./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:44:30,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:44:30,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:44:30,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:44:30,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:44:30,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:44:30,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:44:30,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:44:30,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:44:30,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:44:30,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:44:30,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:44:30,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:44:30,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:44:30,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:44:30,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:44:30,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:44:30,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:44:30,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:44:30,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:44:30,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:44:30,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:44:30,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:44:30,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:44:30,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:44:30,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:44:30,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:44:30,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:44:30,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:44:30,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:44:30,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:44:30,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:44:30,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:44:30,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:44:30,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:44:30,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:44:30,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:44:30,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:44:30,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:44:30,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:44:30,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:44:30,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:44:30,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:44:30,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:44:30,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:44:30,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:44:30,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:44:30,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:44:30,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:44:30,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:44:30,306 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:44:30,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:44:30,307 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:44:30,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:44:30,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:44:30,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:44:30,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:44:30,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:44:30,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:44:30,309 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:44:30,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:44:30,309 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:44:30,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:44:30,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:44:30,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:44:30,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:44:30,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:44:30,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:44:30,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:44:30,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:44:30,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:44:30,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:44:30,312 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:44:30,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:44:30,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:44:30,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-10-17 10:44:30,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:44:30,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:44:30,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:44:30,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:44:30,712 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:44:30,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-10-17 10:44:30,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/data/abc9d5482/b1b2891d94e84c589a74b7fd8a7b1969/FLAGd66dbf6e9 [2022-10-17 10:44:31,294 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:44:31,295 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-10-17 10:44:31,306 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/data/abc9d5482/b1b2891d94e84c589a74b7fd8a7b1969/FLAGd66dbf6e9 [2022-10-17 10:44:31,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/data/abc9d5482/b1b2891d94e84c589a74b7fd8a7b1969 [2022-10-17 10:44:31,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:44:31,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:44:31,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:44:31,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:44:31,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:44:31,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:31,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2de747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31, skipping insertion in model container [2022-10-17 10:44:31,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:31,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:44:31,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:44:31,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-10-17 10:44:31,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:44:31,913 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:44:31,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-10-17 10:44:31,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:44:31,960 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:44:31,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31 WrapperNode [2022-10-17 10:44:31,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:44:31,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:44:31,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:44:31,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:44:31,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:31,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,007 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-10-17 10:44:32,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:44:32,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:44:32,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:44:32,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:44:32,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:44:32,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:44:32,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:44:32,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:44:32,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (1/1) ... [2022-10-17 10:44:32,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:44:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:44:32,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:44:32,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:44:32,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:44:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:44:32,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:44:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:44:32,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:44:32,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:44:32,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:44:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:44:32,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:44:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:44:32,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:44:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:44:32,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:44:32,154 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:44:32,327 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:44:32,329 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:44:32,804 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:44:32,818 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:44:32,818 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 10:44:32,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:44:32 BoogieIcfgContainer [2022-10-17 10:44:32,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:44:32,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:44:32,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:44:32,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:44:32,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:44:31" (1/3) ... [2022-10-17 10:44:32,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0e3b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:44:32, skipping insertion in model container [2022-10-17 10:44:32,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:44:31" (2/3) ... [2022-10-17 10:44:32,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a0e3b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:44:32, skipping insertion in model container [2022-10-17 10:44:32,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:44:32" (3/3) ... [2022-10-17 10:44:32,841 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-10-17 10:44:32,851 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:44:32,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:44:32,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:44:32,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:44:33,050 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:44:33,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2022-10-17 10:44:33,235 INFO L130 PetriNetUnfolder]: 25/244 cut-off events. [2022-10-17 10:44:33,235 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:44:33,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2022-10-17 10:44:33,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2022-10-17 10:44:33,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2022-10-17 10:44:33,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:44:33,276 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;@7ee5d7d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:44:33,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:44:33,337 INFO L130 PetriNetUnfolder]: 25/234 cut-off events. [2022-10-17 10:44:33,337 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:44:33,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:33,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:33,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1223781903, now seen corresponding path program 1 times [2022-10-17 10:44:33,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:33,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450797564] [2022-10-17 10:44:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:33,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:33,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:33,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450797564] [2022-10-17 10:44:33,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450797564] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:33,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:33,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:44:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52769704] [2022-10-17 10:44:33,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:33,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:44:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:44:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:44:33,718 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2022-10-17 10:44:33,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 233.0) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:33,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:33,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2022-10-17 10:44:33,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:33,785 INFO L130 PetriNetUnfolder]: 14/224 cut-off events. [2022-10-17 10:44:33,785 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-10-17 10:44:33,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 292 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2022-10-17 10:44:33,789 INFO L137 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2022-10-17 10:44:33,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2022-10-17 10:44:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:44:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:44:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2022-10-17 10:44:33,807 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2022-10-17 10:44:33,807 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2022-10-17 10:44:33,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2022-10-17 10:44:33,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:33,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2022-10-17 10:44:33,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:33,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:33,829 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:33,831 INFO L175 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2022-10-17 10:44:33,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2022-10-17 10:44:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:44:33,844 INFO L231 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2022-10-17 10:44:33,847 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2022-10-17 10:44:33,851 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2022-10-17 10:44:33,851 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2022-10-17 10:44:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 233.0) internal successors, (466), 2 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:33,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:33,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:33,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:44:33,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:33,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1845329235, now seen corresponding path program 1 times [2022-10-17 10:44:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:33,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229656821] [2022-10-17 10:44:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:33,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229656821] [2022-10-17 10:44:34,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229656821] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:34,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:34,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:44:34,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506544048] [2022-10-17 10:44:34,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:34,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:44:34,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:44:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:44:34,347 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-10-17 10:44:34,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:34,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-10-17 10:44:34,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:34,453 INFO L130 PetriNetUnfolder]: 25/303 cut-off events. [2022-10-17 10:44:34,454 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-10-17 10:44:34,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 303 events. 25/303 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 669 event pairs, 1 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 331. Up to 14 conditions per place. [2022-10-17 10:44:34,459 INFO L137 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2022-10-17 10:44:34,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2022-10-17 10:44:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:44:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:44:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-10-17 10:44:34,465 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2022-10-17 10:44:34,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-10-17 10:44:34,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-10-17 10:44:34,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:34,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-10-17 10:44:34,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,477 INFO L175 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2022-10-17 10:44:34,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2022-10-17 10:44:34,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:44:34,490 INFO L231 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2022-10-17 10:44:34,491 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2022-10-17 10:44:34,492 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2022-10-17 10:44:34,492 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2022-10-17 10:44:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:34,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:44:34,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash -167813377, now seen corresponding path program 1 times [2022-10-17 10:44:34,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103039703] [2022-10-17 10:44:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:34,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:34,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103039703] [2022-10-17 10:44:34,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103039703] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:34,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:34,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:44:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617909018] [2022-10-17 10:44:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:34,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:44:34,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:44:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:44:34,839 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-10-17 10:44:34,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:34,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-10-17 10:44:34,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:34,928 INFO L130 PetriNetUnfolder]: 25/327 cut-off events. [2022-10-17 10:44:34,928 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-10-17 10:44:34,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 327 events. 25/327 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 730 event pairs, 2 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 367. Up to 22 conditions per place. [2022-10-17 10:44:34,931 INFO L137 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-10-17 10:44:34,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 220 transitions, 476 flow [2022-10-17 10:44:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:44:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:44:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2022-10-17 10:44:34,935 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-10-17 10:44:34,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2022-10-17 10:44:34,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2022-10-17 10:44:34,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:34,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2022-10-17 10:44:34,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,945 INFO L175 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 690 transitions. [2022-10-17 10:44:34,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 220 transitions, 476 flow [2022-10-17 10:44:34,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 220 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:44:34,951 INFO L231 Difference]: Finished difference. Result has 211 places, 217 transitions, 450 flow [2022-10-17 10:44:34,952 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=450, PETRI_PLACES=211, PETRI_TRANSITIONS=217} [2022-10-17 10:44:34,954 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, -6 predicate places. [2022-10-17 10:44:34,955 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 217 transitions, 450 flow [2022-10-17 10:44:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:34,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:34,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:34,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:44:34,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -379076605, now seen corresponding path program 1 times [2022-10-17 10:44:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85863106] [2022-10-17 10:44:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:35,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85863106] [2022-10-17 10:44:35,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85863106] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:35,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:35,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:35,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804797092] [2022-10-17 10:44:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:35,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:35,371 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:35,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 217 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:35,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:35,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:35,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:35,824 INFO L130 PetriNetUnfolder]: 105/613 cut-off events. [2022-10-17 10:44:35,825 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-10-17 10:44:35,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 613 events. 105/613 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2700 event pairs, 35 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 914. Up to 188 conditions per place. [2022-10-17 10:44:35,833 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 77 selfloop transitions, 3 changer transitions 19/270 dead transitions. [2022-10-17 10:44:35,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 270 transitions, 761 flow [2022-10-17 10:44:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:44:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:44:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2453 transitions. [2022-10-17 10:44:35,842 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7670419011882427 [2022-10-17 10:44:35,842 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2453 transitions. [2022-10-17 10:44:35,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2453 transitions. [2022-10-17 10:44:35,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:35,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2453 transitions. [2022-10-17 10:44:35,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.69230769230768) internal successors, (2453), 13 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:35,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:35,899 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:35,899 INFO L175 Difference]: Start difference. First operand has 211 places, 217 transitions, 450 flow. Second operand 13 states and 2453 transitions. [2022-10-17 10:44:35,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 270 transitions, 761 flow [2022-10-17 10:44:35,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 270 transitions, 757 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:44:35,909 INFO L231 Difference]: Finished difference. Result has 232 places, 219 transitions, 489 flow [2022-10-17 10:44:35,910 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=489, PETRI_PLACES=232, PETRI_TRANSITIONS=219} [2022-10-17 10:44:35,912 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 15 predicate places. [2022-10-17 10:44:35,912 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 219 transitions, 489 flow [2022-10-17 10:44:35,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:35,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:35,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:35,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:44:35,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash -605981825, now seen corresponding path program 1 times [2022-10-17 10:44:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:35,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973967336] [2022-10-17 10:44:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:35,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:35,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973967336] [2022-10-17 10:44:35,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973967336] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:35,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:35,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:44:35,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030703253] [2022-10-17 10:44:35,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:35,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:44:35,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:44:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:44:36,001 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-10-17 10:44:36,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 219 transitions, 489 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:36,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-10-17 10:44:36,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:36,159 INFO L130 PetriNetUnfolder]: 48/624 cut-off events. [2022-10-17 10:44:36,160 INFO L131 PetriNetUnfolder]: For 102/117 co-relation queries the response was YES. [2022-10-17 10:44:36,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 624 events. 48/624 cut-off events. For 102/117 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2878 event pairs, 19 based on Foata normal form. 0/575 useless extension candidates. Maximal degree in co-relation 858. Up to 61 conditions per place. [2022-10-17 10:44:36,166 INFO L137 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-10-17 10:44:36,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 224 transitions, 544 flow [2022-10-17 10:44:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:44:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:44:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-10-17 10:44:36,170 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-10-17 10:44:36,170 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-10-17 10:44:36,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-10-17 10:44:36,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:36,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-10-17 10:44:36,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,177 INFO L175 Difference]: Start difference. First operand has 232 places, 219 transitions, 489 flow. Second operand 3 states and 677 transitions. [2022-10-17 10:44:36,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 224 transitions, 544 flow [2022-10-17 10:44:36,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 224 transitions, 531 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-10-17 10:44:36,191 INFO L231 Difference]: Finished difference. Result has 221 places, 221 transitions, 496 flow [2022-10-17 10:44:36,192 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=496, PETRI_PLACES=221, PETRI_TRANSITIONS=221} [2022-10-17 10:44:36,194 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 4 predicate places. [2022-10-17 10:44:36,194 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 221 transitions, 496 flow [2022-10-17 10:44:36,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:36,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:36,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:44:36,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:36,199 INFO L85 PathProgramCache]: Analyzing trace with hash -973739483, now seen corresponding path program 1 times [2022-10-17 10:44:36,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:36,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883124956] [2022-10-17 10:44:36,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:36,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883124956] [2022-10-17 10:44:36,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883124956] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:36,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:36,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:44:36,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853893954] [2022-10-17 10:44:36,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:36,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:44:36,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:44:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:44:36,275 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-10-17 10:44:36,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 221 transitions, 496 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:36,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-10-17 10:44:36,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:36,432 INFO L130 PetriNetUnfolder]: 42/547 cut-off events. [2022-10-17 10:44:36,433 INFO L131 PetriNetUnfolder]: For 71/75 co-relation queries the response was YES. [2022-10-17 10:44:36,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 547 events. 42/547 cut-off events. For 71/75 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2156 event pairs, 18 based on Foata normal form. 4/512 useless extension candidates. Maximal degree in co-relation 715. Up to 47 conditions per place. [2022-10-17 10:44:36,439 INFO L137 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-10-17 10:44:36,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 226 transitions, 559 flow [2022-10-17 10:44:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:44:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:44:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-10-17 10:44:36,442 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-10-17 10:44:36,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-10-17 10:44:36,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-10-17 10:44:36,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:36,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-10-17 10:44:36,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,449 INFO L175 Difference]: Start difference. First operand has 221 places, 221 transitions, 496 flow. Second operand 3 states and 677 transitions. [2022-10-17 10:44:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 226 transitions, 559 flow [2022-10-17 10:44:36,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 226 transitions, 557 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:44:36,459 INFO L231 Difference]: Finished difference. Result has 224 places, 223 transitions, 518 flow [2022-10-17 10:44:36,460 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=518, PETRI_PLACES=224, PETRI_TRANSITIONS=223} [2022-10-17 10:44:36,463 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 7 predicate places. [2022-10-17 10:44:36,463 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 223 transitions, 518 flow [2022-10-17 10:44:36,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:36,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:36,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:44:36,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1018961335, now seen corresponding path program 1 times [2022-10-17 10:44:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:36,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732035449] [2022-10-17 10:44:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:36,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732035449] [2022-10-17 10:44:36,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732035449] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:36,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:36,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:44:36,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420849981] [2022-10-17 10:44:36,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:36,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:44:36,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:44:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:44:36,566 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-10-17 10:44:36,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 223 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:36,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-10-17 10:44:36,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:36,746 INFO L130 PetriNetUnfolder]: 46/649 cut-off events. [2022-10-17 10:44:36,746 INFO L131 PetriNetUnfolder]: For 90/91 co-relation queries the response was YES. [2022-10-17 10:44:36,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 649 events. 46/649 cut-off events. For 90/91 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2970 event pairs, 19 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 854. Up to 54 conditions per place. [2022-10-17 10:44:36,752 INFO L137 encePairwiseOnDemand]: 244/246 looper letters, 24 selfloop transitions, 1 changer transitions 0/228 dead transitions. [2022-10-17 10:44:36,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 228 transitions, 583 flow [2022-10-17 10:44:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:44:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:44:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-10-17 10:44:36,755 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9159891598915989 [2022-10-17 10:44:36,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-10-17 10:44:36,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-10-17 10:44:36,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:36,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-10-17 10:44:36,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,764 INFO L175 Difference]: Start difference. First operand has 224 places, 223 transitions, 518 flow. Second operand 3 states and 676 transitions. [2022-10-17 10:44:36,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 228 transitions, 583 flow [2022-10-17 10:44:36,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 228 transitions, 577 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-10-17 10:44:36,773 INFO L231 Difference]: Finished difference. Result has 226 places, 223 transitions, 517 flow [2022-10-17 10:44:36,774 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=517, PETRI_PLACES=226, PETRI_TRANSITIONS=223} [2022-10-17 10:44:36,774 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 9 predicate places. [2022-10-17 10:44:36,774 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 223 transitions, 517 flow [2022-10-17 10:44:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:36,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:36,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:36,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:44:36,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1685003057, now seen corresponding path program 2 times [2022-10-17 10:44:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:36,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140955503] [2022-10-17 10:44:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:36,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:37,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:37,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140955503] [2022-10-17 10:44:37,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140955503] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:37,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:37,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:37,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51171802] [2022-10-17 10:44:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:37,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:37,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:37,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:37,182 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:37,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 223 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:37,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:37,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:37,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:37,673 INFO L130 PetriNetUnfolder]: 92/776 cut-off events. [2022-10-17 10:44:37,673 INFO L131 PetriNetUnfolder]: For 156/159 co-relation queries the response was YES. [2022-10-17 10:44:37,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 776 events. 92/776 cut-off events. For 156/159 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4200 event pairs, 39 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 1293. Up to 216 conditions per place. [2022-10-17 10:44:37,680 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 78 selfloop transitions, 3 changer transitions 22/278 dead transitions. [2022-10-17 10:44:37,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 278 transitions, 922 flow [2022-10-17 10:44:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:44:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:44:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2449 transitions. [2022-10-17 10:44:37,689 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.765791119449656 [2022-10-17 10:44:37,690 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2449 transitions. [2022-10-17 10:44:37,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2449 transitions. [2022-10-17 10:44:37,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:37,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2449 transitions. [2022-10-17 10:44:37,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.3846153846154) internal successors, (2449), 13 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:37,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:37,711 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:37,711 INFO L175 Difference]: Start difference. First operand has 226 places, 223 transitions, 517 flow. Second operand 13 states and 2449 transitions. [2022-10-17 10:44:37,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 278 transitions, 922 flow [2022-10-17 10:44:37,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 278 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:44:37,727 INFO L231 Difference]: Finished difference. Result has 248 places, 225 transitions, 563 flow [2022-10-17 10:44:37,728 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=563, PETRI_PLACES=248, PETRI_TRANSITIONS=225} [2022-10-17 10:44:37,730 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 31 predicate places. [2022-10-17 10:44:37,730 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 225 transitions, 563 flow [2022-10-17 10:44:37,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:37,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:37,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:44:37,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1215411841, now seen corresponding path program 1 times [2022-10-17 10:44:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:37,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970283551] [2022-10-17 10:44:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:38,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970283551] [2022-10-17 10:44:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970283551] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:38,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:38,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-10-17 10:44:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363284689] [2022-10-17 10:44:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:44:38,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:44:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:44:38,991 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-10-17 10:44:38,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 225 transitions, 563 flow. Second operand has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:38,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:38,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-10-17 10:44:38,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:41,127 INFO L130 PetriNetUnfolder]: 296/2579 cut-off events. [2022-10-17 10:44:41,128 INFO L131 PetriNetUnfolder]: For 955/988 co-relation queries the response was YES. [2022-10-17 10:44:41,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4304 conditions, 2579 events. 296/2579 cut-off events. For 955/988 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 22339 event pairs, 92 based on Foata normal form. 13/2401 useless extension candidates. Maximal degree in co-relation 4279. Up to 230 conditions per place. [2022-10-17 10:44:41,154 INFO L137 encePairwiseOnDemand]: 215/246 looper letters, 162 selfloop transitions, 51 changer transitions 13/381 dead transitions. [2022-10-17 10:44:41,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 1467 flow [2022-10-17 10:44:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-17 10:44:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-10-17 10:44:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4667 transitions. [2022-10-17 10:44:41,171 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6775551684088269 [2022-10-17 10:44:41,172 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4667 transitions. [2022-10-17 10:44:41,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4667 transitions. [2022-10-17 10:44:41,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:41,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4667 transitions. [2022-10-17 10:44:41,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.67857142857142) internal successors, (4667), 28 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,214 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,215 INFO L175 Difference]: Start difference. First operand has 248 places, 225 transitions, 563 flow. Second operand 28 states and 4667 transitions. [2022-10-17 10:44:41,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 1467 flow [2022-10-17 10:44:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 381 transitions, 1420 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-10-17 10:44:41,234 INFO L231 Difference]: Finished difference. Result has 273 places, 266 transitions, 933 flow [2022-10-17 10:44:41,235 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=933, PETRI_PLACES=273, PETRI_TRANSITIONS=266} [2022-10-17 10:44:41,236 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 56 predicate places. [2022-10-17 10:44:41,236 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 266 transitions, 933 flow [2022-10-17 10:44:41,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 161.7) internal successors, (3234), 20 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:41,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:41,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:44:41,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:41,240 INFO L85 PathProgramCache]: Analyzing trace with hash -982366631, now seen corresponding path program 1 times [2022-10-17 10:44:41,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597310141] [2022-10-17 10:44:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:41,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597310141] [2022-10-17 10:44:41,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597310141] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:41,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:44:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451790000] [2022-10-17 10:44:41,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:41,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:44:41,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:41,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:44:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:44:41,322 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-10-17 10:44:41,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 266 transitions, 933 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:41,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-10-17 10:44:41,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:41,810 INFO L130 PetriNetUnfolder]: 159/1962 cut-off events. [2022-10-17 10:44:41,810 INFO L131 PetriNetUnfolder]: For 916/941 co-relation queries the response was YES. [2022-10-17 10:44:41,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 1962 events. 159/1962 cut-off events. For 916/941 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 15533 event pairs, 45 based on Foata normal form. 19/1878 useless extension candidates. Maximal degree in co-relation 3229. Up to 91 conditions per place. [2022-10-17 10:44:41,830 INFO L137 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2022-10-17 10:44:41,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 276 transitions, 1025 flow [2022-10-17 10:44:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:44:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:44:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2022-10-17 10:44:41,834 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-10-17 10:44:41,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2022-10-17 10:44:41,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2022-10-17 10:44:41,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:41,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2022-10-17 10:44:41,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,843 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,843 INFO L175 Difference]: Start difference. First operand has 273 places, 266 transitions, 933 flow. Second operand 4 states and 902 transitions. [2022-10-17 10:44:41,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 276 transitions, 1025 flow [2022-10-17 10:44:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 276 transitions, 979 flow, removed 15 selfloop flow, removed 10 redundant places. [2022-10-17 10:44:41,866 INFO L231 Difference]: Finished difference. Result has 266 places, 268 transitions, 915 flow [2022-10-17 10:44:41,868 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=915, PETRI_PLACES=266, PETRI_TRANSITIONS=268} [2022-10-17 10:44:41,869 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2022-10-17 10:44:41,869 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 268 transitions, 915 flow [2022-10-17 10:44:41,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:41,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:41,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:41,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:44:41,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash -507518259, now seen corresponding path program 1 times [2022-10-17 10:44:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:41,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756137516] [2022-10-17 10:44:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:42,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756137516] [2022-10-17 10:44:42,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756137516] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:42,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:42,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079705384] [2022-10-17 10:44:42,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:42,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:42,221 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:42,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 268 transitions, 915 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:42,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:42,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:42,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:42,861 INFO L130 PetriNetUnfolder]: 229/2099 cut-off events. [2022-10-17 10:44:42,861 INFO L131 PetriNetUnfolder]: For 1915/1972 co-relation queries the response was YES. [2022-10-17 10:44:42,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 2099 events. 229/2099 cut-off events. For 1915/1972 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 17248 event pairs, 57 based on Foata normal form. 3/2034 useless extension candidates. Maximal degree in co-relation 4361. Up to 571 conditions per place. [2022-10-17 10:44:42,885 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 109 selfloop transitions, 8 changer transitions 18/320 dead transitions. [2022-10-17 10:44:42,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 320 transitions, 1476 flow [2022-10-17 10:44:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:44:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:44:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2445 transitions. [2022-10-17 10:44:42,894 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7645403377110694 [2022-10-17 10:44:42,894 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2445 transitions. [2022-10-17 10:44:42,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2445 transitions. [2022-10-17 10:44:42,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:42,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2445 transitions. [2022-10-17 10:44:42,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.07692307692307) internal successors, (2445), 13 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:42,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:42,914 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:42,914 INFO L175 Difference]: Start difference. First operand has 266 places, 268 transitions, 915 flow. Second operand 13 states and 2445 transitions. [2022-10-17 10:44:42,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 320 transitions, 1476 flow [2022-10-17 10:44:42,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 320 transitions, 1472 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-10-17 10:44:42,941 INFO L231 Difference]: Finished difference. Result has 286 places, 268 transitions, 953 flow [2022-10-17 10:44:42,942 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=953, PETRI_PLACES=286, PETRI_TRANSITIONS=268} [2022-10-17 10:44:42,942 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 69 predicate places. [2022-10-17 10:44:42,943 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 268 transitions, 953 flow [2022-10-17 10:44:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:42,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:42,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:42,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:44:42,944 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1846078997, now seen corresponding path program 2 times [2022-10-17 10:44:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:42,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19150418] [2022-10-17 10:44:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:42,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:43,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:43,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19150418] [2022-10-17 10:44:43,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19150418] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:43,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:43,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:44:43,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898671739] [2022-10-17 10:44:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:43,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:44:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:44:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:44:43,064 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-10-17 10:44:43,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 268 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:43,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:43,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-10-17 10:44:43,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:43,460 INFO L130 PetriNetUnfolder]: 144/1845 cut-off events. [2022-10-17 10:44:43,460 INFO L131 PetriNetUnfolder]: For 995/1014 co-relation queries the response was YES. [2022-10-17 10:44:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3152 conditions, 1845 events. 144/1845 cut-off events. For 995/1014 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 14266 event pairs, 30 based on Foata normal form. 4/1758 useless extension candidates. Maximal degree in co-relation 3110. Up to 82 conditions per place. [2022-10-17 10:44:43,482 INFO L137 encePairwiseOnDemand]: 241/246 looper letters, 28 selfloop transitions, 4 changer transitions 0/278 dead transitions. [2022-10-17 10:44:43,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 278 transitions, 1053 flow [2022-10-17 10:44:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:44:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:44:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 901 transitions. [2022-10-17 10:44:43,486 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.915650406504065 [2022-10-17 10:44:43,486 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 901 transitions. [2022-10-17 10:44:43,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 901 transitions. [2022-10-17 10:44:43,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:43,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 901 transitions. [2022-10-17 10:44:43,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.25) internal successors, (901), 4 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:43,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:43,494 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:43,495 INFO L175 Difference]: Start difference. First operand has 286 places, 268 transitions, 953 flow. Second operand 4 states and 901 transitions. [2022-10-17 10:44:43,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 278 transitions, 1053 flow [2022-10-17 10:44:43,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 278 transitions, 981 flow, removed 18 selfloop flow, removed 13 redundant places. [2022-10-17 10:44:43,517 INFO L231 Difference]: Finished difference. Result has 270 places, 270 transitions, 911 flow [2022-10-17 10:44:43,518 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=911, PETRI_PLACES=270, PETRI_TRANSITIONS=270} [2022-10-17 10:44:43,519 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 53 predicate places. [2022-10-17 10:44:43,519 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 270 transitions, 911 flow [2022-10-17 10:44:43,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:43,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:43,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:43,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:44:43,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:43,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1689246523, now seen corresponding path program 2 times [2022-10-17 10:44:43,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:43,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899882063] [2022-10-17 10:44:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:43,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:43,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:43,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899882063] [2022-10-17 10:44:43,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899882063] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:43,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:43,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:43,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062751036] [2022-10-17 10:44:43,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:43,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:43,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:43,806 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:43,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 270 transitions, 911 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:43,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:43,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:43,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:44,369 INFO L130 PetriNetUnfolder]: 196/1948 cut-off events. [2022-10-17 10:44:44,369 INFO L131 PetriNetUnfolder]: For 1436/1544 co-relation queries the response was YES. [2022-10-17 10:44:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3919 conditions, 1948 events. 196/1948 cut-off events. For 1436/1544 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 15545 event pairs, 70 based on Foata normal form. 3/1874 useless extension candidates. Maximal degree in co-relation 3885. Up to 655 conditions per place. [2022-10-17 10:44:44,391 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 90 selfloop transitions, 10 changer transitions 18/305 dead transitions. [2022-10-17 10:44:44,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 305 transitions, 1364 flow [2022-10-17 10:44:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:44:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-10-17 10:44:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2022-10-17 10:44:44,401 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7623798965262379 [2022-10-17 10:44:44,401 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2022-10-17 10:44:44,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2022-10-17 10:44:44,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:44,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2022-10-17 10:44:44,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:44,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:44,419 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:44,420 INFO L175 Difference]: Start difference. First operand has 270 places, 270 transitions, 911 flow. Second operand 11 states and 2063 transitions. [2022-10-17 10:44:44,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 305 transitions, 1364 flow [2022-10-17 10:44:44,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 305 transitions, 1358 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-10-17 10:44:44,440 INFO L231 Difference]: Finished difference. Result has 287 places, 278 transitions, 1024 flow [2022-10-17 10:44:44,440 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1024, PETRI_PLACES=287, PETRI_TRANSITIONS=278} [2022-10-17 10:44:44,441 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 70 predicate places. [2022-10-17 10:44:44,442 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 278 transitions, 1024 flow [2022-10-17 10:44:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:44,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:44,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:44,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:44:44,443 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2024776925, now seen corresponding path program 3 times [2022-10-17 10:44:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:44,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821008511] [2022-10-17 10:44:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:44,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:44,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821008511] [2022-10-17 10:44:44,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821008511] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:44,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:44,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:44,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102619217] [2022-10-17 10:44:44,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:44,753 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:44,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 278 transitions, 1024 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:44,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:44,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:44,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:45,352 INFO L130 PetriNetUnfolder]: 187/1944 cut-off events. [2022-10-17 10:44:45,353 INFO L131 PetriNetUnfolder]: For 1839/1941 co-relation queries the response was YES. [2022-10-17 10:44:45,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1944 events. 187/1944 cut-off events. For 1839/1941 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 15547 event pairs, 58 based on Foata normal form. 6/1878 useless extension candidates. Maximal degree in co-relation 4122. Up to 664 conditions per place. [2022-10-17 10:44:45,380 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 91 selfloop transitions, 10 changer transitions 21/309 dead transitions. [2022-10-17 10:44:45,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 309 transitions, 1525 flow [2022-10-17 10:44:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:44:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-10-17 10:44:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2061 transitions. [2022-10-17 10:44:45,385 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.761640798226164 [2022-10-17 10:44:45,386 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2061 transitions. [2022-10-17 10:44:45,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2061 transitions. [2022-10-17 10:44:45,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:45,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2061 transitions. [2022-10-17 10:44:45,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.36363636363637) internal successors, (2061), 11 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:45,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:45,400 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:45,400 INFO L175 Difference]: Start difference. First operand has 287 places, 278 transitions, 1024 flow. Second operand 11 states and 2061 transitions. [2022-10-17 10:44:45,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 309 transitions, 1525 flow [2022-10-17 10:44:45,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 309 transitions, 1454 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-10-17 10:44:45,428 INFO L231 Difference]: Finished difference. Result has 294 places, 284 transitions, 1099 flow [2022-10-17 10:44:45,429 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1099, PETRI_PLACES=294, PETRI_TRANSITIONS=284} [2022-10-17 10:44:45,429 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 77 predicate places. [2022-10-17 10:44:45,429 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 284 transitions, 1099 flow [2022-10-17 10:44:45,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:45,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:45,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:45,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:44:45,431 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1285741767, now seen corresponding path program 4 times [2022-10-17 10:44:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856999523] [2022-10-17 10:44:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:45,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:45,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856999523] [2022-10-17 10:44:45,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856999523] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:45,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:45,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:45,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028437971] [2022-10-17 10:44:45,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:45,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:45,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:45,691 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:45,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 284 transitions, 1099 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:45,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:45,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:45,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:46,278 INFO L130 PetriNetUnfolder]: 184/1909 cut-off events. [2022-10-17 10:44:46,278 INFO L131 PetriNetUnfolder]: For 1900/2047 co-relation queries the response was YES. [2022-10-17 10:44:46,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4087 conditions, 1909 events. 184/1909 cut-off events. For 1900/2047 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 15173 event pairs, 63 based on Foata normal form. 3/1838 useless extension candidates. Maximal degree in co-relation 4042. Up to 571 conditions per place. [2022-10-17 10:44:46,304 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 101 selfloop transitions, 12 changer transitions 23/323 dead transitions. [2022-10-17 10:44:46,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 323 transitions, 1591 flow [2022-10-17 10:44:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:44:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-10-17 10:44:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2440 transitions. [2022-10-17 10:44:46,310 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7629768605378362 [2022-10-17 10:44:46,310 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2440 transitions. [2022-10-17 10:44:46,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2440 transitions. [2022-10-17 10:44:46,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:46,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2440 transitions. [2022-10-17 10:44:46,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.69230769230768) internal successors, (2440), 13 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:46,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:46,323 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:46,323 INFO L175 Difference]: Start difference. First operand has 294 places, 284 transitions, 1099 flow. Second operand 13 states and 2440 transitions. [2022-10-17 10:44:46,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 323 transitions, 1591 flow [2022-10-17 10:44:46,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 323 transitions, 1493 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-10-17 10:44:46,350 INFO L231 Difference]: Finished difference. Result has 303 places, 284 transitions, 1103 flow [2022-10-17 10:44:46,351 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1103, PETRI_PLACES=303, PETRI_TRANSITIONS=284} [2022-10-17 10:44:46,352 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 86 predicate places. [2022-10-17 10:44:46,352 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 284 transitions, 1103 flow [2022-10-17 10:44:46,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:46,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:46,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:46,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:44:46,353 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash -80180503, now seen corresponding path program 5 times [2022-10-17 10:44:46,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:46,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096119721] [2022-10-17 10:44:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:46,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:46,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096119721] [2022-10-17 10:44:46,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096119721] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:46,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:46,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:46,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695830791] [2022-10-17 10:44:46,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:46,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:46,631 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:46,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 284 transitions, 1103 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:46,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:46,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:46,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:47,141 INFO L130 PetriNetUnfolder]: 169/1896 cut-off events. [2022-10-17 10:44:47,142 INFO L131 PetriNetUnfolder]: For 1949/2063 co-relation queries the response was YES. [2022-10-17 10:44:47,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3982 conditions, 1896 events. 169/1896 cut-off events. For 1949/2063 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 15071 event pairs, 57 based on Foata normal form. 12/1837 useless extension candidates. Maximal degree in co-relation 3934. Up to 637 conditions per place. [2022-10-17 10:44:47,161 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 86 selfloop transitions, 3 changer transitions 23/299 dead transitions. [2022-10-17 10:44:47,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 299 transitions, 1426 flow [2022-10-17 10:44:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:44:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-10-17 10:44:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2240 transitions. [2022-10-17 10:44:47,166 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7588075880758808 [2022-10-17 10:44:47,167 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2240 transitions. [2022-10-17 10:44:47,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2240 transitions. [2022-10-17 10:44:47,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:47,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2240 transitions. [2022-10-17 10:44:47,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.66666666666666) internal successors, (2240), 12 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,179 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,179 INFO L175 Difference]: Start difference. First operand has 303 places, 284 transitions, 1103 flow. Second operand 12 states and 2240 transitions. [2022-10-17 10:44:47,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 299 transitions, 1426 flow [2022-10-17 10:44:47,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 299 transitions, 1339 flow, removed 23 selfloop flow, removed 12 redundant places. [2022-10-17 10:44:47,202 INFO L231 Difference]: Finished difference. Result has 298 places, 273 transitions, 952 flow [2022-10-17 10:44:47,203 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=952, PETRI_PLACES=298, PETRI_TRANSITIONS=273} [2022-10-17 10:44:47,204 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 81 predicate places. [2022-10-17 10:44:47,204 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 273 transitions, 952 flow [2022-10-17 10:44:47,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:47,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:47,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:44:47,205 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:47,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:47,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1340479329, now seen corresponding path program 6 times [2022-10-17 10:44:47,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:47,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680505463] [2022-10-17 10:44:47,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:47,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:47,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:47,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680505463] [2022-10-17 10:44:47,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680505463] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:47,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:47,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:47,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528340990] [2022-10-17 10:44:47,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:47,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:47,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:47,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:47,436 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:47,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 273 transitions, 952 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:47,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:47,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:47,941 INFO L130 PetriNetUnfolder]: 148/1681 cut-off events. [2022-10-17 10:44:47,941 INFO L131 PetriNetUnfolder]: For 1121/1211 co-relation queries the response was YES. [2022-10-17 10:44:47,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 1681 events. 148/1681 cut-off events. For 1121/1211 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 12714 event pairs, 54 based on Foata normal form. 3/1616 useless extension candidates. Maximal degree in co-relation 3272. Up to 550 conditions per place. [2022-10-17 10:44:47,953 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 72 selfloop transitions, 2 changer transitions 24/282 dead transitions. [2022-10-17 10:44:47,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 282 transitions, 1186 flow [2022-10-17 10:44:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:44:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-10-17 10:44:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2235 transitions. [2022-10-17 10:44:47,957 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7571138211382114 [2022-10-17 10:44:47,957 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2235 transitions. [2022-10-17 10:44:47,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2235 transitions. [2022-10-17 10:44:47,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:47,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2235 transitions. [2022-10-17 10:44:47,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.25) internal successors, (2235), 12 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,970 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,970 INFO L175 Difference]: Start difference. First operand has 298 places, 273 transitions, 952 flow. Second operand 12 states and 2235 transitions. [2022-10-17 10:44:47,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 282 transitions, 1186 flow [2022-10-17 10:44:47,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 282 transitions, 1125 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-10-17 10:44:47,986 INFO L231 Difference]: Finished difference. Result has 287 places, 258 transitions, 820 flow [2022-10-17 10:44:47,986 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=820, PETRI_PLACES=287, PETRI_TRANSITIONS=258} [2022-10-17 10:44:47,987 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 70 predicate places. [2022-10-17 10:44:47,987 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 258 transitions, 820 flow [2022-10-17 10:44:47,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:47,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:47,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:44:47,988 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 613945697, now seen corresponding path program 3 times [2022-10-17 10:44:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:47,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74483477] [2022-10-17 10:44:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:48,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:48,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74483477] [2022-10-17 10:44:48,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74483477] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:48,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:48,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:48,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244044343] [2022-10-17 10:44:48,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:48,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:48,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:48,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:48,208 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:48,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 258 transitions, 820 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:48,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:48,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:48,692 INFO L130 PetriNetUnfolder]: 157/1718 cut-off events. [2022-10-17 10:44:48,692 INFO L131 PetriNetUnfolder]: For 975/1053 co-relation queries the response was YES. [2022-10-17 10:44:48,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3308 conditions, 1718 events. 