./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i --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_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/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_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/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_62396d48-ebb7-4827-8fe2-c917aff4da76/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 32482febe38d61a93fd0705f3ad97c9c1ccc991b1238f75e4d1dd99bfb01c35e --- 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 10:23:14,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:23:14,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:23:14,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:23:14,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:23:14,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:23:14,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:23:14,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:23:14,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:23:14,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:23:14,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:23:14,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:23:14,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:23:14,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:23:14,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:23:14,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:23:14,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:23:14,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:23:14,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:23:14,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:23:14,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:23:14,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:23:14,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:23:14,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:23:14,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:23:14,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:23:14,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:23:14,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:23:14,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:23:14,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:23:14,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:23:14,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:23:14,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:23:14,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:23:14,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:23:14,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:23:14,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:23:14,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:23:14,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:23:14,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:23:14,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:23:14,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:23:14,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:23:14,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:23:14,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:23:14,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:23:14,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:23:14,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:23:14,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:23:14,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:23:14,282 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:23:14,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:23:14,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:23:14,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:23:14,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:23:14,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:23:14,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:23:14,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:23:14,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:23:14,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:23:14,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:23:14,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:23:14,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:23:14,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:23:14,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:23:14,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:23:14,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:23:14,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:23:14,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:23:14,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:23:14,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:23:14,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:23:14,287 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:23:14,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:23:14,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:23:14,288 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_62396d48-ebb7-4827-8fe2-c917aff4da76/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32482febe38d61a93fd0705f3ad97c9c1ccc991b1238f75e4d1dd99bfb01c35e [2022-10-17 10:23:14,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:23:14,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:23:14,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:23:14,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:23:14,632 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:23:14,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i [2022-10-17 10:23:14,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/data/2298a1cbc/ad1120dcd8154ab892e313359e0c148b/FLAG1f5d9d19f [2022-10-17 10:23:15,272 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:23:15,273 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i [2022-10-17 10:23:15,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/data/2298a1cbc/ad1120dcd8154ab892e313359e0c148b/FLAG1f5d9d19f [2022-10-17 10:23:15,534 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/data/2298a1cbc/ad1120dcd8154ab892e313359e0c148b [2022-10-17 10:23:15,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:23:15,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:23:15,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:23:15,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:23:15,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:23:15,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:23:15" (1/1) ... [2022-10-17 10:23:15,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43370b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:15, skipping insertion in model container [2022-10-17 10:23:15,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:23:15" (1/1) ... [2022-10-17 10:23:15,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:23:15,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:23:15,799 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:23:16,185 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[47275,47288] [2022-10-17 10:23:16,192 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[47463,47476] [2022-10-17 10:23:16,215 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48230,48243] [2022-10-17 10:23:16,217 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48344,48357] [2022-10-17 10:23:16,231 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48816,48829] [2022-10-17 10:23:16,233 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48872,48885] [2022-10-17 10:23:16,252 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[49384,49397] [2022-10-17 10:23:16,254 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[49443,49456] [2022-10-17 10:23:16,256 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[49522,49535] [2022-10-17 10:23:16,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:23:16,267 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:23:16,288 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:23:16,313 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[47275,47288] [2022-10-17 10:23:16,314 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[47463,47476] [2022-10-17 10:23:16,320 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48230,48243] [2022-10-17 10:23:16,321 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48344,48357] [2022-10-17 10:23:16,324 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48816,48829] [2022-10-17 10:23:16,325 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[48872,48885] [2022-10-17 10:23:16,329 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[49384,49397] [2022-10-17 10:23:16,329 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[49443,49456] [2022-10-17 10:23:16,330 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_62396d48-ebb7-4827-8fe2-c917aff4da76/sv-benchmarks/c/pthread-divine/divinefifo-bug_1w1r.i[49522,49535] [2022-10-17 10:23:16,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:23:16,389 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:23:16,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16 WrapperNode [2022-10-17 10:23:16,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:23:16,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:23:16,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:23:16,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:23:16,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,502 INFO L138 Inliner]: procedures = 278, calls = 103, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 416 [2022-10-17 10:23:16,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:23:16,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:23:16,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:23:16,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:23:16,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,570 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:23:16,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:23:16,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:23:16,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:23:16,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (1/1) ... [2022-10-17 10:23:16,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:23:16,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:16,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:23:16,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62396d48-ebb7-4827-8fe2-c917aff4da76/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:23:16,698 INFO L130 BoogieDeclarations]: Found specification of procedure pusher [2022-10-17 10:23:16,699 INFO L138 BoogieDeclarations]: Found implementation of procedure pusher [2022-10-17 10:23:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:23:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:23:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:23:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:23:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:23:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:23:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:23:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:23:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:23:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:23:16,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:23:16,702 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 10:23:16,938 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:23:16,956 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:23:17,874 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:23:17,902 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:23:17,904 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 10:23:17,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:23:17 BoogieIcfgContainer [2022-10-17 10:23:17,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:23:17,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:23:17,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:23:17,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:23:17,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:23:15" (1/3) ... [2022-10-17 10:23:17,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d17c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:23:17, skipping insertion in model container [2022-10-17 10:23:17,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:16" (2/3) ... [2022-10-17 10:23:17,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d17c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:23:17, skipping insertion in model container [2022-10-17 10:23:17,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:23:17" (3/3) ... [2022-10-17 10:23:17,925 INFO L112 eAbstractionObserver]: Analyzing ICFG divinefifo-bug_1w1r.i [2022-10-17 10:23:17,937 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:23:17,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:23:17,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-10-17 10:23:17,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:23:18,078 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-10-17 10:23:18,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 478 places, 507 transitions, 1022 flow [2022-10-17 10:23:18,411 INFO L130 PetriNetUnfolder]: 33/506 cut-off events. [2022-10-17 10:23:18,411 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:23:18,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 506 events. 33/506 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1167 event pairs, 0 based on Foata normal form. 0/462 useless extension candidates. Maximal degree in co-relation 352. Up to 3 conditions per place. [2022-10-17 10:23:18,426 INFO L82 GeneralOperation]: Start removeDead. Operand has 478 places, 507 transitions, 1022 flow [2022-10-17 10:23:18,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 459 places, 487 transitions, 980 flow [2022-10-17 10:23:18,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:23:18,458 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;@55ce9443, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:23:18,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-10-17 10:23:18,471 INFO L130 PetriNetUnfolder]: 2/70 cut-off events. [2022-10-17 10:23:18,472 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:23:18,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:18,473 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] [2022-10-17 10:23:18,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1954338316, now seen corresponding path program 1 times [2022-10-17 10:23:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:18,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812532034] [2022-10-17 10:23:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:19,969 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 10:23:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:19,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812532034] [2022-10-17 10:23:19,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812532034] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:19,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:19,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 10:23:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028480196] [2022-10-17 10:23:19,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:23:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:23:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:23:20,029 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 507 [2022-10-17 10:23:20,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 487 transitions, 980 flow. Second operand has 12 states, 12 states have (on average 315.9166666666667) internal successors, (3791), 12 states have internal predecessors, (3791), 0 states have call successors, (0), 0 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 10:23:20,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:23:20,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 507 [2022-10-17 10:23:20,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:23:22,862 INFO L130 PetriNetUnfolder]: 1991/7285 cut-off events. [2022-10-17 10:23:22,863 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-10-17 10:23:22,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10818 conditions, 7285 events. 1991/7285 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 61992 event pairs, 1183 based on Foata normal form. 432/7200 useless extension candidates. Maximal degree in co-relation 10622. Up to 2824 conditions per place. [2022-10-17 10:23:22,920 INFO L137 encePairwiseOnDemand]: 468/507 looper letters, 166 selfloop transitions, 24 changer transitions 0/487 dead transitions. [2022-10-17 10:23:22,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 487 transitions, 1360 flow [2022-10-17 10:23:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:23:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-10-17 10:23:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4602 transitions. [2022-10-17 10:23:22,957 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6483516483516484 [2022-10-17 10:23:22,958 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4602 transitions. [2022-10-17 10:23:22,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4602 transitions. [2022-10-17 10:23:22,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:23:22,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4602 transitions. [2022-10-17 10:23:22,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 328.7142857142857) internal successors, (4602), 14 states have internal predecessors, (4602), 0 states have call successors, (0), 0 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 10:23:23,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 507.0) internal successors, (7605), 15 states have internal predecessors, (7605), 0 states have call successors, (0), 0 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 10:23:23,029 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 507.0) internal successors, (7605), 15 states have internal predecessors, (7605), 0 states have call successors, (0), 0 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 10:23:23,032 INFO L175 Difference]: Start difference. First operand has 459 places, 487 transitions, 980 flow. Second operand 14 states and 4602 transitions. [2022-10-17 10:23:23,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 487 transitions, 1360 flow [2022-10-17 10:23:23,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 487 transitions, 1356 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:23:23,063 INFO L231 Difference]: Finished difference. Result has 470 places, 472 transitions, 994 flow [2022-10-17 10:23:23,066 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=994, PETRI_PLACES=470, PETRI_TRANSITIONS=472} [2022-10-17 10:23:23,070 INFO L287 CegarLoopForPetriNet]: 459 programPoint places, 11 predicate places. [2022-10-17 10:23:23,070 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 472 transitions, 994 flow [2022-10-17 10:23:23,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 315.9166666666667) internal successors, (3791), 12 states have internal predecessors, (3791), 0 states have call successors, (0), 0 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 10:23:23,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:23,078 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] [2022-10-17 10:23:23,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:23:23,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1408163568, now seen corresponding path program 1 times [2022-10-17 10:23:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401236651] [2022-10-17 10:23:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:23,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:25,705 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 10:23:25,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:25,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401236651] [2022-10-17 10:23:25,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401236651] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:25,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:25,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-10-17 10:23:25,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680709377] [2022-10-17 10:23:25,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:25,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 10:23:25,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 10:23:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:23:25,721 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 507 [2022-10-17 10:23:25,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 472 transitions, 994 flow. Second operand has 22 states, 22 states have (on average 269.95454545454544) internal successors, (5939), 22 states have internal predecessors, (5939), 0 states have call successors, (0), 0 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 10:23:25,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:23:25,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 507 [2022-10-17 10:23:25,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:23:32,652 INFO L130 PetriNetUnfolder]: 4756/14876 cut-off events. [2022-10-17 10:23:32,652 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-10-17 10:23:32,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23924 conditions, 14876 events. 4756/14876 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 134530 event pairs, 168 based on Foata normal form. 0/14155 useless extension candidates. Maximal degree in co-relation 20413. Up to 3612 conditions per place. [2022-10-17 10:23:32,777 INFO L137 encePairwiseOnDemand]: 462/507 looper letters, 387 selfloop transitions, 54 changer transitions 0/694 dead transitions. [2022-10-17 10:23:32,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 694 transitions, 2341 flow [2022-10-17 10:23:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-17 10:23:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-10-17 10:23:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 9018 transitions. [2022-10-17 10:23:32,808 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5558431952662722 [2022-10-17 10:23:32,809 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 9018 transitions. [2022-10-17 10:23:32,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 9018 transitions. [2022-10-17 10:23:32,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:23:32,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 9018 transitions. [2022-10-17 10:23:32,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 281.8125) internal successors, (9018), 32 states have internal predecessors, (9018), 0 states have call successors, (0), 0 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 10:23:32,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 507.0) internal successors, (16731), 33 states have internal predecessors, (16731), 0 states have call successors, (0), 0 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 10:23:32,895 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 507.0) internal successors, (16731), 33 states have internal predecessors, (16731), 0 states have call successors, (0), 0 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 10:23:32,896 INFO L175 Difference]: Start difference. First operand has 470 places, 472 transitions, 994 flow. Second operand 32 states and 9018 transitions. [2022-10-17 10:23:32,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 694 transitions, 2341 flow [2022-10-17 10:23:32,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 694 transitions, 2273 flow, removed 0 selfloop flow, removed 13 redundant places. [2022-10-17 10:23:32,934 INFO L231 Difference]: Finished difference. Result has 488 places, 487 transitions, 1119 flow [2022-10-17 10:23:32,935 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1119, PETRI_PLACES=488, PETRI_TRANSITIONS=487} [2022-10-17 10:23:32,936 INFO L287 CegarLoopForPetriNet]: 459 programPoint places, 29 predicate places. [2022-10-17 10:23:32,937 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 487 transitions, 1119 flow [2022-10-17 10:23:32,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 269.95454545454544) internal successors, (5939), 22 states have internal predecessors, (5939), 0 states have call successors, (0), 0 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 10:23:32,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:32,957 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] [2022-10-17 10:23:32,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:23:32,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1612565280, now seen corresponding path program 1 times [2022-10-17 10:23:32,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:32,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620292296] [2022-10-17 10:23:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:32,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:33,149 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 10:23:33,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:33,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620292296] [2022-10-17 10:23:33,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620292296] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:33,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:33,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:23:33,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74314309] [2022-10-17 10:23:33,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:23:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:33,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:23:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:33,158 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 479 out of 507 [2022-10-17 10:23:33,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 487 transitions, 1119 flow. Second operand has 5 states, 5 states have (on average 480.6) internal successors, (2403), 5 states have internal predecessors, (2403), 0 states have call successors, (0), 0 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 10:23:33,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:23:33,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 479 of 507 [2022-10-17 10:23:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:23:33,388 INFO L130 PetriNetUnfolder]: 31/902 cut-off events. [2022-10-17 10:23:33,388 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-10-17 10:23:33,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 902 events. 31/902 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2312 event pairs, 0 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 658. Up to 18 conditions per place. [2022-10-17 10:23:33,409 INFO L137 encePairwiseOnDemand]: 499/507 looper letters, 8 selfloop transitions, 7 changer transitions 0/488 dead transitions. [2022-10-17 10:23:33,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 488 transitions, 1148 flow [2022-10-17 10:23:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:23:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:23:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2411 transitions. [2022-10-17 10:23:33,418 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9510848126232742 [2022-10-17 10:23:33,418 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2411 transitions. [2022-10-17 10:23:33,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2411 transitions. [2022-10-17 10:23:33,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:23:33,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2411 transitions. [2022-10-17 10:23:33,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 482.2) internal successors, (2411), 5 states have internal predecessors, (2411), 0 states have call successors, (0), 0 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 10:23:33,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 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 10:23:33,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 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 10:23:33,436 INFO L175 Difference]: Start difference. First operand has 488 places, 487 transitions, 1119 flow. Second operand 5 states and 2411 transitions. [2022-10-17 10:23:33,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 488 transitions, 1148 flow [2022-10-17 10:23:33,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 488 transitions, 1093 flow, removed 1 selfloop flow, removed 26 redundant places. [2022-10-17 10:23:33,452 INFO L231 Difference]: Finished difference. Result has 468 places, 487 transitions, 1085 flow [2022-10-17 10:23:33,453 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1085, PETRI_PLACES=468, PETRI_TRANSITIONS=487} [2022-10-17 10:23:33,456 INFO L287 CegarLoopForPetriNet]: 459 programPoint places, 9 predicate places. [2022-10-17 10:23:33,456 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 487 transitions, 1085 flow [2022-10-17 10:23:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 480.6) internal successors, (2403), 5 states have internal predecessors, (2403), 0 states have call successors, (0), 0 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 10:23:33,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:33,459 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] [2022-10-17 10:23:33,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:23:33,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash 519425822, now seen corresponding path program 1 times [2022-10-17 10:23:33,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:33,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036563615] [2022-10-17 10:23:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:33,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:33,586 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 10:23:33,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:33,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036563615] [2022-10-17 10:23:33,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036563615] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:33,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:33,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751985226] [2022-10-17 10:23:33,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:33,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:33,594 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 482 out of 507 [2022-10-17 10:23:33,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 487 transitions, 1085 flow. Second operand has 3 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 0 states have call successors, (0), 0 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 10:23:33,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:23:33,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 482 of 507 [2022-10-17 10:23:33,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:23:33,944 INFO L130 PetriNetUnfolder]: 42/1173 cut-off events. [2022-10-17 10:23:33,944 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-10-17 10:23:33,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 1173 events. 42/1173 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3310 event pairs, 1 based on Foata normal form. 0/1118 useless extension candidates. Maximal degree in co-relation 1039. Up to 22 conditions per place. [2022-10-17 10:23:33,970 INFO L137 encePairwiseOnDemand]: 504/507 looper letters, 13 selfloop transitions, 2 changer transitions 0/491 dead transitions. [2022-10-17 10:23:33,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 491 transitions, 1119 flow [2022-10-17 10:23:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:23:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1462 transitions. [2022-10-17 10:23:33,977 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9612097304404996 [2022-10-17 10:23:33,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1462 transitions. [2022-10-17 10:23:33,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1462 transitions. [2022-10-17 10:23:33,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:23:33,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1462 transitions. [2022-10-17 10:23:33,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 487.3333333333333) internal successors, (1462), 3 states have internal predecessors, (1462), 0 states have call successors, (0), 0 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 10:23:33,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 10:23:33,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 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 10:23:33,989 INFO L175 Difference]: Start difference. First operand has 468 places, 487 transitions, 1085 flow. Second operand 3 states and 1462 transitions. [2022-10-17 10:23:33,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 491 transitions, 1119 flow [2022-10-17 10:23:33,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 491 transitions, 1110 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-10-17 10:23:34,003 INFO L231 Difference]: Finished difference. Result has 469 places, 487 transitions, 1082 flow [2022-10-17 10:23:34,005 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1082, PETRI_PLACES=469, PETRI_TRANSITIONS=487} [2022-10-17 10:23:34,006 INFO L287 CegarLoopForPetriNet]: 459 programPoint places, 10 predicate places. [2022-10-17 10:23:34,007 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 487 transitions, 1082 flow [2022-10-17 10:23:34,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 0 states have call successors, (0), 0 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 10:23:34,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:34,008 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] [2022-10-17 10:23:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:23:34,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:34,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2048381946, now seen corresponding path program 1 times [2022-10-17 10:23:34,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:34,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149201535] [2022-10-17 10:23:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:34,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:35,019 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 10:23:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149201535] [2022-10-17 10:23:35,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149201535] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:35,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:35,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-10-17 10:23:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707922616] [2022-10-17 10:23:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:35,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 10:23:35,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 10:23:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:23:35,032 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 507 [2022-10-17 10:23:35,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 487 transitions, 1082 flow. Second operand has 19 states, 19 states have (on average 337.36842105263156) internal successors, (6410), 19 states have internal predecessors, (6410), 0 states have call successors, (0), 0 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 10:23:35,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:23:35,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 507 [2022-10-17 10:23:35,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:23:41,430 INFO L130 PetriNetUnfolder]: 6024/22966 cut-off events. [2022-10-17 10:23:41,430 INFO L131 PetriNetUnfolder]: For 413/413 co-relation queries the response was YES. [2022-10-17 10:23:41,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34725 conditions, 22966 events. 6024/22966 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 220203 event pairs, 1191 based on Foata normal form. 0/21981 useless extension candidates. Maximal degree in co-relation 15339. Up to 5330 conditions per place. [2022-10-17 10:23:41,561 INFO L137 encePairwiseOnDemand]: 475/507 looper letters, 347 selfloop transitions, 44 changer transitions 0/721 dead transitions. [2022-10-17 10:23:41,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 721 transitions, 2341 flow [2022-10-17 10:23:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:23:41,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-10-17 10:23:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 7761 transitions. [2022-10-17 10:23:41,585 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6958041958041958 [2022-10-17 10:23:41,585 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 7761 transitions. [2022-10-17 10:23:41,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 7761 transitions. [2022-10-17 10:23:41,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:23:41,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 7761 transitions. [2022-10-17 10:23:41,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 352.77272727272725) internal successors, (7761), 22 states have internal predecessors, (7761), 0 states have call successors, (0), 0 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 10:23:41,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 0 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 10:23:41,639 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 507.0) internal successors, (11661), 23 states have internal predecessors, (11661), 0 states have call successors, (0), 0 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 10:23:41,639 INFO L175 Difference]: Start difference. First operand has 469 places, 487 transitions, 1082 flow. Second operand 22 states and 7761 transitions. [2022-10-17 10:23:41,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 721 transitions, 2341 flow [2022-10-17 10:23:41,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 721 transitions, 2339 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-10-17 10:23:41,659 INFO L231 Difference]: Finished difference. Result has 497 places, 519 transitions, 1320 flow [2022-10-17 10:23:41,660 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1320, PETRI_PLACES=497, PETRI_TRANSITIONS=519} [2022-10-17 10:23:41,661 INFO L287 CegarLoopForPetriNet]: 459 programPoint places, 38 predicate places. [2022-10-17 10:23:41,661 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 519 transitions, 1320 flow [2022-10-17 10:23:41,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 337.36842105263156) internal successors, (6410), 19 states have internal predecessors, (6410), 0 states have call successors, (0), 0 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 10:23:41,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:41,664 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] [2022-10-17 10:23:41,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:23:41,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1009639929, now seen corresponding path program 1 times [2022-10-17 10:23:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:41,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340202683] [2022-10-17 10:23:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:41,981 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 10:23:41,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340202683] [2022-10-17 10:23:41,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340202683] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:41,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:41,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:23:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58299316] [2022-10-17 10:23:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:41,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:23:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:23:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:41,987 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 507 [2022-10-17 10:23:41,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 519 transitions, 1320 flow. Second operand has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 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 10:23:41,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:23:41,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 507 [2022-10-17 10:23:41,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:23:43,625 INFO L130 PetriNetUnfolder]: 300/5891 cut-off events. [2022-10-17 10:23:43,625 INFO L131 PetriNetUnfolder]: For 205/218 co-relation queries the response was YES. [2022-10-17 10:23:43,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7235 conditions, 5891 events. 300/5891 cut-off events. For 205/218 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 45675 event pairs, 1 based on Foata normal form. 5/5608 useless extension candidates. Maximal degree in co-relation 7036. Up to 366 conditions per place. [2022-10-17 10:23:43,677 INFO L137 encePairwiseOnDemand]: 484/507 looper letters, 76 selfloop transitions, 22 changer transitions 0/543 dead transitions. [2022-10-17 10:23:43,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 543 transitions, 1569 flow [2022-10-17 10:23:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:23:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:23:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2676 transitions. [2022-10-17 10:23:43,686 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8796844181459567 [2022-10-17 10:23:43,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2676 transitions. [2022-10-17 10:23:43,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2676 transitions. [2022-10-17 10:23:43,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:23:43,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2676 transitions. [2022-10-17 10:23:43,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 446.0) internal successors, (2676), 6 states have internal predecessors, (2676), 0 states have call successors, (0), 0 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 10:23:43,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:43,703 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:43,703 INFO L175 Difference]: Start difference. First operand has 497 places, 519 transitions, 1320 flow. Second operand 6 states and 2676 transitions. [2022-10-17 10:23:43,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 543 transitions, 1569 flow [2022-10-17 10:23:43,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 543 transitions, 1547 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-10-17 10:23:43,721 INFO L231 Difference]: Finished difference. Result has 495 places, 536 transitions, 1448 flow [2022-10-17 10:23:43,722 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1448, PETRI_PLACES=495, PETRI_TRANSITIONS=536} [2022-10-17 10:23:43,723 INFO L287 CegarLoopForPetriNet]: 459 programPoint places, 36 predicate places. [2022-10-17 10:23:43,724 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 536 transitions, 1448 flow [2022-10-17 10:23:43,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 0 states have call successors, (0), 0 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 10:23:43,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:23:43,725 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] [2022-10-17 10:23:43,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:23:43,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-10-17 10:23:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash -642914649, now seen corresponding path program 1 times [2022-10-17 10:23:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630848988] [2022-10-17 10:23:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat