./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/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_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/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_ce72f819-3002-434d-ad1b-b831107be1a8/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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:01,204 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:01,269 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:01,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:01,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:01,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:01,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:01,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:01,304 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:01,305 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:01,306 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:01,306 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:01,307 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:01,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:01,309 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:01,309 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:01,310 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:01,311 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:01,311 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:01,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:01,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:01,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:01,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:01,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:01,333 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:01,335 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:01,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:01,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:01,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:01,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:01,338 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:01,338 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:01,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:01,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:01,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:01,340 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:01,340 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:01,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:01,341 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:01,341 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_ce72f819-3002-434d-ad1b-b831107be1a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2023-11-19 07:55:01,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:01,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:01,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:01,636 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:01,637 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:01,638 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-19 07:55:04,774 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:05,027 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:05,028 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-11-19 07:55:05,038 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/data/44182c2d3/fdb2abaf95664572ab0d5642a7cec5e7/FLAG5a5f1a370 [2023-11-19 07:55:05,056 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/data/44182c2d3/fdb2abaf95664572ab0d5642a7cec5e7 [2023-11-19 07:55:05,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:05,065 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:05,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:05,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:05,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:05,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1e7b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05, skipping insertion in model container [2023-11-19 07:55:05,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,111 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:05,344 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_ce72f819-3002-434d-ad1b-b831107be1a8/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2023-11-19 07:55:05,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:05,361 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:05,386 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_ce72f819-3002-434d-ad1b-b831107be1a8/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c[2502,2515] [2023-11-19 07:55:05,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:05,396 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:05,396 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:55:05,405 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:05,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05 WrapperNode [2023-11-19 07:55:05,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:05,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:05,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:05,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:05,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,445 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2023-11-19 07:55:05,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:05,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:05,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:05,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:05,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:05,498 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:05,498 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:05,498 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:05,499 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (1/1) ... [2023-11-19 07:55:05,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:05,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:05,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:05,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:55:05,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:55:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:55:05,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:55:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:55:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:55:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:55:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:55:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:05,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:55:05,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:55:05,598 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 07:55:05,741 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:05,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:05,973 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:06,080 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:06,087 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:55:06,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:06 BoogieIcfgContainer [2023-11-19 07:55:06,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:06,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:06,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:06,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:06,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:05" (1/3) ... [2023-11-19 07:55:06,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62113cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:06, skipping insertion in model container [2023-11-19 07:55:06,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:05" (2/3) ... [2023-11-19 07:55:06,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62113cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:06, skipping insertion in model container [2023-11-19 07:55:06,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:06" (3/3) ... [2023-11-19 07:55:06,102 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-11-19 07:55:06,111 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:55:06,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:06,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:06,124 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:55:06,214 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:55:06,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 190 flow [2023-11-19 07:55:06,383 INFO L124 PetriNetUnfolderBase]: 6/86 cut-off events. [2023-11-19 07:55:06,386 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:55:06,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 6/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-19 07:55:06,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 190 flow [2023-11-19 07:55:06,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 77 transitions, 166 flow [2023-11-19 07:55:06,403 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:06,413 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 77 transitions, 166 flow [2023-11-19 07:55:06,417 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 77 transitions, 166 flow [2023-11-19 07:55:06,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 166 flow [2023-11-19 07:55:06,469 INFO L124 PetriNetUnfolderBase]: 6/77 cut-off events. [2023-11-19 07:55:06,475 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:55:06,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-19 07:55:06,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 462 [2023-11-19 07:55:09,265 INFO L134 LiptonReduction]: Checked pairs total: 659 [2023-11-19 07:55:09,266 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-11-19 07:55:09,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:09,288 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;@693f0938, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:09,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:55:09,295 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:55:09,295 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-19 07:55:09,295 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:55:09,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:09,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:09,297 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 07:55:09,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1215181858, now seen corresponding path program 1 times [2023-11-19 07:55:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:09,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114896190] [2023-11-19 07:55:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,890 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 07:55:09,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114896190] [2023-11-19 07:55:09,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114896190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:09,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:09,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702268752] [2023-11-19 07:55:09,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:09,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:09,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 160 [2023-11-19 07:55:10,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 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 07:55:10,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:10,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 160 [2023-11-19 07:55:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:10,149 INFO L124 PetriNetUnfolderBase]: 82/153 cut-off events. [2023-11-19 07:55:10,150 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-19 07:55:10,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 153 events. 82/153 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 433 event pairs, 9 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 255. Up to 79 conditions per place. [2023-11-19 07:55:10,156 INFO L140 encePairwiseOnDemand]: 156/160 looper letters, 27 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-19 07:55:10,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 140 flow [2023-11-19 07:55:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2023-11-19 07:55:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2023-11-19 07:55:10,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 315 transitions. [2023-11-19 07:55:10,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 315 transitions. [2023-11-19 07:55:10,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:10,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 315 transitions. [2023-11-19 07:55:10,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 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 07:55:10,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 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 07:55:10,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 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 07:55:10,213 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 4 states and 315 transitions. [2023-11-19 07:55:10,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 140 flow [2023-11-19 07:55:10,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:10,220 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 52 flow [2023-11-19 07:55:10,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-11-19 07:55:10,228 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 0 predicate places. [2023-11-19 07:55:10,229 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 52 flow [2023-11-19 07:55:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 0 states have call successors, (0), 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 07:55:10,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:10,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:10,230 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 07:55:10,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1357457851, now seen corresponding path program 1 times [2023-11-19 07:55:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357646228] [2023-11-19 07:55:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:10,555 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 07:55:10,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:10,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357646228] [2023-11-19 07:55:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357646228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:10,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712772618] [2023-11-19 07:55:10,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:10,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:10,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 160 [2023-11-19 07:55:10,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 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 07:55:10,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:10,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 160 [2023-11-19 07:55:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:10,748 INFO L124 PetriNetUnfolderBase]: 101/178 cut-off events. [2023-11-19 07:55:10,748 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-19 07:55:10,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 178 events. 101/178 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 487 event pairs, 13 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 125. Up to 159 conditions per place. [2023-11-19 07:55:10,751 INFO L140 encePairwiseOnDemand]: 155/160 looper letters, 25 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-11-19 07:55:10,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 30 transitions, 144 flow [2023-11-19 07:55:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:55:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:55:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 306 transitions. [2023-11-19 07:55:10,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2023-11-19 07:55:10,754 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 306 transitions. [2023-11-19 07:55:10,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 306 transitions. [2023-11-19 07:55:10,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:10,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 306 transitions. [2023-11-19 07:55:10,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 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 07:55:10,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 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 07:55:10,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 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 07:55:10,761 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 52 flow. Second operand 4 states and 306 transitions. [2023-11-19 07:55:10,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 30 transitions, 144 flow [2023-11-19 07:55:10,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:10,763 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 80 flow [2023-11-19 07:55:10,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-19 07:55:10,764 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-19 07:55:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 80 flow [2023-11-19 07:55:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 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 07:55:10,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:10,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:10,766 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 07:55:10,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1211954969, now seen corresponding path program 2 times [2023-11-19 07:55:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948292343] [2023-11-19 07:55:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:10,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948292343] [2023-11-19 07:55:10,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948292343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:10,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:10,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:55:10,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184626572] [2023-11-19 07:55:10,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:10,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:55:10,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:10,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:55:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:11,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 160 [2023-11-19 07:55:11,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 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 07:55:11,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:11,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 160 [2023-11-19 07:55:11,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:11,171 INFO L124 PetriNetUnfolderBase]: 133/232 cut-off events. [2023-11-19 07:55:11,171 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-11-19 07:55:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 232 events. 133/232 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 729 event pairs, 25 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 210. Up to 165 conditions per place. [2023-11-19 07:55:11,177 INFO L140 encePairwiseOnDemand]: 154/160 looper letters, 34 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-19 07:55:11,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 40 transitions, 215 flow [2023-11-19 07:55:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 384 transitions. [2023-11-19 07:55:11,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-19 07:55:11,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 384 transitions. [2023-11-19 07:55:11,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 384 transitions. [2023-11-19 07:55:11,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:11,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 384 transitions. [2023-11-19 07:55:11,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 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 07:55:11,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 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 07:55:11,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 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 07:55:11,188 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 80 flow. Second operand 5 states and 384 transitions. [2023-11-19 07:55:11,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 40 transitions, 215 flow [2023-11-19 07:55:11,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:11,192 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 101 flow [2023-11-19 07:55:11,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-11-19 07:55:11,194 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-11-19 07:55:11,197 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 101 flow [2023-11-19 07:55:11,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 0 states have call successors, (0), 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 07:55:11,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:11,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:11,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:55:11,199 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 07:55:11,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1848798363, now seen corresponding path program 3 times [2023-11-19 07:55:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048039731] [2023-11-19 07:55:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:12,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048039731] [2023-11-19 07:55:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048039731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526567085] [2023-11-19 07:55:12,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:12,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:12,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:12,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:12,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:55:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:12,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:55:12,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:14,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:15,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526567085] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:15,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:15,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 17 [2023-11-19 07:55:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276232831] [2023-11-19 07:55:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:15,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=264, Unknown=1, NotChecked=0, Total=342 [2023-11-19 07:55:15,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2023-11-19 07:55:15,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 101 flow. Second operand has 8 states, 8 states have (on average 60.875) internal successors, (487), 8 states have internal predecessors, (487), 0 states have call successors, (0), 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 07:55:15,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:15,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2023-11-19 07:55:15,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:16,419 INFO L124 PetriNetUnfolderBase]: 277/481 cut-off events. [2023-11-19 07:55:16,419 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2023-11-19 07:55:16,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 481 events. 277/481 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1909 event pairs, 1 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 505. Up to 111 conditions per place. [2023-11-19 07:55:16,425 INFO L140 encePairwiseOnDemand]: 151/160 looper letters, 64 selfloop transitions, 42 changer transitions 11/117 dead transitions. [2023-11-19 07:55:16,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 117 transitions, 672 flow [2023-11-19 07:55:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:55:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:55:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1052 transitions. [2023-11-19 07:55:16,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109375 [2023-11-19 07:55:16,432 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1052 transitions. [2023-11-19 07:55:16,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1052 transitions. [2023-11-19 07:55:16,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:16,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1052 transitions. [2023-11-19 07:55:16,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.75) internal successors, (1052), 16 states have internal predecessors, (1052), 0 states have call successors, (0), 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 07:55:16,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 160.0) internal successors, (2720), 17 states have internal predecessors, (2720), 0 states have call successors, (0), 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 07:55:16,447 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 160.0) internal successors, (2720), 17 states have internal predecessors, (2720), 0 states have call successors, (0), 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 07:55:16,448 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 101 flow. Second operand 16 states and 1052 transitions. [2023-11-19 07:55:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 117 transitions, 672 flow [2023-11-19 07:55:16,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 117 transitions, 658 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:55:16,454 INFO L231 Difference]: Finished difference. Result has 49 places, 63 transitions, 399 flow [2023-11-19 07:55:16,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=399, PETRI_PLACES=49, PETRI_TRANSITIONS=63} [2023-11-19 07:55:16,456 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 27 predicate places. [2023-11-19 07:55:16,456 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 63 transitions, 399 flow [2023-11-19 07:55:16,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 60.875) internal successors, (487), 8 states have internal predecessors, (487), 0 states have call successors, (0), 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 07:55:16,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:16,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:16,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:16,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:16,673 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 07:55:16,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash 902413345, now seen corresponding path program 4 times [2023-11-19 07:55:16,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:16,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856003154] [2023-11-19 07:55:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:16,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:16,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:16,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856003154] [2023-11-19 07:55:16,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856003154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:16,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:16,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:16,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121258293] [2023-11-19 07:55:16,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:16,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:16,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 160 [2023-11-19 07:55:16,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 63 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 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 07:55:16,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:16,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 160 [2023-11-19 07:55:16,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:17,007 INFO L124 PetriNetUnfolderBase]: 278/479 cut-off events. [2023-11-19 07:55:17,007 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-11-19 07:55:17,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1898 conditions, 479 events. 278/479 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1771 event pairs, 18 based on Foata normal form. 20/499 useless extension candidates. Maximal degree in co-relation 1874. Up to 266 conditions per place. [2023-11-19 07:55:17,014 INFO L140 encePairwiseOnDemand]: 155/160 looper letters, 87 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2023-11-19 07:55:17,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 107 transitions, 878 flow [2023-11-19 07:55:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 392 transitions. [2023-11-19 07:55:17,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2023-11-19 07:55:17,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 392 transitions. [2023-11-19 07:55:17,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 392 transitions. [2023-11-19 07:55:17,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:17,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 392 transitions. [2023-11-19 07:55:17,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.4) internal successors, (392), 5 states have internal predecessors, (392), 0 states have call successors, (0), 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 07:55:17,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 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 07:55:17,025 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 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 07:55:17,025 INFO L175 Difference]: Start difference. First operand has 49 places, 63 transitions, 399 flow. Second operand 5 states and 392 transitions. [2023-11-19 07:55:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 107 transitions, 878 flow [2023-11-19 07:55:17,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 107 transitions, 794 flow, removed 37 selfloop flow, removed 4 redundant places. [2023-11-19 07:55:17,042 INFO L231 Difference]: Finished difference. Result has 51 places, 73 transitions, 502 flow [2023-11-19 07:55:17,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=502, PETRI_PLACES=51, PETRI_TRANSITIONS=73} [2023-11-19 07:55:17,045 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-11-19 07:55:17,045 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 73 transitions, 502 flow [2023-11-19 07:55:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 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 07:55:17,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:17,046 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 07:55:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:17,047 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 07:55:17,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2003139851, now seen corresponding path program 1 times [2023-11-19 07:55:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:17,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137722861] [2023-11-19 07:55:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:17,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137722861] [2023-11-19 07:55:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137722861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:17,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951256816] [2023-11-19 07:55:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:17,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:17,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:17,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:17,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:55:17,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:18,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951256816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:19,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:19,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-19 07:55:19,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849466402] [2023-11-19 07:55:19,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:19,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:55:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:55:19,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:55:20,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2023-11-19 07:55:20,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 73 transitions, 502 flow. Second operand has 22 states, 22 states have (on average 61.31818181818182) internal successors, (1349), 22 states have internal predecessors, (1349), 0 states have call successors, (0), 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 07:55:20,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:20,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2023-11-19 07:55:20,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:27,262 INFO L124 PetriNetUnfolderBase]: 840/1461 cut-off events. [2023-11-19 07:55:27,262 INFO L125 PetriNetUnfolderBase]: For 3439/3439 co-relation queries the response was YES. [2023-11-19 07:55:27,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5804 conditions, 1461 events. 840/1461 cut-off events. For 3439/3439 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7529 event pairs, 12 based on Foata normal form. 8/1399 useless extension candidates. Maximal degree in co-relation 4629. Up to 285 conditions per place. [2023-11-19 07:55:27,279 INFO L140 encePairwiseOnDemand]: 150/160 looper letters, 137 selfloop transitions, 203 changer transitions 93/433 dead transitions. [2023-11-19 07:55:27,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 433 transitions, 3440 flow [2023-11-19 07:55:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-19 07:55:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-11-19 07:55:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3960 transitions. [2023-11-19 07:55:27,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2023-11-19 07:55:27,299 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3960 transitions. [2023-11-19 07:55:27,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3960 transitions. [2023-11-19 07:55:27,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:27,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3960 transitions. [2023-11-19 07:55:27,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 63.87096774193548) internal successors, (3960), 62 states have internal predecessors, (3960), 0 states have call successors, (0), 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 07:55:27,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 160.0) internal successors, (10080), 63 states have internal predecessors, (10080), 0 states have call successors, (0), 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 07:55:27,342 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 160.0) internal successors, (10080), 63 states have internal predecessors, (10080), 0 states have call successors, (0), 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 07:55:27,342 INFO L175 Difference]: Start difference. First operand has 51 places, 73 transitions, 502 flow. Second operand 62 states and 3960 transitions. [2023-11-19 07:55:27,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 433 transitions, 3440 flow [2023-11-19 07:55:27,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 433 transitions, 3384 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:27,369 INFO L231 Difference]: Finished difference. Result has 154 places, 254 transitions, 2567 flow [2023-11-19 07:55:27,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=2567, PETRI_PLACES=154, PETRI_TRANSITIONS=254} [2023-11-19 07:55:27,372 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2023-11-19 07:55:27,372 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 254 transitions, 2567 flow [2023-11-19 07:55:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.31818181818182) internal successors, (1349), 22 states have internal predecessors, (1349), 0 states have call successors, (0), 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 07:55:27,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:27,373 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 07:55:27,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:27,589 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 07:55:27,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1045978201, now seen corresponding path program 2 times [2023-11-19 07:55:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986030879] [2023-11-19 07:55:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:28,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:28,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986030879] [2023-11-19 07:55:28,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986030879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580517376] [2023-11-19 07:55:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:28,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:28,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:28,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:28,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:28,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:28,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:55:28,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:29,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:30,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580517376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:30,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-11-19 07:55:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778667956] [2023-11-19 07:55:30,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:30,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:55:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:55:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:55:30,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 160 [2023-11-19 07:55:30,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 254 transitions, 2567 flow. Second operand has 20 states, 20 states have (on average 62.2) internal successors, (1244), 20 states have internal predecessors, (1244), 0 states have call successors, (0), 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 07:55:30,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:30,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 160 [2023-11-19 07:55:30,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:39,147 INFO L124 PetriNetUnfolderBase]: 1269/2254 cut-off events. [2023-11-19 07:55:39,148 INFO L125 PetriNetUnfolderBase]: For 39158/39158 co-relation queries the response was YES. [2023-11-19 07:55:39,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13711 conditions, 2254 events. 1269/2254 cut-off events. For 39158/39158 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13022 event pairs, 39 based on Foata normal form. 24/2240 useless extension candidates. Maximal degree in co-relation 13589. Up to 652 conditions per place. [2023-11-19 07:55:39,184 INFO L140 encePairwiseOnDemand]: 151/160 looper letters, 256 selfloop transitions, 268 changer transitions 123/647 dead transitions. [2023-11-19 07:55:39,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 647 transitions, 7494 flow [2023-11-19 07:55:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-19 07:55:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-19 07:55:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3780 transitions. [2023-11-19 07:55:39,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073275862068966 [2023-11-19 07:55:39,295 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3780 transitions. [2023-11-19 07:55:39,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3780 transitions. [2023-11-19 07:55:39,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:39,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3780 transitions. [2023-11-19 07:55:39,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 65.17241379310344) internal successors, (3780), 58 states have internal predecessors, (3780), 0 states have call successors, (0), 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 07:55:39,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 160.0) internal successors, (9440), 59 states have internal predecessors, (9440), 0 states have call successors, (0), 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 07:55:39,340 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 160.0) internal successors, (9440), 59 states have internal predecessors, (9440), 0 states have call successors, (0), 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 07:55:39,341 INFO L175 Difference]: Start difference. First operand has 154 places, 254 transitions, 2567 flow. Second operand 58 states and 3780 transitions. [2023-11-19 07:55:39,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 647 transitions, 7494 flow [2023-11-19 07:55:39,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 647 transitions, 7214 flow, removed 131 selfloop flow, removed 15 redundant places. [2023-11-19 07:55:39,580 INFO L231 Difference]: Finished difference. Result has 220 places, 408 transitions, 5112 flow [2023-11-19 07:55:39,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=5112, PETRI_PLACES=220, PETRI_TRANSITIONS=408} [2023-11-19 07:55:39,581 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-11-19 07:55:39,581 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 408 transitions, 5112 flow [2023-11-19 07:55:39,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.2) internal successors, (1244), 20 states have internal predecessors, (1244), 0 states have call successors, (0), 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 07:55:39,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:39,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:39,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:39,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:55:39,804 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 07:55:39,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1672422994, now seen corresponding path program 3 times [2023-11-19 07:55:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:39,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587481019] [2023-11-19 07:55:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:39,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:41,442 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 07:55:41,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587481019] [2023-11-19 07:55:41,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587481019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445534591] [2023-11-19 07:55:41,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:41,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:41,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:41,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce72f819-3002-434d-ad1b-b831107be1a8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:41,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:55:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:41,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 07:55:41,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:42,291 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 07:55:42,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445534591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:43,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:43,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-11-19 07:55:43,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562916112] [2023-11-19 07:55:43,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 07:55:43,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 07:55:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2023-11-19 07:55:44,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 160 [2023-11-19 07:55:44,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 408 transitions, 5112 flow. Second operand has 27 states, 27 states have (on average 60.925925925925924) internal successors, (1645), 27 states have internal predecessors, (1645), 0 states have call successors, (0), 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 07:55:44,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:44,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 160 [2023-11-19 07:55:44,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand