19,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 773 transitions, 20994 flow [2022-11-25 17:46:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:46:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:46:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2345 transitions. [2022-11-25 17:46:19,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4224464060529634 [2022-11-25 17:46:19,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2345 transitions. [2022-11-25 17:46:19,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2345 transitions. [2022-11-25 17:46:19,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:19,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2345 transitions. [2022-11-25 17:46:19,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 335.0) internal successors, (2345), 7 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:19,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:19,340 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:19,341 INFO L175 Difference]: Start difference. First operand has 237 places, 605 transitions, 15632 flow. Second operand 7 states and 2345 transitions. [2022-11-25 17:46:19,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 773 transitions, 20994 flow [2022-11-25 17:46:22,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 773 transitions, 20650 flow, removed 172 selfloop flow, removed 0 redundant places. [2022-11-25 17:46:22,121 INFO L231 Difference]: Finished difference. Result has 247 places, 669 transitions, 18038 flow [2022-11-25 17:46:22,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=15406, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18038, PETRI_PLACES=247, PETRI_TRANSITIONS=669} [2022-11-25 17:46:22,122 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2022-11-25 17:46:22,123 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 669 transitions, 18038 flow [2022-11-25 17:46:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 326.75) internal successors, (2614), 8 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:22,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:22,124 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-25 17:46:22,125 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:46:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash -14734884, now seen corresponding path program 8 times [2022-11-25 17:46:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:22,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919965471] [2022-11-25 17:46:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:22,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919965471] [2022-11-25 17:46:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919965471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:22,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:22,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:46:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296715322] [2022-11-25 17:46:22,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:22,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:46:22,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:22,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:46:22,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:46:23,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:46:23,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 669 transitions, 18038 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:23,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:23,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:46:23,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:29,614 INFO L130 PetriNetUnfolder]: 6623/11019 cut-off events. [2022-11-25 17:46:29,614 INFO L131 PetriNetUnfolder]: For 346141/346141 co-relation queries the response was YES. [2022-11-25 17:46:29,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94091 conditions, 11019 events. 6623/11019 cut-off events. For 346141/346141 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 77556 event pairs, 1640 based on Foata normal form. 10/11029 useless extension candidates. Maximal degree in co-relation 93968. Up to 7258 conditions per place. [2022-11-25 17:46:29,832 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 320 selfloop transitions, 408 changer transitions 0/728 dead transitions. [2022-11-25 17:46:29,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 728 transitions, 20078 flow [2022-11-25 17:46:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:46:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:46:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2365 transitions. [2022-11-25 17:46:29,836 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42604936047559 [2022-11-25 17:46:29,836 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2365 transitions. [2022-11-25 17:46:29,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2365 transitions. [2022-11-25 17:46:29,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:29,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2365 transitions. [2022-11-25 17:46:29,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 337.85714285714283) internal successors, (2365), 7 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:29,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:29,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:29,842 INFO L175 Difference]: Start difference. First operand has 247 places, 669 transitions, 18038 flow. Second operand 7 states and 2365 transitions. [2022-11-25 17:46:29,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 728 transitions, 20078 flow [2022-11-25 17:46:32,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 728 transitions, 19449 flow, removed 218 selfloop flow, removed 3 redundant places. [2022-11-25 17:46:32,705 INFO L231 Difference]: Finished difference. Result has 250 places, 668 transitions, 18205 flow [2022-11-25 17:46:32,706 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=17389, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18205, PETRI_PLACES=250, PETRI_TRANSITIONS=668} [2022-11-25 17:46:32,707 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2022-11-25 17:46:32,707 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 668 transitions, 18205 flow [2022-11-25 17:46:32,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:32,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:32,708 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:32,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-25 17:46:32,709 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:46:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash 835207567, now seen corresponding path program 7 times [2022-11-25 17:46:32,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:32,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477906601] [2022-11-25 17:46:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:32,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:33,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477906601] [2022-11-25 17:46:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477906601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:33,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500959882] [2022-11-25 17:46:33,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:46:33,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:33,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:33,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:46:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:46:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:33,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:34,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500959882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:34,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:46:34,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-11-25 17:46:34,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586824263] [2022-11-25 17:46:34,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:34,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:46:34,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:34,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:46:34,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:46:35,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 793 [2022-11-25 17:46:35,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 668 transitions, 18205 flow. Second operand has 19 states, 19 states have (on average 312.3157894736842) internal successors, (5934), 19 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:35,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:35,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 793 [2022-11-25 17:46:35,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:43,086 INFO L130 PetriNetUnfolder]: 7745/12917 cut-off events. [2022-11-25 17:46:43,086 INFO L131 PetriNetUnfolder]: For 375507/375507 co-relation queries the response was YES. [2022-11-25 17:46:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109304 conditions, 12917 events. 7745/12917 cut-off events. For 375507/375507 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 94204 event pairs, 1322 based on Foata normal form. 8/12925 useless extension candidates. Maximal degree in co-relation 109182. Up to 4932 conditions per place. [2022-11-25 17:46:43,338 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 472 selfloop transitions, 347 changer transitions 0/819 dead transitions. [2022-11-25 17:46:43,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 819 transitions, 23149 flow [2022-11-25 17:46:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:46:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:46:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2260 transitions. [2022-11-25 17:46:43,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40713384975680056 [2022-11-25 17:46:43,342 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2260 transitions. [2022-11-25 17:46:43,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2260 transitions. [2022-11-25 17:46:43,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:43,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2260 transitions. [2022-11-25 17:46:43,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 322.85714285714283) internal successors, (2260), 7 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:43,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:43,353 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:43,353 INFO L175 Difference]: Start difference. First operand has 250 places, 668 transitions, 18205 flow. Second operand 7 states and 2260 transitions. [2022-11-25 17:46:43,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 819 transitions, 23149 flow [2022-11-25 17:46:46,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 819 transitions, 22266 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 17:46:46,981 INFO L231 Difference]: Finished difference. Result has 256 places, 724 transitions, 20063 flow [2022-11-25 17:46:46,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=17426, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20063, PETRI_PLACES=256, PETRI_TRANSITIONS=724} [2022-11-25 17:46:46,983 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2022-11-25 17:46:46,983 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 724 transitions, 20063 flow [2022-11-25 17:46:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 312.3157894736842) internal successors, (5934), 19 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:46,985 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:46,985 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:46,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:46:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d9c279-36bc-4b2f-b9e5-1f759687bd8c/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:47,192 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:46:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 793191134, now seen corresponding path program 9 times [2022-11-25 17:46:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:47,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682451246] [2022-11-25 17:46:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:46:47,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682451246] [2022-11-25 17:46:47,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682451246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:46:47,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:46:47,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:46:47,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97987299] [2022-11-25 17:46:47,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:46:47,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:46:47,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:47,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:46:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:46:48,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 793 [2022-11-25 17:46:48,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 724 transitions, 20063 flow. Second operand has 7 states, 7 states have (on average 327.14285714285717) internal successors, (2290), 7 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:48,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:46:48,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 793 [2022-11-25 17:46:48,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:46:55,862 INFO L130 PetriNetUnfolder]: 7735/12895 cut-off events. [2022-11-25 17:46:55,862 INFO L131 PetriNetUnfolder]: For 383222/383222 co-relation queries the response was YES. [2022-11-25 17:46:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109216 conditions, 12895 events. 7735/12895 cut-off events. For 383222/383222 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 93587 event pairs, 2008 based on Foata normal form. 4/12899 useless extension candidates. Maximal degree in co-relation 109091. Up to 8964 conditions per place. [2022-11-25 17:46:56,150 INFO L137 encePairwiseOnDemand]: 785/793 looper letters, 319 selfloop transitions, 458 changer transitions 4/781 dead transitions. [2022-11-25 17:46:56,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 781 transitions, 22184 flow [2022-11-25 17:46:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:46:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:46:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2347 transitions. [2022-11-25 17:46:56,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4228067014952261 [2022-11-25 17:46:56,156 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2347 transitions. [2022-11-25 17:46:56,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2347 transitions. [2022-11-25 17:46:56,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:46:56,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2347 transitions. [2022-11-25 17:46:56,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 335.2857142857143) internal successors, (2347), 7 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:56,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:56,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 793.0) internal successors, (6344), 8 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:56,165 INFO L175 Difference]: Start difference. First operand has 256 places, 724 transitions, 20063 flow. Second operand 7 states and 2347 transitions. [2022-11-25 17:46:56,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 781 transitions, 22184 flow [2022-11-25 17:46:59,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 781 transitions, 21416 flow, removed 201 selfloop flow, removed 2 redundant places. [2022-11-25 17:46:59,891 INFO L231 Difference]: Finished difference. Result has 260 places, 722 transitions, 20152 flow [2022-11-25 17:46:59,892 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=793, PETRI_DIFFERENCE_MINUEND_FLOW=19257, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20152, PETRI_PLACES=260, PETRI_TRANSITIONS=722} [2022-11-25 17:46:59,893 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2022-11-25 17:46:59,893 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 722 transitions, 20152 flow [2022-11-25 17:46:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 327.14285714285717) internal successors, (2290), 7 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:46:59,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:46:59,894 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:59,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-25 17:46:59,894 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 17:46:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash -476150194, now seen corresponding path program 10 times [2022-11-25 17:46:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138808773] [2022-11-25 17:46:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:47:00,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:00,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138808773] [2022-11-25 17:47:00,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138808773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:00,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:00,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:47:00,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951481661] [2022-11-25 17:47:00,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:00,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:47:00,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:00,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:47:00,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:47:00,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 793 [2022-11-25 17:47:00,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 722 transitions, 20152 flow. Second operand has 7 states, 7 states have (on average 329.14285714285717) internal successors, (2304), 7 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:47:00,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:47:00,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 793 [2022-11-25 17:47:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand