./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8 --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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- 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-2329fc7 [2022-12-13 20:58:31,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:58:31,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:58:31,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:58:31,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:58:31,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:58:31,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:58:31,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:58:31,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:58:31,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:58:31,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:58:31,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:58:31,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:58:31,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:58:31,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:58:31,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:58:31,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:58:31,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:58:31,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:58:31,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:58:31,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:58:31,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:58:31,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:58:31,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:58:31,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:58:31,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:58:31,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:58:31,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:58:31,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:58:31,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:58:31,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:58:31,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:58:31,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:58:31,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:58:31,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:58:31,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:58:31,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:58:31,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:58:31,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:58:31,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:58:31,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:58:31,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:58:31,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:58:31,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:58:31,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:58:31,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:58:31,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:58:31,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:58:31,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:58:31,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:58:31,329 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:58:31,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:58:31,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:58:31,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:58:31,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:58:31,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:58:31,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:58:31,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:58:31,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:58:31,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:58:31,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:58:31,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:58:31,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:58:31,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:58:31,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:58:31,333 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2022-12-13 20:58:31,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:58:31,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:58:31,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:58:31,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:58:31,554 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:58:31,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-13 20:58:34,080 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:58:34,219 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:58:34,219 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-13 20:58:34,224 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/data/99c5bb8a4/7c3842c0fece42ceb42d28fc587ec7b6/FLAG63248b7d6 [2022-12-13 20:58:34,234 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/data/99c5bb8a4/7c3842c0fece42ceb42d28fc587ec7b6 [2022-12-13 20:58:34,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:58:34,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:58:34,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:58:34,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:58:34,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:58:34,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81ea762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34, skipping insertion in model container [2022-12-13 20:58:34,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:58:34,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:58:34,386 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-13 20:58:34,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:58:34,400 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:58:34,431 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-13 20:58:34,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:58:34,452 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:58:34,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34 WrapperNode [2022-12-13 20:58:34,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:58:34,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:58:34,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:58:34,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:58:34,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,484 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 183 [2022-12-13 20:58:34,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:58:34,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:58:34,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:58:34,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:58:34,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:58:34,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:58:34,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:58:34,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:58:34,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (1/1) ... [2022-12-13 20:58:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:58:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:58:34,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:58:34,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:58:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:58:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 20:58:34,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 20:58:34,567 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:58:34,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:58:34,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:58:34,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:58:34,569 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:58:34,650 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:58:34,652 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:58:34,903 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:58:34,913 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:58:34,913 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:58:34,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:58:34 BoogieIcfgContainer [2022-12-13 20:58:34,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:58:34,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:58:34,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:58:34,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:58:34,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:58:34" (1/3) ... [2022-12-13 20:58:34,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641cf9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:58:34, skipping insertion in model container [2022-12-13 20:58:34,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:34" (2/3) ... [2022-12-13 20:58:34,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641cf9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:58:34, skipping insertion in model container [2022-12-13 20:58:34,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:58:34" (3/3) ... [2022-12-13 20:58:34,922 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2022-12-13 20:58:34,928 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 20:58:34,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:58:34,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:58:34,936 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:58:35,005 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 20:58:35,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 239 transitions, 494 flow [2022-12-13 20:58:35,089 INFO L130 PetriNetUnfolder]: 21/237 cut-off events. [2022-12-13 20:58:35,090 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:58:35,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 237 events. 21/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 401 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2022-12-13 20:58:35,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 239 transitions, 494 flow [2022-12-13 20:58:35,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 228 transitions, 468 flow [2022-12-13 20:58:35,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:58:35,116 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 228 transitions, 468 flow [2022-12-13 20:58:35,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 228 transitions, 468 flow [2022-12-13 20:58:35,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 228 transitions, 468 flow [2022-12-13 20:58:35,153 INFO L130 PetriNetUnfolder]: 21/228 cut-off events. [2022-12-13 20:58:35,153 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:58:35,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 228 events. 21/228 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 383 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 141. Up to 2 conditions per place. [2022-12-13 20:58:35,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 6080 [2022-12-13 20:58:42,717 INFO L134 LiptonReduction]: Checked pairs total: 5691 [2022-12-13 20:58:42,717 INFO L136 LiptonReduction]: Total number of compositions: 279 [2022-12-13 20:58:42,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:58:42,731 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;@36bd8b6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:58:42,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 20:58:42,735 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 20:58:42,736 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:58:42,736 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:42,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:42,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -450751270, now seen corresponding path program 1 times [2022-12-13 20:58:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:42,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811653457] [2022-12-13 20:58:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:58:43,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:43,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811653457] [2022-12-13 20:58:43,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811653457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:43,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:43,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:58:43,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072052535] [2022-12-13 20:58:43,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:43,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:58:43,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:58:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:58:43,087 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 518 [2022-12-13 20:58:43,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:43,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 518 [2022-12-13 20:58:43,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:43,144 INFO L130 PetriNetUnfolder]: 49/84 cut-off events. [2022-12-13 20:58:43,144 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 20:58:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 185 event pairs, 19 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2022-12-13 20:58:43,145 INFO L137 encePairwiseOnDemand]: 515/518 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-13 20:58:43,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-13 20:58:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:58:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 20:58:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-12-13 20:58:43,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4202059202059202 [2022-12-13 20:58:43,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-12-13 20:58:43,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-12-13 20:58:43,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:43,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-12-13 20:58:43,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,181 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 653 transitions. [2022-12-13 20:58:43,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-13 20:58:43,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 20:58:43,184 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-13 20:58:43,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-13 20:58:43,188 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-13 20:58:43,188 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-13 20:58:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:43,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:43,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:58:43,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:43,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1807733872, now seen corresponding path program 1 times [2022-12-13 20:58:43,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:43,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946617348] [2022-12-13 20:58:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:43,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:43,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946617348] [2022-12-13 20:58:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946617348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:43,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:43,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:58:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695507876] [2022-12-13 20:58:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:58:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:43,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:58:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:58:43,532 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 518 [2022-12-13 20:58:43,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:43,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 518 [2022-12-13 20:58:43,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:43,680 INFO L130 PetriNetUnfolder]: 72/135 cut-off events. [2022-12-13 20:58:43,680 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 20:58:43,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 365 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2022-12-13 20:58:43,682 INFO L137 encePairwiseOnDemand]: 512/518 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2022-12-13 20:58:43,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2022-12-13 20:58:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:58:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:58:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2022-12-13 20:58:43,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4111969111969112 [2022-12-13 20:58:43,686 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2022-12-13 20:58:43,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2022-12-13 20:58:43,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:43,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2022-12-13 20:58:43,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,697 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,697 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1065 transitions. [2022-12-13 20:58:43,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2022-12-13 20:58:43,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 20:58:43,699 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2022-12-13 20:58:43,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-13 20:58:43,700 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-13 20:58:43,700 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2022-12-13 20:58:43,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:43,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:43,701 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:43,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:58:43,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:43,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash -994785292, now seen corresponding path program 2 times [2022-12-13 20:58:43,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:43,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100093738] [2022-12-13 20:58:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:44,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100093738] [2022-12-13 20:58:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100093738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:44,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:58:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432563539] [2022-12-13 20:58:44,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:44,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:58:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:58:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:58:44,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 518 [2022-12-13 20:58:44,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:44,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 518 [2022-12-13 20:58:44,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:44,392 INFO L130 PetriNetUnfolder]: 111/208 cut-off events. [2022-12-13 20:58:44,392 INFO L131 PetriNetUnfolder]: For 115/115 co-relation queries the response was YES. [2022-12-13 20:58:44,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 668 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2022-12-13 20:58:44,393 INFO L137 encePairwiseOnDemand]: 512/518 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2022-12-13 20:58:44,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2022-12-13 20:58:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:58:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:58:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1056 transitions. [2022-12-13 20:58:44,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40772200772200773 [2022-12-13 20:58:44,396 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1056 transitions. [2022-12-13 20:58:44,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1056 transitions. [2022-12-13 20:58:44,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:44,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1056 transitions. [2022-12-13 20:58:44,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 211.2) internal successors, (1056), 5 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,401 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,401 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 1056 transitions. [2022-12-13 20:58:44,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2022-12-13 20:58:44,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 20:58:44,403 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2022-12-13 20:58:44,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2022-12-13 20:58:44,403 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2022-12-13 20:58:44,404 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2022-12-13 20:58:44,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:44,404 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:44,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:58:44,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:44,405 INFO L85 PathProgramCache]: Analyzing trace with hash 128733850, now seen corresponding path program 3 times [2022-12-13 20:58:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422628839] [2022-12-13 20:58:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:44,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:44,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422628839] [2022-12-13 20:58:44,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422628839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:44,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:44,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:58:44,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345381412] [2022-12-13 20:58:44,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:44,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:58:44,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:58:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:58:44,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 518 [2022-12-13 20:58:44,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:44,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 518 [2022-12-13 20:58:44,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:44,912 INFO L130 PetriNetUnfolder]: 121/224 cut-off events. [2022-12-13 20:58:44,912 INFO L131 PetriNetUnfolder]: For 317/317 co-relation queries the response was YES. [2022-12-13 20:58:44,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 737 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2022-12-13 20:58:44,914 INFO L137 encePairwiseOnDemand]: 512/518 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2022-12-13 20:58:44,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2022-12-13 20:58:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:58:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:58:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1051 transitions. [2022-12-13 20:58:44,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4057915057915058 [2022-12-13 20:58:44,919 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1051 transitions. [2022-12-13 20:58:44,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1051 transitions. [2022-12-13 20:58:44,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:44,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1051 transitions. [2022-12-13 20:58:44,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.2) internal successors, (1051), 5 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,925 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,925 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 1051 transitions. [2022-12-13 20:58:44,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2022-12-13 20:58:44,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-12-13 20:58:44,927 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2022-12-13 20:58:44,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2022-12-13 20:58:44,927 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2022-12-13 20:58:44,927 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2022-12-13 20:58:44,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:44,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:44,928 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:44,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:58:44,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1776642018, now seen corresponding path program 4 times [2022-12-13 20:58:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:44,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983425099] [2022-12-13 20:58:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:45,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983425099] [2022-12-13 20:58:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983425099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:45,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:58:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389703481] [2022-12-13 20:58:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:58:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:58:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:58:45,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 518 [2022-12-13 20:58:45,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:45,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 518 [2022-12-13 20:58:45,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:45,306 INFO L130 PetriNetUnfolder]: 117/220 cut-off events. [2022-12-13 20:58:45,306 INFO L131 PetriNetUnfolder]: For 547/547 co-relation queries the response was YES. [2022-12-13 20:58:45,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 729 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2022-12-13 20:58:45,308 INFO L137 encePairwiseOnDemand]: 512/518 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2022-12-13 20:58:45,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2022-12-13 20:58:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:58:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:58:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1045 transitions. [2022-12-13 20:58:45,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4034749034749035 [2022-12-13 20:58:45,312 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1045 transitions. [2022-12-13 20:58:45,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1045 transitions. [2022-12-13 20:58:45,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:45,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1045 transitions. [2022-12-13 20:58:45,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,320 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 1045 transitions. [2022-12-13 20:58:45,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2022-12-13 20:58:45,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 20:58:45,324 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2022-12-13 20:58:45,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2022-12-13 20:58:45,325 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2022-12-13 20:58:45,325 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2022-12-13 20:58:45,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:45,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:45,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:58:45,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash -669875196, now seen corresponding path program 5 times [2022-12-13 20:58:45,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:45,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234564692] [2022-12-13 20:58:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:45,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:45,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234564692] [2022-12-13 20:58:45,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234564692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:45,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:45,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:58:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840222974] [2022-12-13 20:58:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:45,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:58:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:58:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:58:45,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 518 [2022-12-13 20:58:45,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:45,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 518 [2022-12-13 20:58:45,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:45,783 INFO L130 PetriNetUnfolder]: 118/223 cut-off events. [2022-12-13 20:58:45,783 INFO L131 PetriNetUnfolder]: For 712/712 co-relation queries the response was YES. [2022-12-13 20:58:45,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 712/712 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2022-12-13 20:58:45,785 INFO L137 encePairwiseOnDemand]: 512/518 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2022-12-13 20:58:45,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2022-12-13 20:58:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:58:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:58:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1044 transitions. [2022-12-13 20:58:45,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40308880308880307 [2022-12-13 20:58:45,788 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1044 transitions. [2022-12-13 20:58:45,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1044 transitions. [2022-12-13 20:58:45,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:45,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1044 transitions. [2022-12-13 20:58:45,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,792 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,792 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 1044 transitions. [2022-12-13 20:58:45,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2022-12-13 20:58:45,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2022-12-13 20:58:45,795 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2022-12-13 20:58:45,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2022-12-13 20:58:45,796 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2022-12-13 20:58:45,796 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2022-12-13 20:58:45,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:45,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:45,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:45,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:58:45,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash 772319386, now seen corresponding path program 6 times [2022-12-13 20:58:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:45,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409674960] [2022-12-13 20:58:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:45,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:45,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409674960] [2022-12-13 20:58:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409674960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:58:45,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:58:45,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:58:45,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462050180] [2022-12-13 20:58:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:58:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:58:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:45,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:58:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:58:46,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 518 [2022-12-13 20:58:46,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:46,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:58:46,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 518 [2022-12-13 20:58:46,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:58:46,153 INFO L130 PetriNetUnfolder]: 117/216 cut-off events. [2022-12-13 20:58:46,153 INFO L131 PetriNetUnfolder]: For 679/679 co-relation queries the response was YES. [2022-12-13 20:58:46,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 679/679 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 701 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2022-12-13 20:58:46,155 INFO L137 encePairwiseOnDemand]: 512/518 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2022-12-13 20:58:46,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2022-12-13 20:58:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:58:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 20:58:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1060 transitions. [2022-12-13 20:58:46,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4092664092664093 [2022-12-13 20:58:46,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1060 transitions. [2022-12-13 20:58:46,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1060 transitions. [2022-12-13 20:58:46,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:58:46,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1060 transitions. [2022-12-13 20:58:46,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:46,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:46,164 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 518.0) internal successors, (3108), 6 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:46,164 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 1060 transitions. [2022-12-13 20:58:46,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2022-12-13 20:58:46,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 20:58:46,167 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2022-12-13 20:58:46,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2022-12-13 20:58:46,167 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2022-12-13 20:58:46,168 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2022-12-13 20:58:46,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:58:46,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:58:46,168 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:58:46,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:58:46,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:58:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:58:46,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1218986425, now seen corresponding path program 1 times [2022-12-13 20:58:46,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:58:46,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580741791] [2022-12-13 20:58:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:58:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:58:46,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:58:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580741791] [2022-12-13 20:58:46,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580741791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:58:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620095705] [2022-12-13 20:58:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:58:46,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:58:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:58:46,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:58:46,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:58:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:58:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 20:58:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:58:46,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 20:58:46,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:58:46,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:58:46,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:58:46,966 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-12-13 20:58:46,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 271 treesize of output 254 [2022-12-13 20:58:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:58:47,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:58:50,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:58:50,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 170 [2022-12-13 20:58:50,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:58:50,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 1004 treesize of output 928 [2022-12-13 20:58:50,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:58:50,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 562 treesize of output 526 [2022-12-13 20:58:51,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:58:51,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 724 treesize of output 568 [2022-12-13 20:58:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:58:55,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620095705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:58:55,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:58:55,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2022-12-13 20:58:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638028683] [2022-12-13 20:58:55,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:58:55,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 20:58:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:58:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 20:58:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=370, Unknown=4, NotChecked=0, Total=462 [2022-12-13 20:58:59,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:59:00,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 518 [2022-12-13 20:59:00,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 22 states, 22 states have (on average 132.1818181818182) internal successors, (2908), 22 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:00,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:59:00,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 518 [2022-12-13 20:59:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 20:59:13,599 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 61 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:59:22,195 WARN L233 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 69 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:59:24,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 20:59:45,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:59:48,995 INFO L130 PetriNetUnfolder]: 680/1283 cut-off events. [2022-12-13 20:59:48,995 INFO L131 PetriNetUnfolder]: For 3560/3560 co-relation queries the response was YES. [2022-12-13 20:59:48,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5131 conditions, 1283 events. 680/1283 cut-off events. For 3560/3560 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7203 event pairs, 33 based on Foata normal form. 10/1098 useless extension candidates. Maximal degree in co-relation 4281. Up to 397 conditions per place. [2022-12-13 20:59:49,000 INFO L137 encePairwiseOnDemand]: 507/518 looper letters, 175 selfloop transitions, 128 changer transitions 87/390 dead transitions. [2022-12-13 20:59:49,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 390 transitions, 2918 flow [2022-12-13 20:59:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 20:59:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 20:59:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6714 transitions. [2022-12-13 20:59:49,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.26451816247734616 [2022-12-13 20:59:49,010 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6714 transitions. [2022-12-13 20:59:49,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6714 transitions. [2022-12-13 20:59:49,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 20:59:49,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6714 transitions. [2022-12-13 20:59:49,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 137.0204081632653) internal successors, (6714), 49 states have internal predecessors, (6714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:49,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 518.0) internal successors, (25900), 50 states have internal predecessors, (25900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:49,042 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 518.0) internal successors, (25900), 50 states have internal predecessors, (25900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:49,042 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 49 states and 6714 transitions. [2022-12-13 20:59:49,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 390 transitions, 2918 flow [2022-12-13 20:59:49,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 390 transitions, 2739 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 20:59:49,052 INFO L231 Difference]: Finished difference. Result has 114 places, 170 transitions, 1676 flow [2022-12-13 20:59:49,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1676, PETRI_PLACES=114, PETRI_TRANSITIONS=170} [2022-12-13 20:59:49,053 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2022-12-13 20:59:49,053 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 170 transitions, 1676 flow [2022-12-13 20:59:49,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 132.1818181818182) internal successors, (2908), 22 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:49,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:59:49,054 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:59:49,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:59:49,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:59:49,256 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 20:59:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:59:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -603637779, now seen corresponding path program 2 times [2022-12-13 20:59:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:59:49,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844018683] [2022-12-13 20:59:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:59:49,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:59:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:59:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:59:49,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:59:49,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844018683] [2022-12-13 20:59:49,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844018683] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:59:49,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700169700] [2022-12-13 20:59:49,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:59:49,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:59:49,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:59:49,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:59:49,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afb0a253-c376-443a-8169-3d39eab801eb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:59:49,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:59:49,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:59:49,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:59:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:59:49,892 INFO L321 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-12-13 20:59:49,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 271 treesize of output 254 [2022-12-13 20:59:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:59:50,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:00:10,135 WARN L233 SmtUtils]: Spent 18.21s on a formula simplification. DAG size of input: 4393 DAG size of output: 3957 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)