157/1718 cut-off events. For 975/1053 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 13032 event pairs, 43 based on Foata normal form. 3/1654 useless extension candidates. Maximal degree in co-relation 3272. Up to 517 conditions per place. [2022-10-17 10:44:48,715 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 81 selfloop transitions, 10 changer transitions 22/297 dead transitions. [2022-10-17 10:44:48,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 297 transitions, 1241 flow [2022-10-17 10:44:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:44:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-10-17 10:44:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2066 transitions. [2022-10-17 10:44:48,719 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7634885439763488 [2022-10-17 10:44:48,719 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2066 transitions. [2022-10-17 10:44:48,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2066 transitions. [2022-10-17 10:44:48,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:48,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2066 transitions. [2022-10-17 10:44:48,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.8181818181818) internal successors, (2066), 11 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:48,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:48,770 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:48,771 INFO L175 Difference]: Start difference. First operand has 287 places, 258 transitions, 820 flow. Second operand 11 states and 2066 transitions. [2022-10-17 10:44:48,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 297 transitions, 1241 flow [2022-10-17 10:44:48,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 297 transitions, 1205 flow, removed 9 selfloop flow, removed 11 redundant places. [2022-10-17 10:44:48,785 INFO L231 Difference]: Finished difference. Result has 278 places, 266 transitions, 896 flow [2022-10-17 10:44:48,786 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=896, PETRI_PLACES=278, PETRI_TRANSITIONS=266} [2022-10-17 10:44:48,786 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 61 predicate places. [2022-10-17 10:44:48,786 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 266 transitions, 896 flow [2022-10-17 10:44:48,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:48,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:48,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:48,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:44:48,787 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:48,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash 20451773, now seen corresponding path program 4 times [2022-10-17 10:44:48,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:48,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021611130] [2022-10-17 10:44:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:49,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021611130] [2022-10-17 10:44:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021611130] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:49,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:49,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:49,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885032732] [2022-10-17 10:44:49,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:49,062 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:49,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 266 transitions, 896 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:49,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:49,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:49,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:49,557 INFO L130 PetriNetUnfolder]: 148/1714 cut-off events. [2022-10-17 10:44:49,557 INFO L131 PetriNetUnfolder]: For 1217/1304 co-relation queries the response was YES. [2022-10-17 10:44:49,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1714 events. 148/1714 cut-off events. For 1217/1304 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 13063 event pairs, 36 based on Foata normal form. 3/1655 useless extension candidates. Maximal degree in co-relation 3386. Up to 529 conditions per place. [2022-10-17 10:44:49,575 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 82 selfloop transitions, 10 changer transitions 25/301 dead transitions. [2022-10-17 10:44:49,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 301 transitions, 1357 flow [2022-10-17 10:44:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:44:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-10-17 10:44:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2062 transitions. [2022-10-17 10:44:49,580 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.762010347376201 [2022-10-17 10:44:49,580 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2062 transitions. [2022-10-17 10:44:49,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2062 transitions. [2022-10-17 10:44:49,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:49,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2062 transitions. [2022-10-17 10:44:49,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.45454545454547) internal successors, (2062), 11 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:49,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:49,592 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:49,592 INFO L175 Difference]: Start difference. First operand has 278 places, 266 transitions, 896 flow. Second operand 11 states and 2062 transitions. [2022-10-17 10:44:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 301 transitions, 1357 flow [2022-10-17 10:44:49,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 301 transitions, 1318 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-10-17 10:44:49,609 INFO L231 Difference]: Finished difference. Result has 285 places, 272 transitions, 989 flow [2022-10-17 10:44:49,610 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=989, PETRI_PLACES=285, PETRI_TRANSITIONS=272} [2022-10-17 10:44:49,610 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 68 predicate places. [2022-10-17 10:44:49,610 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 272 transitions, 989 flow [2022-10-17 10:44:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:49,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-17 10:44:49,612 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash -85845529, now seen corresponding path program 5 times [2022-10-17 10:44:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:49,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647263484] [2022-10-17 10:44:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:49,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647263484] [2022-10-17 10:44:49,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647263484] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:49,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970197744] [2022-10-17 10:44:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:49,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:49,854 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:49,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 272 transitions, 989 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:49,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:49,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:50,331 INFO L130 PetriNetUnfolder]: 136/1686 cut-off events. [2022-10-17 10:44:50,332 INFO L131 PetriNetUnfolder]: For 1341/1431 co-relation queries the response was YES. [2022-10-17 10:44:50,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1686 events. 136/1686 cut-off events. For 1341/1431 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12867 event pairs, 33 based on Foata normal form. 12/1639 useless extension candidates. Maximal degree in co-relation 3308. Up to 502 conditions per place. [2022-10-17 10:44:50,347 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 77 selfloop transitions, 3 changer transitions 27/291 dead transitions. [2022-10-17 10:44:50,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 291 transitions, 1297 flow [2022-10-17 10:44:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:44:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-10-17 10:44:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2241 transitions. [2022-10-17 10:44:50,353 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7591463414634146 [2022-10-17 10:44:50,353 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2241 transitions. [2022-10-17 10:44:50,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2241 transitions. [2022-10-17 10:44:50,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:50,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2241 transitions. [2022-10-17 10:44:50,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.75) internal successors, (2241), 12 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:50,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:50,368 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:50,368 INFO L175 Difference]: Start difference. First operand has 285 places, 272 transitions, 989 flow. Second operand 12 states and 2241 transitions. [2022-10-17 10:44:50,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 291 transitions, 1297 flow [2022-10-17 10:44:50,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 291 transitions, 1252 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-10-17 10:44:50,389 INFO L231 Difference]: Finished difference. Result has 289 places, 261 transitions, 863 flow [2022-10-17 10:44:50,390 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=863, PETRI_PLACES=289, PETRI_TRANSITIONS=261} [2022-10-17 10:44:50,391 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 72 predicate places. [2022-10-17 10:44:50,391 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 261 transitions, 863 flow [2022-10-17 10:44:50,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:50,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:50,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:50,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-17 10:44:50,392 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:50,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1216981687, now seen corresponding path program 6 times [2022-10-17 10:44:50,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:50,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647238229] [2022-10-17 10:44:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:50,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647238229] [2022-10-17 10:44:50,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647238229] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:50,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:44:50,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:44:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334986091] [2022-10-17 10:44:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:50,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:44:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:44:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:44:50,618 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-10-17 10:44:50,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 261 transitions, 863 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:50,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:50,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-10-17 10:44:50,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:51,123 INFO L130 PetriNetUnfolder]: 115/1471 cut-off events. [2022-10-17 10:44:51,124 INFO L131 PetriNetUnfolder]: For 843/903 co-relation queries the response was YES. [2022-10-17 10:44:51,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2757 conditions, 1471 events. 115/1471 cut-off events. For 843/903 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10395 event pairs, 30 based on Foata normal form. 3/1418 useless extension candidates. Maximal degree in co-relation 2718. Up to 415 conditions per place. [2022-10-17 10:44:51,139 INFO L137 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 0 changer transitions 44/274 dead transitions. [2022-10-17 10:44:51,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 274 transitions, 1095 flow [2022-10-17 10:44:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:44:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-10-17 10:44:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2236 transitions. [2022-10-17 10:44:51,144 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7574525745257452 [2022-10-17 10:44:51,144 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2236 transitions. [2022-10-17 10:44:51,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2236 transitions. [2022-10-17 10:44:51,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:51,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2236 transitions. [2022-10-17 10:44:51,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.33333333333334) internal successors, (2236), 12 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:51,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:51,157 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:51,158 INFO L175 Difference]: Start difference. First operand has 289 places, 261 transitions, 863 flow. Second operand 12 states and 2236 transitions. [2022-10-17 10:44:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 274 transitions, 1095 flow [2022-10-17 10:44:51,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 274 transitions, 1034 flow, removed 16 selfloop flow, removed 14 redundant places. [2022-10-17 10:44:51,172 INFO L231 Difference]: Finished difference. Result has 277 places, 230 transitions, 631 flow [2022-10-17 10:44:51,172 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=631, PETRI_PLACES=277, PETRI_TRANSITIONS=230} [2022-10-17 10:44:51,173 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 60 predicate places. [2022-10-17 10:44:51,173 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 230 transitions, 631 flow [2022-10-17 10:44:51,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:51,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:51,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:51,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-10-17 10:44:51,174 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash 104352332, now seen corresponding path program 1 times [2022-10-17 10:44:51,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:51,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653042289] [2022-10-17 10:44:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:51,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:51,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653042289] [2022-10-17 10:44:51,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653042289] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:44:51,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885410734] [2022-10-17 10:44:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:51,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:44:51,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:44:51,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:44:51,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:44:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:44:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:44:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:52,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:44:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:52,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885410734] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:44:52,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:44:52,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-10-17 10:44:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692819344] [2022-10-17 10:44:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:52,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:44:52,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:44:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-10-17 10:44:52,868 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-10-17 10:44:52,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 230 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:52,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:52,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-10-17 10:44:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:53,868 INFO L130 PetriNetUnfolder]: 200/1818 cut-off events. [2022-10-17 10:44:53,868 INFO L131 PetriNetUnfolder]: For 653/666 co-relation queries the response was YES. [2022-10-17 10:44:53,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1818 events. 200/1818 cut-off events. For 653/666 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 13479 event pairs, 83 based on Foata normal form. 6/1684 useless extension candidates. Maximal degree in co-relation 3036. Up to 224 conditions per place. [2022-10-17 10:44:53,883 INFO L137 encePairwiseOnDemand]: 226/246 looper letters, 144 selfloop transitions, 22 changer transitions 7/312 dead transitions. [2022-10-17 10:44:53,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 312 transitions, 1225 flow [2022-10-17 10:44:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 10:44:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-10-17 10:44:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3340 transitions. [2022-10-17 10:44:53,892 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2022-10-17 10:44:53,893 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3340 transitions. [2022-10-17 10:44:53,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3340 transitions. [2022-10-17 10:44:53,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:53,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3340 transitions. [2022-10-17 10:44:53,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.0) internal successors, (3340), 20 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:53,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:53,913 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:53,913 INFO L175 Difference]: Start difference. First operand has 277 places, 230 transitions, 631 flow. Second operand 20 states and 3340 transitions. [2022-10-17 10:44:53,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 312 transitions, 1225 flow [2022-10-17 10:44:53,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 312 transitions, 1197 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-10-17 10:44:53,927 INFO L231 Difference]: Finished difference. Result has 266 places, 236 transitions, 725 flow [2022-10-17 10:44:53,928 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=266, PETRI_TRANSITIONS=236} [2022-10-17 10:44:53,929 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 49 predicate places. [2022-10-17 10:44:53,929 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 236 transitions, 725 flow [2022-10-17 10:44:53,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:53,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:53,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:53,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:44:54,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-10-17 10:44:54,157 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:54,158 INFO L85 PathProgramCache]: Analyzing trace with hash 659570956, now seen corresponding path program 2 times [2022-10-17 10:44:54,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:54,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903520436] [2022-10-17 10:44:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:44:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:44:54,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:44:54,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903520436] [2022-10-17 10:44:54,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903520436] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:44:54,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445698127] [2022-10-17 10:44:54,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:44:54,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:44:54,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:44:54,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:44:54,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:44:54,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:44:54,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:44:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 10:44:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:44:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:44:55,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:44:55,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445698127] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:44:55,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:44:55,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 28 [2022-10-17 10:44:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527163624] [2022-10-17 10:44:55,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:44:55,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:44:55,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:44:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:44:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:44:55,553 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-10-17 10:44:55,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 236 transitions, 725 flow. Second operand has 18 states, 18 states have (on average 162.22222222222223) internal successors, (2920), 18 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:55,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:44:55,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-10-17 10:44:55,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:44:57,279 INFO L130 PetriNetUnfolder]: 203/1907 cut-off events. [2022-10-17 10:44:57,279 INFO L131 PetriNetUnfolder]: For 1027/1047 co-relation queries the response was YES. [2022-10-17 10:44:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 1907 events. 203/1907 cut-off events. For 1027/1047 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14491 event pairs, 62 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 3297. Up to 213 conditions per place. [2022-10-17 10:44:57,298 INFO L137 encePairwiseOnDemand]: 218/246 looper letters, 115 selfloop transitions, 33 changer transitions 17/304 dead transitions. [2022-10-17 10:44:57,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 304 transitions, 1278 flow [2022-10-17 10:44:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-10-17 10:44:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-10-17 10:44:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4439 transitions. [2022-10-17 10:44:57,310 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6683227943390545 [2022-10-17 10:44:57,310 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4439 transitions. [2022-10-17 10:44:57,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4439 transitions. [2022-10-17 10:44:57,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:44:57,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4439 transitions. [2022-10-17 10:44:57,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 164.40740740740742) internal successors, (4439), 27 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:57,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 246.0) internal successors, (6888), 28 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:57,335 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 246.0) internal successors, (6888), 28 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:57,336 INFO L175 Difference]: Start difference. First operand has 266 places, 236 transitions, 725 flow. Second operand 27 states and 4439 transitions. [2022-10-17 10:44:57,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 304 transitions, 1278 flow [2022-10-17 10:44:57,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 304 transitions, 1223 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-10-17 10:44:57,350 INFO L231 Difference]: Finished difference. Result has 285 places, 251 transitions, 855 flow [2022-10-17 10:44:57,350 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=855, PETRI_PLACES=285, PETRI_TRANSITIONS=251} [2022-10-17 10:44:57,352 INFO L287 CegarLoopForPetriNet]: 217 programPoint places, 68 predicate places. [2022-10-17 10:44:57,352 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 251 transitions, 855 flow [2022-10-17 10:44:57,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.22222222222223) internal successors, (2920), 18 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:44:57,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:44:57,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:44:57,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:44:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d26243-7074-40ea-99cc-ef2f426fbd9e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-10-17 10:44:57,569 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-10-17 10:44:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:44:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash 102062331, now seen corresponding path program 1 times [2022-10-17 10:44:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:44:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549368629] [2022-10-17 10:44:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:44:57,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:44:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat