./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:32,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:32,238 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:32,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:32,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:32,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:32,287 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:32,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:32,289 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:32,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:32,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:32,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:32,297 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:32,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:32,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:32,299 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:32,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:32,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:32,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:32,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:32,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:32,302 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:32,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:32,303 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:32,303 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:32,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:32,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:32,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:32,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:32,306 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:32,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:32,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:32,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:32,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:32,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:32,308 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:32,308 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:32,309 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:32,309 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:32,309 INFO L153 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_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2023-11-19 07:40:32,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:32,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:32,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:32,662 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:32,662 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:32,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2023-11-19 07:40:35,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:36,068 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:36,069 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/sv-benchmarks/c/weaver/unroll-4.wvr.c [2023-11-19 07:40:36,079 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/data/8df80702f/cd31d1ad8f1a483698bf1ab9118e1483/FLAG46b207407 [2023-11-19 07:40:36,095 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/data/8df80702f/cd31d1ad8f1a483698bf1ab9118e1483 [2023-11-19 07:40:36,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:36,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:36,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:36,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:36,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:36,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efd90bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36, skipping insertion in model container [2023-11-19 07:40:36,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:36,364 WARN L240 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_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/sv-benchmarks/c/weaver/unroll-4.wvr.c[2598,2611] [2023-11-19 07:40:36,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:36,388 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:36,417 WARN L240 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_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/sv-benchmarks/c/weaver/unroll-4.wvr.c[2598,2611] [2023-11-19 07:40:36,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:36,440 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:36,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36 WrapperNode [2023-11-19 07:40:36,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:36,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:36,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:36,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:36,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,496 INFO L138 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 159 [2023-11-19 07:40:36,497 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:36,498 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:36,498 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:36,498 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:36,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,526 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:36,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:36,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:36,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:36,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (1/1) ... [2023-11-19 07:40:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:36,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:36,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:36,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:36,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:36,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:40:36,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:40:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:40:36,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:40:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:40:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:40:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:40:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:36,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:40:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:40:36,631 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:40:36,755 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:36,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:37,177 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:37,204 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:37,205 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:40:37,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:37 BoogieIcfgContainer [2023-11-19 07:40:37,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:37,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:37,215 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:37,220 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:37,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:36" (1/3) ... [2023-11-19 07:40:37,221 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17599066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:37, skipping insertion in model container [2023-11-19 07:40:37,222 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:36" (2/3) ... [2023-11-19 07:40:37,222 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17599066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:37, skipping insertion in model container [2023-11-19 07:40:37,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:37" (3/3) ... [2023-11-19 07:40:37,224 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2023-11-19 07:40:37,236 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:40:37,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:37,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:40:37,250 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:40:37,407 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:40:37,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 201 transitions, 416 flow [2023-11-19 07:40:37,613 INFO L124 PetriNetUnfolderBase]: 16/199 cut-off events. [2023-11-19 07:40:37,614 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:37,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 16/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 176 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-19 07:40:37,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 201 transitions, 416 flow [2023-11-19 07:40:37,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 190 transitions, 392 flow [2023-11-19 07:40:37,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:40:37,650 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 190 transitions, 392 flow [2023-11-19 07:40:37,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 190 transitions, 392 flow [2023-11-19 07:40:37,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 190 transitions, 392 flow [2023-11-19 07:40:37,722 INFO L124 PetriNetUnfolderBase]: 16/190 cut-off events. [2023-11-19 07:40:37,724 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:37,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 16/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 111. Up to 2 conditions per place. [2023-11-19 07:40:37,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 3780 [2023-11-19 07:40:45,465 INFO L134 LiptonReduction]: Checked pairs total: 3730 [2023-11-19 07:40:45,466 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-11-19 07:40:45,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:45,507 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=LoopHeads, 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;@1632e097, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:45,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:40:45,517 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:40:45,517 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-19 07:40:45,517 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:40:45,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:45,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:45,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:45,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1387528094, now seen corresponding path program 1 times [2023-11-19 07:40:45,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792165480] [2023-11-19 07:40:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:45,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:46,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792165480] [2023-11-19 07:40:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792165480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:40:46,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126648680] [2023-11-19 07:40:46,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:46,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:46,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-19 07:40:46,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:46,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-19 07:40:46,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:46,400 INFO L124 PetriNetUnfolderBase]: 75/136 cut-off events. [2023-11-19 07:40:46,400 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:40:46,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 136 events. 75/136 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 356 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-19 07:40:46,404 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 25 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-11-19 07:40:46,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 137 flow [2023-11-19 07:40:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 558 transitions. [2023-11-19 07:40:46,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-19 07:40:46,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 558 transitions. [2023-11-19 07:40:46,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 558 transitions. [2023-11-19 07:40:46,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:46,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 558 transitions. [2023-11-19 07:40:46,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,466 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 558 transitions. [2023-11-19 07:40:46,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 137 flow [2023-11-19 07:40:46,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:40:46,473 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-11-19 07:40:46,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, 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=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-11-19 07:40:46,485 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-19 07:40:46,486 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-11-19 07:40:46,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:46,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:46,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:46,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:46,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash 178995938, now seen corresponding path program 1 times [2023-11-19 07:40:46,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:46,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269187954] [2023-11-19 07:40:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:46,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:46,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269187954] [2023-11-19 07:40:46,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269187954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:46,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:46,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:46,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55875152] [2023-11-19 07:40:46,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:46,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:46,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:46,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:46,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 432 [2023-11-19 07:40:46,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:46,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 432 [2023-11-19 07:40:46,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:46,971 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-19 07:40:46,971 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-19 07:40:46,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 137 events. 75/137 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 334 event pairs, 48 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-19 07:40:46,974 INFO L140 encePairwiseOnDemand]: 429/432 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-19 07:40:46,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 99 flow [2023-11-19 07:40:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:40:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-11-19 07:40:46,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-11-19 07:40:46,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-11-19 07:40:46,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-11-19 07:40:46,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:46,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-11-19 07:40:46,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 432.0) internal successors, (1728), 4 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,991 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 3 states and 544 transitions. [2023-11-19 07:40:46,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 99 flow [2023-11-19 07:40:46,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:46,994 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 66 flow [2023-11-19 07:40:46,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-11-19 07:40:46,995 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-11-19 07:40:46,996 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 66 flow [2023-11-19 07:40:46,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:46,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:46,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:46,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:46,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:46,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:46,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2125792267, now seen corresponding path program 1 times [2023-11-19 07:40:46,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345960651] [2023-11-19 07:40:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:47,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345960651] [2023-11-19 07:40:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345960651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552133863] [2023-11-19 07:40:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:47,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:47,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:47,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:47,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552133863] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:47,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:47,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-19 07:40:47,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753412423] [2023-11-19 07:40:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:47,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 432 [2023-11-19 07:40:47,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:47,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 432 [2023-11-19 07:40:47,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:47,779 INFO L124 PetriNetUnfolderBase]: 83/151 cut-off events. [2023-11-19 07:40:47,779 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-19 07:40:47,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 151 events. 83/151 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 407 event pairs, 24 based on Foata normal form. 6/156 useless extension candidates. Maximal degree in co-relation 347. Up to 78 conditions per place. [2023-11-19 07:40:47,782 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 31 selfloop transitions, 4 changer transitions 1/36 dead transitions. [2023-11-19 07:40:47,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 178 flow [2023-11-19 07:40:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:40:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 728 transitions. [2023-11-19 07:40:47,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2023-11-19 07:40:47,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 728 transitions. [2023-11-19 07:40:47,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 728 transitions. [2023-11-19 07:40:47,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:47,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 728 transitions. [2023-11-19 07:40:47,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.0) internal successors, (728), 4 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,801 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 66 flow. Second operand 4 states and 728 transitions. [2023-11-19 07:40:47,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 178 flow [2023-11-19 07:40:47,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:47,805 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 88 flow [2023-11-19 07:40:47,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-11-19 07:40:47,806 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-11-19 07:40:47,806 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 88 flow [2023-11-19 07:40:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.0) internal successors, (708), 4 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:47,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:47,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:40:48,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:48,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1585114726, now seen corresponding path program 1 times [2023-11-19 07:40:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:48,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984246496] [2023-11-19 07:40:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:48,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:48,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984246496] [2023-11-19 07:40:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984246496] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:48,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830067994] [2023-11-19 07:40:48,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:48,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2023-11-19 07:40:48,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:48,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2023-11-19 07:40:48,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:48,461 INFO L124 PetriNetUnfolderBase]: 93/184 cut-off events. [2023-11-19 07:40:48,461 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-19 07:40:48,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 184 events. 93/184 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 626 event pairs, 26 based on Foata normal form. 12/195 useless extension candidates. Maximal degree in co-relation 490. Up to 101 conditions per place. [2023-11-19 07:40:48,464 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 33 selfloop transitions, 4 changer transitions 8/45 dead transitions. [2023-11-19 07:40:48,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 45 transitions, 253 flow [2023-11-19 07:40:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 896 transitions. [2023-11-19 07:40:48,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-11-19 07:40:48,469 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 896 transitions. [2023-11-19 07:40:48,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 896 transitions. [2023-11-19 07:40:48,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:48,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 896 transitions. [2023-11-19 07:40:48,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.2) internal successors, (896), 5 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,483 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,483 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 88 flow. Second operand 5 states and 896 transitions. [2023-11-19 07:40:48,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 45 transitions, 253 flow [2023-11-19 07:40:48,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 45 transitions, 248 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:48,488 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 115 flow [2023-11-19 07:40:48,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-11-19 07:40:48,491 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-11-19 07:40:48,491 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 115 flow [2023-11-19 07:40:48,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:48,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:48,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:40:48,496 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:48,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1552427397, now seen corresponding path program 2 times [2023-11-19 07:40:48,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361998391] [2023-11-19 07:40:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:48,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:48,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361998391] [2023-11-19 07:40:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361998391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:48,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088371590] [2023-11-19 07:40:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:48,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:48,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:48,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:48,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:48,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:48,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:48,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:48,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088371590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:48,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:48,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:40:48,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895644765] [2023-11-19 07:40:48,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:48,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:49,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 432 [2023-11-19 07:40:49,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 115 flow. Second operand has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:49,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 432 [2023-11-19 07:40:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:49,254 INFO L124 PetriNetUnfolderBase]: 117/232 cut-off events. [2023-11-19 07:40:49,254 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-11-19 07:40:49,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 232 events. 117/232 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 803 event pairs, 42 based on Foata normal form. 6/237 useless extension candidates. Maximal degree in co-relation 761. Up to 135 conditions per place. [2023-11-19 07:40:49,257 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 34 selfloop transitions, 11 changer transitions 6/51 dead transitions. [2023-11-19 07:40:49,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 338 flow [2023-11-19 07:40:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 893 transitions. [2023-11-19 07:40:49,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134259259259259 [2023-11-19 07:40:49,262 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 893 transitions. [2023-11-19 07:40:49,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 893 transitions. [2023-11-19 07:40:49,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:49,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 893 transitions. [2023-11-19 07:40:49,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 178.6) internal successors, (893), 5 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,273 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,273 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 115 flow. Second operand 5 states and 893 transitions. [2023-11-19 07:40:49,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 338 flow [2023-11-19 07:40:49,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 320 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-19 07:40:49,281 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 194 flow [2023-11-19 07:40:49,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-19 07:40:49,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-19 07:40:49,288 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 194 flow [2023-11-19 07:40:49,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 172.75) internal successors, (1382), 8 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:49,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:49,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:49,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:49,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:49,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:49,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2082801284, now seen corresponding path program 2 times [2023-11-19 07:40:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182296186] [2023-11-19 07:40:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:49,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182296186] [2023-11-19 07:40:49,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182296186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:49,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334152464] [2023-11-19 07:40:49,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:49,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:49,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:49,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:49,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:49,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:49,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:49,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:49,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334152464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:49,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:40:49,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2023-11-19 07:40:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568897599] [2023-11-19 07:40:49,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:49,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:50,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2023-11-19 07:40:50,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:50,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2023-11-19 07:40:50,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:50,235 INFO L124 PetriNetUnfolderBase]: 123/242 cut-off events. [2023-11-19 07:40:50,235 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2023-11-19 07:40:50,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 242 events. 123/242 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 901 event pairs, 38 based on Foata normal form. 4/245 useless extension candidates. Maximal degree in co-relation 903. Up to 147 conditions per place. [2023-11-19 07:40:50,238 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 37 selfloop transitions, 11 changer transitions 4/52 dead transitions. [2023-11-19 07:40:50,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 397 flow [2023-11-19 07:40:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 897 transitions. [2023-11-19 07:40:50,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152777777777778 [2023-11-19 07:40:50,244 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 897 transitions. [2023-11-19 07:40:50,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 897 transitions. [2023-11-19 07:40:50,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:50,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 897 transitions. [2023-11-19 07:40:50,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.4) internal successors, (897), 5 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,255 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,256 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 194 flow. Second operand 5 states and 897 transitions. [2023-11-19 07:40:50,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 397 flow [2023-11-19 07:40:50,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 395 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 07:40:50,261 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 271 flow [2023-11-19 07:40:50,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-11-19 07:40:50,262 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-11-19 07:40:50,262 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 271 flow [2023-11-19 07:40:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:50,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:50,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:40:50,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:50,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1313229734, now seen corresponding path program 3 times [2023-11-19 07:40:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:50,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589311961] [2023-11-19 07:40:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:50,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:50,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589311961] [2023-11-19 07:40:50,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589311961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804529849] [2023-11-19 07:40:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:40:50,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:50,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:50,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:50,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:40:50,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:50,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:50,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:50,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:50,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804529849] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:50,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:50,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2023-11-19 07:40:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459716162] [2023-11-19 07:40:50,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:50,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:50,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-19 07:40:50,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:50,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:50,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-19 07:40:50,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:51,088 INFO L124 PetriNetUnfolderBase]: 123/236 cut-off events. [2023-11-19 07:40:51,088 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2023-11-19 07:40:51,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 236 events. 123/236 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 822 event pairs, 38 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 988. Up to 146 conditions per place. [2023-11-19 07:40:51,091 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 34 selfloop transitions, 9 changer transitions 4/47 dead transitions. [2023-11-19 07:40:51,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 422 flow [2023-11-19 07:40:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:40:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 738 transitions. [2023-11-19 07:40:51,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2023-11-19 07:40:51,095 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 738 transitions. [2023-11-19 07:40:51,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 738 transitions. [2023-11-19 07:40:51,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:51,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 738 transitions. [2023-11-19 07:40:51,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,103 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 432.0) internal successors, (2160), 5 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,103 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 271 flow. Second operand 4 states and 738 transitions. [2023-11-19 07:40:51,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 422 flow [2023-11-19 07:40:51,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 407 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-19 07:40:51,109 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 300 flow [2023-11-19 07:40:51,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-19 07:40:51,110 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-19 07:40:51,110 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 300 flow [2023-11-19 07:40:51,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:51,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:51,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:40:51,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:40:51,325 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:51,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:51,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1788464051, now seen corresponding path program 3 times [2023-11-19 07:40:51,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:51,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586269649] [2023-11-19 07:40:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:51,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:51,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586269649] [2023-11-19 07:40:51,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586269649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:51,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:51,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:51,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64280267] [2023-11-19 07:40:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:51,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:51,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:51,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 432 [2023-11-19 07:40:51,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:51,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 432 [2023-11-19 07:40:51,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:51,618 INFO L124 PetriNetUnfolderBase]: 106/195 cut-off events. [2023-11-19 07:40:51,618 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2023-11-19 07:40:51,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 195 events. 106/195 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 572 event pairs, 34 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 853. Up to 149 conditions per place. [2023-11-19 07:40:51,621 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 31 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2023-11-19 07:40:51,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 421 flow [2023-11-19 07:40:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 880 transitions. [2023-11-19 07:40:51,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2023-11-19 07:40:51,626 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 880 transitions. [2023-11-19 07:40:51,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 880 transitions. [2023-11-19 07:40:51,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:51,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 880 transitions. [2023-11-19 07:40:51,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,637 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,637 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 300 flow. Second operand 5 states and 880 transitions. [2023-11-19 07:40:51,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 421 flow [2023-11-19 07:40:51,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 389 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-19 07:40:51,643 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 295 flow [2023-11-19 07:40:51,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-19 07:40:51,644 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-19 07:40:51,644 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 295 flow [2023-11-19 07:40:51,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:51,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:51,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:40:51,646 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:51,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:51,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2120693905, now seen corresponding path program 4 times [2023-11-19 07:40:51,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:51,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792118788] [2023-11-19 07:40:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:51,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792118788] [2023-11-19 07:40:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792118788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:51,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:51,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:51,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971483488] [2023-11-19 07:40:51,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:51,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:51,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 432 [2023-11-19 07:40:51,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 295 flow. Second operand has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:51,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 432 [2023-11-19 07:40:51,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:51,973 INFO L124 PetriNetUnfolderBase]: 100/181 cut-off events. [2023-11-19 07:40:51,973 INFO L125 PetriNetUnfolderBase]: For 692/692 co-relation queries the response was YES. [2023-11-19 07:40:51,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 181 events. 100/181 cut-off events. For 692/692 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 31 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 829. Up to 130 conditions per place. [2023-11-19 07:40:51,976 INFO L140 encePairwiseOnDemand]: 427/432 looper letters, 32 selfloop transitions, 9 changer transitions 4/45 dead transitions. [2023-11-19 07:40:51,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 426 flow [2023-11-19 07:40:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:40:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2023-11-19 07:40:51,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097222222222222 [2023-11-19 07:40:51,982 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2023-11-19 07:40:51,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2023-11-19 07:40:51,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:51,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2023-11-19 07:40:51,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,992 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 432.0) internal successors, (2592), 6 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:51,992 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 295 flow. Second operand 5 states and 885 transitions. [2023-11-19 07:40:51,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 426 flow [2023-11-19 07:40:51,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 398 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-19 07:40:52,000 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 304 flow [2023-11-19 07:40:52,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-11-19 07:40:52,001 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-11-19 07:40:52,001 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 304 flow [2023-11-19 07:40:52,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:52,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:52,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:52,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:40:52,003 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:52,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1711639307, now seen corresponding path program 1 times [2023-11-19 07:40:52,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:52,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297788975] [2023-11-19 07:40:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:40:52,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297788975] [2023-11-19 07:40:52,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297788975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:52,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573432395] [2023-11-19 07:40:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:52,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:52,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:52,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:40:52,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:52,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:52,572 INFO L378 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 36 treesize of output 72 [2023-11-19 07:40:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:52,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:52,995 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-11-19 07:40:52,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 135 [2023-11-19 07:40:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573432395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:53,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:40:53,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-11-19 07:40:53,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495317768] [2023-11-19 07:40:53,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:53,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:40:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:40:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:40:54,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 432 [2023-11-19 07:40:54,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 156.53846153846155) internal successors, (2035), 13 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:54,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:40:54,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 432 [2023-11-19 07:40:54,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:40:55,408 INFO L124 PetriNetUnfolderBase]: 271/477 cut-off events. [2023-11-19 07:40:55,409 INFO L125 PetriNetUnfolderBase]: For 1883/1883 co-relation queries the response was YES. [2023-11-19 07:40:55,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2343 conditions, 477 events. 271/477 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1867 event pairs, 25 based on Foata normal form. 25/500 useless extension candidates. Maximal degree in co-relation 2288. Up to 211 conditions per place. [2023-11-19 07:40:55,414 INFO L140 encePairwiseOnDemand]: 423/432 looper letters, 41 selfloop transitions, 22 changer transitions 74/137 dead transitions. [2023-11-19 07:40:55,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 137 transitions, 1279 flow [2023-11-19 07:40:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:40:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:40:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3023 transitions. [2023-11-19 07:40:55,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36829922027290446 [2023-11-19 07:40:55,429 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3023 transitions. [2023-11-19 07:40:55,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3023 transitions. [2023-11-19 07:40:55,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:40:55,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3023 transitions. [2023-11-19 07:40:55,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 159.10526315789474) internal successors, (3023), 19 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:55,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 432.0) internal successors, (8640), 20 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:55,461 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 432.0) internal successors, (8640), 20 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:55,462 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 304 flow. Second operand 19 states and 3023 transitions. [2023-11-19 07:40:55,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 137 transitions, 1279 flow [2023-11-19 07:40:55,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 137 transitions, 1179 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-19 07:40:55,474 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 427 flow [2023-11-19 07:40:55,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2023-11-19 07:40:55,476 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2023-11-19 07:40:55,476 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 427 flow [2023-11-19 07:40:55,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.53846153846155) internal successors, (2035), 13 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:55,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:40:55,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:55,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:55,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:40:55,693 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:40:55,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1153911654, now seen corresponding path program 2 times [2023-11-19 07:40:55,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395933315] [2023-11-19 07:40:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:55,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:40:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395933315] [2023-11-19 07:40:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395933315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546618200] [2023-11-19 07:40:55,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:40:55,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:55,981 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:56,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:56,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:40:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:40:56,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 07:40:56,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:40:56,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:40:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:56,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:57,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:57,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 277 treesize of output 345 [2023-11-19 07:40:57,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:40:57,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 118 treesize of output 168 [2023-11-19 07:41:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546618200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:09,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:09,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2023-11-19 07:41:09,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030518800] [2023-11-19 07:41:09,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:09,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:41:09,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:09,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:41:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=266, Unknown=1, NotChecked=0, Total=342 [2023-11-19 07:41:11,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 432 [2023-11-19 07:41:11,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 427 flow. Second operand has 19 states, 19 states have (on average 125.84210526315789) internal successors, (2391), 19 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:11,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:11,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 432 [2023-11-19 07:41:11,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:11,972 INFO L124 PetriNetUnfolderBase]: 214/388 cut-off events. [2023-11-19 07:41:11,973 INFO L125 PetriNetUnfolderBase]: For 2263/2263 co-relation queries the response was YES. [2023-11-19 07:41:11,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 388 events. 214/388 cut-off events. For 2263/2263 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1424 event pairs, 15 based on Foata normal form. 26/412 useless extension candidates. Maximal degree in co-relation 2302. Up to 176 conditions per place. [2023-11-19 07:41:11,977 INFO L140 encePairwiseOnDemand]: 424/432 looper letters, 49 selfloop transitions, 20 changer transitions 45/114 dead transitions. [2023-11-19 07:41:11,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 1250 flow [2023-11-19 07:41:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:41:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:41:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2062 transitions. [2023-11-19 07:41:11,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29832175925925924 [2023-11-19 07:41:11,988 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2062 transitions. [2023-11-19 07:41:11,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2062 transitions. [2023-11-19 07:41:11,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:11,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2062 transitions. [2023-11-19 07:41:12,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 128.875) internal successors, (2062), 16 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 432.0) internal successors, (7344), 17 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,031 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 432.0) internal successors, (7344), 17 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,032 INFO L175 Difference]: Start difference. First operand has 68 places, 43 transitions, 427 flow. Second operand 16 states and 2062 transitions. [2023-11-19 07:41:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 1250 flow [2023-11-19 07:41:12,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 1067 flow, removed 77 selfloop flow, removed 10 redundant places. [2023-11-19 07:41:12,048 INFO L231 Difference]: Finished difference. Result has 70 places, 41 transitions, 401 flow [2023-11-19 07:41:12,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=401, PETRI_PLACES=70, PETRI_TRANSITIONS=41} [2023-11-19 07:41:12,050 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2023-11-19 07:41:12,050 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 41 transitions, 401 flow [2023-11-19 07:41:12,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 125.84210526315789) internal successors, (2391), 19 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:12,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:12,052 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:12,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:12,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:41:12,273 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:12,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2094783793, now seen corresponding path program 3 times [2023-11-19 07:41:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632694207] [2023-11-19 07:41:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:12,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:12,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632694207] [2023-11-19 07:41:12,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632694207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815501548] [2023-11-19 07:41:12,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:41:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:12,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:12,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:41:12,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:41:12,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:12,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:41:12,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:12,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:41:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:41:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815501548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:41:12,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:41:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-19 07:41:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623808870] [2023-11-19 07:41:12,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:41:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:41:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:41:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:41:13,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 432 [2023-11-19 07:41:13,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 41 transitions, 401 flow. Second operand has 13 states, 13 states have (on average 178.46153846153845) internal successors, (2320), 13 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:13,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:41:13,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 432 [2023-11-19 07:41:13,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:41:13,592 INFO L124 PetriNetUnfolderBase]: 266/466 cut-off events. [2023-11-19 07:41:13,592 INFO L125 PetriNetUnfolderBase]: For 2106/2106 co-relation queries the response was YES. [2023-11-19 07:41:13,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2791 conditions, 466 events. 266/466 cut-off events. For 2106/2106 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1613 event pairs, 31 based on Foata normal form. 56/521 useless extension candidates. Maximal degree in co-relation 2763. Up to 233 conditions per place. [2023-11-19 07:41:13,599 INFO L140 encePairwiseOnDemand]: 428/432 looper letters, 99 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2023-11-19 07:41:13,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 125 transitions, 1369 flow [2023-11-19 07:41:13,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:41:13,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:41:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2022 transitions. [2023-11-19 07:41:13,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255050505050505 [2023-11-19 07:41:13,608 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2022 transitions. [2023-11-19 07:41:13,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2022 transitions. [2023-11-19 07:41:13,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:41:13,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2022 transitions. [2023-11-19 07:41:13,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 183.8181818181818) internal successors, (2022), 11 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:13,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 432.0) internal successors, (5184), 12 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:13,627 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 432.0) internal successors, (5184), 12 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:13,627 INFO L175 Difference]: Start difference. First operand has 70 places, 41 transitions, 401 flow. Second operand 11 states and 2022 transitions. [2023-11-19 07:41:13,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 125 transitions, 1369 flow [2023-11-19 07:41:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 125 transitions, 1273 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-11-19 07:41:13,639 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 573 flow [2023-11-19 07:41:13,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=432, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=573, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2023-11-19 07:41:13,640 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 43 predicate places. [2023-11-19 07:41:13,641 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 573 flow [2023-11-19 07:41:13,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 178.46153846153845) internal successors, (2320), 13 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:41:13,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:41:13,642 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:13,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:41:13,866 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:41:13,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1133666436, now seen corresponding path program 4 times [2023-11-19 07:41:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:13,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582128356] [2023-11-19 07:41:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:17,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:17,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582128356] [2023-11-19 07:41:17,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582128356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:17,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98298791] [2023-11-19 07:41:17,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:41:17,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:17,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:17,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:17,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a05a2356-1ef6-40b3-b458-9a18cbb67bb5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:41:17,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:41:17,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:17,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-19 07:41:17,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:17,407 INFO L378 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:41:17,475 INFO L378 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:41:17,537 INFO L378 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:41:17,919 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2023-11-19 07:41:17,919 INFO L378 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 48 [2023-11-19 07:41:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:41:17,971 INFO L327 TraceCheckSpWp]: Computing backward predicates...