./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-4.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_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/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_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/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_2da775be-9564-40ce-841b-5964c6f63e74/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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- 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 10:27:40,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:27:40,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:27:40,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:27:40,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:27:40,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:27:40,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:27:40,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:27:40,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:27:40,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:27:40,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:27:40,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:27:40,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:27:40,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:27:40,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:27:40,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:27:40,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:27:40,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:27:40,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:27:40,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:27:40,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:27:40,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:27:40,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:27:40,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:27:40,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:27:40,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:27:40,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:27:40,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:27:40,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:27:40,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:27:40,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:27:40,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:27:40,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:27:40,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:27:40,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:27:40,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:27:40,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:27:40,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:27:40,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:27:40,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:27:40,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:27:40,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:27:40,334 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:27:40,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:27:40,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:27:40,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:27:40,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:27:40,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:27:40,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:27:40,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:27:40,338 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:27:40,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:27:40,340 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:27:40,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:27:40,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:27:40,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:27:40,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:27:40,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:27:40,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:27:40,341 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:27:40,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:27:40,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:27:40,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:27:40,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:27:40,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:27:40,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:27:40,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:27:40,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:27:40,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:27:40,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:27:40,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:27:40,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:27:40,344 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:27:40,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:27:40,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:27:40,345 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_2da775be-9564-40ce-841b-5964c6f63e74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-10-17 10:27:40,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:27:40,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:27:40,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:27:40,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:27:40,655 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:27:40,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-10-17 10:27:40,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/data/815088d03/60ad2703dfba41d58fe16586e3366350/FLAG079004e76 [2022-10-17 10:27:41,302 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:27:41,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-10-17 10:27:41,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/data/815088d03/60ad2703dfba41d58fe16586e3366350/FLAG079004e76 [2022-10-17 10:27:41,654 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/data/815088d03/60ad2703dfba41d58fe16586e3366350 [2022-10-17 10:27:41,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:27:41,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:27:41,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:27:41,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:27:41,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:27:41,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:27:41" (1/1) ... [2022-10-17 10:27:41,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26dec24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:41, skipping insertion in model container [2022-10-17 10:27:41,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:27:41" (1/1) ... [2022-10-17 10:27:41,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:27:41,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:27:41,941 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_2da775be-9564-40ce-841b-5964c6f63e74/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-10-17 10:27:41,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:27:41,958 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:27:41,982 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_2da775be-9564-40ce-841b-5964c6f63e74/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-10-17 10:27:41,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:27:42,001 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:27:42,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42 WrapperNode [2022-10-17 10:27:42,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:27:42,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:27:42,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:27:42,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:27:42,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,044 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 154 [2022-10-17 10:27:42,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:27:42,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:27:42,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:27:42,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:27:42,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,072 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:27:42,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:27:42,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:27:42,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:27:42,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (1/1) ... [2022-10-17 10:27:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:27:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:42,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:27:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:27:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:27:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-10-17 10:27:42,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-10-17 10:27:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-10-17 10:27:42,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-10-17 10:27:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:27:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:27:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:27:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:27:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:27:42,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:27:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:27:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:27:42,177 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 10:27:42,297 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:27:42,299 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:27:42,705 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:27:42,720 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:27:42,720 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:27:42,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:27:42 BoogieIcfgContainer [2022-10-17 10:27:42,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:27:42,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:27:42,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:27:42,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:27:42,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:27:41" (1/3) ... [2022-10-17 10:27:42,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468f0e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:27:42, skipping insertion in model container [2022-10-17 10:27:42,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:27:42" (2/3) ... [2022-10-17 10:27:42,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468f0e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:27:42, skipping insertion in model container [2022-10-17 10:27:42,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:27:42" (3/3) ... [2022-10-17 10:27:42,757 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2022-10-17 10:27:42,766 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:27:42,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:27:42,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:27:42,777 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:27:42,931 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-10-17 10:27:43,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 414 flow [2022-10-17 10:27:43,128 INFO L130 PetriNetUnfolder]: 16/197 cut-off events. [2022-10-17 10:27:43,128 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:27:43,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 16/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 175 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-10-17 10:27:43,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 199 transitions, 414 flow [2022-10-17 10:27:43,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 188 transitions, 388 flow [2022-10-17 10:27:43,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:27:43,166 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;@6df572b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:27:43,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 10:27:43,203 INFO L130 PetriNetUnfolder]: 13/156 cut-off events. [2022-10-17 10:27:43,203 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:27:43,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:43,204 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] [2022-10-17 10:27:43,205 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 10:27:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash -911255078, now seen corresponding path program 1 times [2022-10-17 10:27:43,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:43,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932057077] [2022-10-17 10:27:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:43,544 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 10:27:43,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:43,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932057077] [2022-10-17 10:27:43,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932057077] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:43,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:43,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:27:43,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320923934] [2022-10-17 10:27:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:27:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:27:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:27:43,618 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 199 [2022-10-17 10:27:43,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 188 transitions, 388 flow. Second operand has 2 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 10:27:43,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:43,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 199 [2022-10-17 10:27:43,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:43,715 INFO L130 PetriNetUnfolder]: 3/175 cut-off events. [2022-10-17 10:27:43,715 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-10-17 10:27:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 175 events. 3/175 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 140 event pairs, 0 based on Foata normal form. 16/178 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-10-17 10:27:43,719 INFO L137 encePairwiseOnDemand]: 186/199 looper letters, 4 selfloop transitions, 0 changer transitions 5/175 dead transitions. [2022-10-17 10:27:43,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 175 transitions, 370 flow [2022-10-17 10:27:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:27:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:27:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 379 transitions. [2022-10-17 10:27:43,736 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9522613065326633 [2022-10-17 10:27:43,736 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 379 transitions. [2022-10-17 10:27:43,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 379 transitions. [2022-10-17 10:27:43,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:43,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 379 transitions. [2022-10-17 10:27:43,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 10:27:43,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 10:27:43,754 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 10:27:43,756 INFO L175 Difference]: Start difference. First operand has 179 places, 188 transitions, 388 flow. Second operand 2 states and 379 transitions. [2022-10-17 10:27:43,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 175 transitions, 370 flow [2022-10-17 10:27:43,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-10-17 10:27:43,767 INFO L231 Difference]: Finished difference. Result has 176 places, 170 transitions, 344 flow [2022-10-17 10:27:43,770 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=176, PETRI_TRANSITIONS=170} [2022-10-17 10:27:43,774 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, -3 predicate places. [2022-10-17 10:27:43,774 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 170 transitions, 344 flow [2022-10-17 10:27:43,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 10:27:43,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:43,775 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] [2022-10-17 10:27:43,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:27:43,776 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 10:27:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:43,777 INFO L85 PathProgramCache]: Analyzing trace with hash -366624895, now seen corresponding path program 1 times [2022-10-17 10:27:43,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:43,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344691167] [2022-10-17 10:27:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:43,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:44,375 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 10:27:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:44,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344691167] [2022-10-17 10:27:44,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344691167] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:44,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:44,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:27:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133605470] [2022-10-17 10:27:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:44,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:27:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:27:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:27:44,384 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 199 [2022-10-17 10:27:44,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 170 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 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 10:27:44,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:44,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 199 [2022-10-17 10:27:44,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:44,640 INFO L130 PetriNetUnfolder]: 22/292 cut-off events. [2022-10-17 10:27:44,641 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-10-17 10:27:44,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 292 events. 22/292 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 652 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 368. Up to 61 conditions per place. [2022-10-17 10:27:44,647 INFO L137 encePairwiseOnDemand]: 191/199 looper letters, 38 selfloop transitions, 7 changer transitions 0/174 dead transitions. [2022-10-17 10:27:44,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 174 transitions, 442 flow [2022-10-17 10:27:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:27:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-10-17 10:27:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2022-10-17 10:27:44,656 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7273869346733668 [2022-10-17 10:27:44,657 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2022-10-17 10:27:44,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2022-10-17 10:27:44,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:44,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2022-10-17 10:27:44,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 0 states have call successors, (0), 0 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 10:27:44,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 0 states have call successors, (0), 0 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 10:27:44,671 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 0 states have call successors, (0), 0 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 10:27:44,671 INFO L175 Difference]: Start difference. First operand has 176 places, 170 transitions, 344 flow. Second operand 8 states and 1158 transitions. [2022-10-17 10:27:44,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 174 transitions, 442 flow [2022-10-17 10:27:44,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 174 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:27:44,682 INFO L231 Difference]: Finished difference. Result has 179 places, 171 transitions, 366 flow [2022-10-17 10:27:44,682 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=366, PETRI_PLACES=179, PETRI_TRANSITIONS=171} [2022-10-17 10:27:44,684 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 0 predicate places. [2022-10-17 10:27:44,684 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 171 transitions, 366 flow [2022-10-17 10:27:44,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 0 states have call successors, (0), 0 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 10:27:44,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:44,686 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] [2022-10-17 10:27:44,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:27:44,687 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 10:27:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:44,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1541533645, now seen corresponding path program 1 times [2022-10-17 10:27:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264686076] [2022-10-17 10:27:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,101 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 10:27:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264686076] [2022-10-17 10:27:45,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264686076] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:45,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:45,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:27:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238694669] [2022-10-17 10:27:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:45,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:27:45,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:45,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:27:45,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:27:45,107 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 199 [2022-10-17 10:27:45,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 171 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 10:27:45,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:45,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 199 [2022-10-17 10:27:45,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:45,404 INFO L130 PetriNetUnfolder]: 121/786 cut-off events. [2022-10-17 10:27:45,404 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-10-17 10:27:45,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 786 events. 121/786 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4243 event pairs, 38 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 1073. Up to 133 conditions per place. [2022-10-17 10:27:45,411 INFO L137 encePairwiseOnDemand]: 192/199 looper letters, 65 selfloop transitions, 5 changer transitions 4/204 dead transitions. [2022-10-17 10:27:45,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 204 transitions, 585 flow [2022-10-17 10:27:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:27:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:27:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2022-10-17 10:27:45,415 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7613065326633166 [2022-10-17 10:27:45,415 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2022-10-17 10:27:45,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2022-10-17 10:27:45,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:45,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2022-10-17 10:27:45,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 0 states have call successors, (0), 0 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 10:27:45,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 10:27:45,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 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 10:27:45,425 INFO L175 Difference]: Start difference. First operand has 179 places, 171 transitions, 366 flow. Second operand 6 states and 909 transitions. [2022-10-17 10:27:45,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 204 transitions, 585 flow [2022-10-17 10:27:45,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 204 transitions, 573 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-10-17 10:27:45,444 INFO L231 Difference]: Finished difference. Result has 181 places, 174 transitions, 383 flow [2022-10-17 10:27:45,445 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=181, PETRI_TRANSITIONS=174} [2022-10-17 10:27:45,446 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 2 predicate places. [2022-10-17 10:27:45,446 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 174 transitions, 383 flow [2022-10-17 10:27:45,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 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 10:27:45,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:45,447 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] [2022-10-17 10:27:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:27:45,448 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 10:27:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash 950553800, now seen corresponding path program 1 times [2022-10-17 10:27:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:45,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205475638] [2022-10-17 10:27:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:45,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:45,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205475638] [2022-10-17 10:27:45,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205475638] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137762000] [2022-10-17 10:27:45,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:45,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:45,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:45,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:27:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:27:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:46,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:46,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137762000] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:46,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:27:46,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-10-17 10:27:46,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843219490] [2022-10-17 10:27:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:46,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:27:46,271 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-10-17 10:27:46,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 174 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 10:27:46,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:46,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-10-17 10:27:46,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:46,469 INFO L130 PetriNetUnfolder]: 112/822 cut-off events. [2022-10-17 10:27:46,470 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-10-17 10:27:46,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 822 events. 112/822 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4303 event pairs, 13 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1081. Up to 143 conditions per place. [2022-10-17 10:27:46,484 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 26 selfloop transitions, 5 changer transitions 1/186 dead transitions. [2022-10-17 10:27:46,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 186 transitions, 475 flow [2022-10-17 10:27:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:27:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:27:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-10-17 10:27:46,487 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8706030150753769 [2022-10-17 10:27:46,488 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-10-17 10:27:46,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-10-17 10:27:46,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:46,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-10-17 10:27:46,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 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 10:27:46,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 10:27:46,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 10:27:46,501 INFO L175 Difference]: Start difference. First operand has 181 places, 174 transitions, 383 flow. Second operand 4 states and 693 transitions. [2022-10-17 10:27:46,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 186 transitions, 475 flow [2022-10-17 10:27:46,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 186 transitions, 471 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-10-17 10:27:46,510 INFO L231 Difference]: Finished difference. Result has 183 places, 178 transitions, 415 flow [2022-10-17 10:27:46,510 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=183, PETRI_TRANSITIONS=178} [2022-10-17 10:27:46,512 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 4 predicate places. [2022-10-17 10:27:46,512 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 178 transitions, 415 flow [2022-10-17 10:27:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 10:27:46,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:46,513 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] [2022-10-17 10:27:46,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:46,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:46,735 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 10:27:46,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:46,735 INFO L85 PathProgramCache]: Analyzing trace with hash -289998246, now seen corresponding path program 2 times [2022-10-17 10:27:46,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694176485] [2022-10-17 10:27:46,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:46,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:46,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694176485] [2022-10-17 10:27:46,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694176485] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:46,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:46,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:46,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413330005] [2022-10-17 10:27:46,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:46,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:46,939 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-10-17 10:27:46,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 178 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 10:27:46,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:46,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-10-17 10:27:46,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:47,213 INFO L130 PetriNetUnfolder]: 128/916 cut-off events. [2022-10-17 10:27:47,213 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2022-10-17 10:27:47,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 916 events. 128/916 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4722 event pairs, 46 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 1356. Up to 189 conditions per place. [2022-10-17 10:27:47,223 INFO L137 encePairwiseOnDemand]: 193/199 looper letters, 29 selfloop transitions, 6 changer transitions 0/189 dead transitions. [2022-10-17 10:27:47,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 189 transitions, 526 flow [2022-10-17 10:27:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:27:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:27:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 856 transitions. [2022-10-17 10:27:47,227 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8603015075376884 [2022-10-17 10:27:47,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 856 transitions. [2022-10-17 10:27:47,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 856 transitions. [2022-10-17 10:27:47,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:47,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 856 transitions. [2022-10-17 10:27:47,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 0 states have call successors, (0), 0 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 10:27:47,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 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 10:27:47,234 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 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 10:27:47,235 INFO L175 Difference]: Start difference. First operand has 183 places, 178 transitions, 415 flow. Second operand 5 states and 856 transitions. [2022-10-17 10:27:47,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 189 transitions, 526 flow [2022-10-17 10:27:47,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 189 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:27:47,243 INFO L231 Difference]: Finished difference. Result has 189 places, 180 transitions, 450 flow [2022-10-17 10:27:47,244 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=450, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-10-17 10:27:47,246 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 10 predicate places. [2022-10-17 10:27:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 450 flow [2022-10-17 10:27:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 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 10:27:47,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:47,247 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] [2022-10-17 10:27:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:27:47,248 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 10:27:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1246680816, now seen corresponding path program 3 times [2022-10-17 10:27:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760384259] [2022-10-17 10:27:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:47,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760384259] [2022-10-17 10:27:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760384259] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273053842] [2022-10-17 10:27:47,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:27:47,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:47,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:47,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:47,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:27:47,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:27:47,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:27:47,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:27:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:47,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:48,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273053842] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:48,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:48,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-10-17 10:27:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44703278] [2022-10-17 10:27:48,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:27:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:27:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:27:48,047 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 199 [2022-10-17 10:27:48,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 450 flow. Second operand has 12 states, 12 states have (on average 163.75) internal successors, (1965), 12 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 10:27:48,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:48,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 199 [2022-10-17 10:27:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:49,034 INFO L130 PetriNetUnfolder]: 275/1629 cut-off events. [2022-10-17 10:27:49,034 INFO L131 PetriNetUnfolder]: For 676/681 co-relation queries the response was YES. [2022-10-17 10:27:49,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2714 conditions, 1629 events. 275/1629 cut-off events. For 676/681 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10294 event pairs, 56 based on Foata normal form. 40/1577 useless extension candidates. Maximal degree in co-relation 2702. Up to 144 conditions per place. [2022-10-17 10:27:49,051 INFO L137 encePairwiseOnDemand]: 189/199 looper letters, 114 selfloop transitions, 46 changer transitions 3/313 dead transitions. [2022-10-17 10:27:49,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 313 transitions, 1269 flow [2022-10-17 10:27:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-10-17 10:27:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-10-17 10:27:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3225 transitions. [2022-10-17 10:27:49,095 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.85294895530283 [2022-10-17 10:27:49,095 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3225 transitions. [2022-10-17 10:27:49,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3225 transitions. [2022-10-17 10:27:49,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:49,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3225 transitions. [2022-10-17 10:27:49,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 169.73684210526315) internal successors, (3225), 19 states have internal predecessors, (3225), 0 states have call successors, (0), 0 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 10:27:49,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 199.0) internal successors, (3980), 20 states have internal predecessors, (3980), 0 states have call successors, (0), 0 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 10:27:49,124 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 199.0) internal successors, (3980), 20 states have internal predecessors, (3980), 0 states have call successors, (0), 0 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 10:27:49,124 INFO L175 Difference]: Start difference. First operand has 189 places, 180 transitions, 450 flow. Second operand 19 states and 3225 transitions. [2022-10-17 10:27:49,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 313 transitions, 1269 flow [2022-10-17 10:27:49,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 313 transitions, 1231 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-10-17 10:27:49,141 INFO L231 Difference]: Finished difference. Result has 216 places, 225 transitions, 854 flow [2022-10-17 10:27:49,142 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=854, PETRI_PLACES=216, PETRI_TRANSITIONS=225} [2022-10-17 10:27:49,145 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 37 predicate places. [2022-10-17 10:27:49,145 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 225 transitions, 854 flow [2022-10-17 10:27:49,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.75) internal successors, (1965), 12 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 10:27:49,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:49,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:49,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:27:49,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:49,358 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 10:27:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -818561113, now seen corresponding path program 1 times [2022-10-17 10:27:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:49,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060398108] [2022-10-17 10:27:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:49,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:49,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060398108] [2022-10-17 10:27:49,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060398108] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:49,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:49,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:49,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737357917] [2022-10-17 10:27:49,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:49,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:49,518 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-10-17 10:27:49,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 225 transitions, 854 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 10:27:49,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:49,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-10-17 10:27:49,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:49,752 INFO L130 PetriNetUnfolder]: 94/864 cut-off events. [2022-10-17 10:27:49,752 INFO L131 PetriNetUnfolder]: For 1129/1232 co-relation queries the response was YES. [2022-10-17 10:27:49,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 864 events. 94/864 cut-off events. For 1129/1232 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4350 event pairs, 11 based on Foata normal form. 22/826 useless extension candidates. Maximal degree in co-relation 1670. Up to 128 conditions per place. [2022-10-17 10:27:49,761 INFO L137 encePairwiseOnDemand]: 193/199 looper letters, 45 selfloop transitions, 10 changer transitions 1/234 dead transitions. [2022-10-17 10:27:49,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 234 transitions, 1018 flow [2022-10-17 10:27:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:27:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-10-17 10:27:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2022-10-17 10:27:49,765 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8854271356783919 [2022-10-17 10:27:49,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2022-10-17 10:27:49,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2022-10-17 10:27:49,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:49,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2022-10-17 10:27:49,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 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 10:27:49,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 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 10:27:49,774 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 0 states have call successors, (0), 0 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 10:27:49,774 INFO L175 Difference]: Start difference. First operand has 216 places, 225 transitions, 854 flow. Second operand 5 states and 881 transitions. [2022-10-17 10:27:49,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 234 transitions, 1018 flow [2022-10-17 10:27:49,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 234 transitions, 990 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-10-17 10:27:49,795 INFO L231 Difference]: Finished difference. Result has 219 places, 226 transitions, 875 flow [2022-10-17 10:27:49,795 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=219, PETRI_TRANSITIONS=226} [2022-10-17 10:27:49,796 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 40 predicate places. [2022-10-17 10:27:49,796 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 226 transitions, 875 flow [2022-10-17 10:27:49,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 10:27:49,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:49,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:27:49,798 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 10:27:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1501273137, now seen corresponding path program 2 times [2022-10-17 10:27:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:49,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602619426] [2022-10-17 10:27:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:27:49,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:49,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602619426] [2022-10-17 10:27:49,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602619426] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:27:49,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:27:49,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:27:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760190480] [2022-10-17 10:27:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:27:49,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:27:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:27:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:27:49,993 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-10-17 10:27:49,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 226 transitions, 875 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 10:27:49,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:49,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-10-17 10:27:49,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:27:50,268 INFO L130 PetriNetUnfolder]: 108/1057 cut-off events. [2022-10-17 10:27:50,269 INFO L131 PetriNetUnfolder]: For 1237/1304 co-relation queries the response was YES. [2022-10-17 10:27:50,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1991 conditions, 1057 events. 108/1057 cut-off events. For 1237/1304 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5918 event pairs, 36 based on Foata normal form. 16/993 useless extension candidates. Maximal degree in co-relation 1966. Up to 156 conditions per place. [2022-10-17 10:27:50,282 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 49 selfloop transitions, 10 changer transitions 2/239 dead transitions. [2022-10-17 10:27:50,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 239 transitions, 1082 flow [2022-10-17 10:27:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:27:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-10-17 10:27:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2022-10-17 10:27:50,286 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8919597989949749 [2022-10-17 10:27:50,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2022-10-17 10:27:50,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2022-10-17 10:27:50,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:27:50,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2022-10-17 10:27:50,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 10:27:50,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 10:27:50,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 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 10:27:50,293 INFO L175 Difference]: Start difference. First operand has 219 places, 226 transitions, 875 flow. Second operand 4 states and 710 transitions. [2022-10-17 10:27:50,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 239 transitions, 1082 flow [2022-10-17 10:27:50,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 239 transitions, 1059 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-10-17 10:27:50,311 INFO L231 Difference]: Finished difference. Result has 222 places, 229 transitions, 916 flow [2022-10-17 10:27:50,312 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=916, PETRI_PLACES=222, PETRI_TRANSITIONS=229} [2022-10-17 10:27:50,314 INFO L287 CegarLoopForPetriNet]: 179 programPoint places, 43 predicate places. [2022-10-17 10:27:50,315 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 229 transitions, 916 flow [2022-10-17 10:27:50,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 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 10:27:50,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:27:50,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:27:50,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:27:50,316 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 10:27:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:27:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1474347759, now seen corresponding path program 1 times [2022-10-17 10:27:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:27:50,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526973792] [2022-10-17 10:27:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:27:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:27:50,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:27:50,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526973792] [2022-10-17 10:27:50,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526973792] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:27:50,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776975637] [2022-10-17 10:27:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:27:50,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:27:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:27:50,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:27:50,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da775be-9564-40ce-841b-5964c6f63e74/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:27:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:27:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-17 10:27:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:27:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 10:27:52,497 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:27:52,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-10-17 10:27:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:27:52,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:27:53,051 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-10-17 10:27:53,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-10-17 10:27:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:27:53,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776975637] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:27:53,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:27:53,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 25, 20] total 45 [2022-10-17 10:27:53,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264396946] [2022-10-17 10:27:53,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:27:53,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-10-17 10:27:53,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:27:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-10-17 10:27:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-10-17 10:27:53,734 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 199 [2022-10-17 10:27:53,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 229 transitions, 916 flow. Second operand has 45 states, 45 states have (on average 85.22222222222223) internal successors, (3835), 45 states have internal predecessors, (3835), 0 states have call successors, (0), 0 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 10:27:53,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:27:53,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 199 [2022-10-17 10:27:53,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand