./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx --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 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:17:47,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:17:47,786 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:17:47,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:17:47,793 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:17:47,818 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:17:47,819 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:17:47,820 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:17:47,821 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:17:47,821 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:17:47,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:17:47,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:17:47,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:17:47,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:17:47,825 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:17:47,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:17:47,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:17:47,826 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:17:47,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:17:47,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:17:47,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:17:47,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:17:47,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:17:47,832 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:17:47,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:17:47,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:17:47,834 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:17:47,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:17:47,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:17:47,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:17:47,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:17:47,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:47,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:17:47,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:17:47,837 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:17:47,838 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:17:47,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:17:47,838 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:17:47,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:17:47,839 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:17:47,839 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:17:47,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:17:47,840 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_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2023-11-21 22:17:48,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:17:48,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:17:48,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:17:48,161 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:17:48,162 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:17:48,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2023-11-21 22:17:51,276 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:17:51,525 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:17:51,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/sv-benchmarks/c/pthread/triangular-longer-1.i [2023-11-21 22:17:51,552 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/data/13ac9e921/10aeb628dd134b658485535bb4dd6125/FLAG818d6e7da [2023-11-21 22:17:51,564 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/data/13ac9e921/10aeb628dd134b658485535bb4dd6125 [2023-11-21 22:17:51,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:17:51,568 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:17:51,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:17:51,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:17:51,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:17:51,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:17:51" (1/1) ... [2023-11-21 22:17:51,585 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab35bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:51, skipping insertion in model container [2023-11-21 22:17:51,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:17:51" (1/1) ... [2023-11-21 22:17:51,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:17:52,120 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_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2023-11-21 22:17:52,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:17:52,136 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:17:52,194 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_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2023-11-21 22:17:52,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:17:52,245 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:17:52,245 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 22:17:52,254 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:17:52,254 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52 WrapperNode [2023-11-21 22:17:52,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:17:52,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:17:52,257 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:17:52,257 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:17:52,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,326 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-11-21 22:17:52,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:17:52,327 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:17:52,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:17:52,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:17:52,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,347 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,363 INFO L187 HeapSplitter]: Split 4 memory accesses to 3 slices as follows [2, 1, 1] [2023-11-21 22:17:52,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:17:52,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:17:52,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:17:52,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:17:52,407 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (1/1) ... [2023-11-21 22:17:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:17:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:52,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:17:52,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:17:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-21 22:17:52,492 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-21 22:17:52,493 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-21 22:17:52,493 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-21 22:17:52,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:17:52,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:17:52,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-21 22:17:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 22:17:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:17:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:17:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:17:52,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:17:52,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:17:52,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-21 22:17:52,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 22:17:52,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:17:52,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:17:52,497 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 22:17:52,636 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:17:52,647 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:17:52,818 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:17:52,962 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:17:52,962 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:17:52,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:17:52 BoogieIcfgContainer [2023-11-21 22:17:52,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:17:52,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:17:52,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:17:52,970 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:17:52,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:17:51" (1/3) ... [2023-11-21 22:17:52,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5087531b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:17:52, skipping insertion in model container [2023-11-21 22:17:52,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:17:52" (2/3) ... [2023-11-21 22:17:52,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5087531b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:17:52, skipping insertion in model container [2023-11-21 22:17:52,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:17:52" (3/3) ... [2023-11-21 22:17:52,978 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-11-21 22:17:52,987 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-21 22:17:52,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:17:52,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:17:52,999 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:17:53,038 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 22:17:53,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2023-11-21 22:17:53,100 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-21 22:17:53,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:17:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2023-11-21 22:17:53,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2023-11-21 22:17:53,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2023-11-21 22:17:53,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:17:53,129 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;@aa5e4eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:17:53,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-21 22:17:53,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:17:53,141 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2023-11-21 22:17:53,141 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:17:53,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:53,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:53,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:53,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1796875976, now seen corresponding path program 1 times [2023-11-21 22:17:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653323875] [2023-11-21 22:17:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653323875] [2023-11-21 22:17:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653323875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:53,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:53,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:17:53,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793338420] [2023-11-21 22:17:53,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:53,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:17:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:17:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:17:53,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:53,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-11-21 22:17:53,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:53,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:54,048 INFO L124 PetriNetUnfolderBase]: 321/543 cut-off events. [2023-11-21 22:17:54,049 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 22:17:54,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 543 events. 321/543 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2187 event pairs, 62 based on Foata normal form. 12/542 useless extension candidates. Maximal degree in co-relation 1045. Up to 221 conditions per place. [2023-11-21 22:17:54,079 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2023-11-21 22:17:54,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2023-11-21 22:17:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:17:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:17:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2023-11-21 22:17:54,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-21 22:17:54,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 84 transitions. [2023-11-21 22:17:54,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 84 transitions. [2023-11-21 22:17:54,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:54,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 84 transitions. [2023-11-21 22:17:54,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2023-11-21 22:17:54,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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) [2023-11-21 22:17:54,104 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 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) [2023-11-21 22:17:54,105 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2023-11-21 22:17:54,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2023-11-21 22:17:54,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:17:54,112 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2023-11-21 22:17:54,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-11-21 22:17:54,117 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-11-21 22:17:54,118 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2023-11-21 22:17:54,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-11-21 22:17:54,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:54,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:54,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:17:54,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:54,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash 676521124, now seen corresponding path program 1 times [2023-11-21 22:17:54,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:54,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406609921] [2023-11-21 22:17:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:54,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:54,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406609921] [2023-11-21 22:17:54,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406609921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:54,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:54,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:17:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393753341] [2023-11-21 22:17:54,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:54,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:17:54,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:17:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:17:54,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:54,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2023-11-21 22:17:54,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:54,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:54,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:54,534 INFO L124 PetriNetUnfolderBase]: 382/689 cut-off events. [2023-11-21 22:17:54,534 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2023-11-21 22:17:54,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 689 events. 382/689 cut-off events. For 285/291 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2910 event pairs, 65 based on Foata normal form. 33/721 useless extension candidates. Maximal degree in co-relation 1572. Up to 246 conditions per place. [2023-11-21 22:17:54,543 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2023-11-21 22:17:54,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2023-11-21 22:17:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:17:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-21 22:17:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2023-11-21 22:17:54,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-21 22:17:54,547 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2023-11-21 22:17:54,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2023-11-21 22:17:54,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:54,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2023-11-21 22:17:54,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 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) [2023-11-21 22:17:54,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 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) [2023-11-21 22:17:54,552 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 24.0) internal successors, (240), 10 states have internal predecessors, (240), 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) [2023-11-21 22:17:54,552 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2023-11-21 22:17:54,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2023-11-21 22:17:54,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-21 22:17:54,558 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2023-11-21 22:17:54,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-11-21 22:17:54,560 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-21 22:17:54,560 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2023-11-21 22:17:54,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2023-11-21 22:17:54,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:54,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:54,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:17:54,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:54,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:54,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1193097064, now seen corresponding path program 2 times [2023-11-21 22:17:54,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:54,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467997244] [2023-11-21 22:17:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:54,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:54,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467997244] [2023-11-21 22:17:54,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467997244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:54,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:54,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:17:54,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684574983] [2023-11-21 22:17:54,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:54,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:17:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:17:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:17:54,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:54,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2023-11-21 22:17:54,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:54,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:54,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:55,022 INFO L124 PetriNetUnfolderBase]: 328/605 cut-off events. [2023-11-21 22:17:55,023 INFO L125 PetriNetUnfolderBase]: For 1004/1016 co-relation queries the response was YES. [2023-11-21 22:17:55,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 605 events. 328/605 cut-off events. For 1004/1016 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2525 event pairs, 65 based on Foata normal form. 57/661 useless extension candidates. Maximal degree in co-relation 1713. Up to 234 conditions per place. [2023-11-21 22:17:55,029 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2023-11-21 22:17:55,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2023-11-21 22:17:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:17:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:17:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2023-11-21 22:17:55,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2023-11-21 22:17:55,035 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 103 transitions. [2023-11-21 22:17:55,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 103 transitions. [2023-11-21 22:17:55,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:55,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 103 transitions. [2023-11-21 22:17:55,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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) [2023-11-21 22:17:55,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 24.0) internal successors, (216), 9 states have internal predecessors, (216), 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) [2023-11-21 22:17:55,043 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 24.0) internal successors, (216), 9 states have internal predecessors, (216), 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) [2023-11-21 22:17:55,043 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2023-11-21 22:17:55,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2023-11-21 22:17:55,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-21 22:17:55,055 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2023-11-21 22:17:55,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2023-11-21 22:17:55,056 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2023-11-21 22:17:55,056 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2023-11-21 22:17:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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) [2023-11-21 22:17:55,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:55,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:55,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:17:55,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:55,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash -330137667, now seen corresponding path program 1 times [2023-11-21 22:17:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:55,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752155362] [2023-11-21 22:17:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752155362] [2023-11-21 22:17:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752155362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:55,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:17:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97998825] [2023-11-21 22:17:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:55,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:17:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:17:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:17:55,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:55,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2023-11-21 22:17:55,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:55,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:55,631 INFO L124 PetriNetUnfolderBase]: 337/617 cut-off events. [2023-11-21 22:17:55,631 INFO L125 PetriNetUnfolderBase]: For 1706/1718 co-relation queries the response was YES. [2023-11-21 22:17:55,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 617 events. 337/617 cut-off events. For 1706/1718 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2588 event pairs, 68 based on Foata normal form. 30/646 useless extension candidates. Maximal degree in co-relation 1916. Up to 237 conditions per place. [2023-11-21 22:17:55,638 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2023-11-21 22:17:55,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2023-11-21 22:17:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:17:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:17:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2023-11-21 22:17:55,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-21 22:17:55,641 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 135 transitions. [2023-11-21 22:17:55,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 135 transitions. [2023-11-21 22:17:55,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:55,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 135 transitions. [2023-11-21 22:17:55,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 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) [2023-11-21 22:17:55,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2023-11-21 22:17:55,643 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2023-11-21 22:17:55,643 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2023-11-21 22:17:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2023-11-21 22:17:55,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-11-21 22:17:55,654 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2023-11-21 22:17:55,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=279, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-11-21 22:17:55,655 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-11-21 22:17:55,655 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2023-11-21 22:17:55,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2023-11-21 22:17:55,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:55,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:55,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:17:55,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2091272465, now seen corresponding path program 2 times [2023-11-21 22:17:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079327033] [2023-11-21 22:17:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:55,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:55,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079327033] [2023-11-21 22:17:55,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079327033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:55,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:55,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:17:55,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793696921] [2023-11-21 22:17:55,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:55,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:17:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:55,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:17:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:17:55,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:55,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2023-11-21 22:17:55,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:55,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:55,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:56,139 INFO L124 PetriNetUnfolderBase]: 508/929 cut-off events. [2023-11-21 22:17:56,139 INFO L125 PetriNetUnfolderBase]: For 3228/3246 co-relation queries the response was YES. [2023-11-21 22:17:56,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 929 events. 508/929 cut-off events. For 3228/3246 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4226 event pairs, 53 based on Foata normal form. 45/971 useless extension candidates. Maximal degree in co-relation 3046. Up to 253 conditions per place. [2023-11-21 22:17:56,150 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 57 selfloop transitions, 20 changer transitions 23/103 dead transitions. [2023-11-21 22:17:56,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 771 flow [2023-11-21 22:17:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:17:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:17:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2023-11-21 22:17:56,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2023-11-21 22:17:56,152 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 141 transitions. [2023-11-21 22:17:56,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 141 transitions. [2023-11-21 22:17:56,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:56,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 141 transitions. [2023-11-21 22:17:56,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 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) [2023-11-21 22:17:56,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2023-11-21 22:17:56,155 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2023-11-21 22:17:56,155 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 11 states and 141 transitions. [2023-11-21 22:17:56,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 771 flow [2023-11-21 22:17:56,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 705 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-21 22:17:56,170 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 376 flow [2023-11-21 22:17:56,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=376, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2023-11-21 22:17:56,173 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2023-11-21 22:17:56,174 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 376 flow [2023-11-21 22:17:56,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2023-11-21 22:17:56,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:56,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:56,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:17:56,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:56,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1387768189, now seen corresponding path program 3 times [2023-11-21 22:17:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374755009] [2023-11-21 22:17:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:56,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:56,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374755009] [2023-11-21 22:17:56,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374755009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:17:56,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:17:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:17:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541474147] [2023-11-21 22:17:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:17:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:17:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:17:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:17:56,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:56,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2023-11-21 22:17:56,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:56,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:56,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:56,645 INFO L124 PetriNetUnfolderBase]: 481/884 cut-off events. [2023-11-21 22:17:56,645 INFO L125 PetriNetUnfolderBase]: For 5148/5166 co-relation queries the response was YES. [2023-11-21 22:17:56,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 884 events. 481/884 cut-off events. For 5148/5166 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3985 event pairs, 59 based on Foata normal form. 63/944 useless extension candidates. Maximal degree in co-relation 3352. Up to 154 conditions per place. [2023-11-21 22:17:56,655 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 45 selfloop transitions, 25 changer transitions 33/106 dead transitions. [2023-11-21 22:17:56,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 964 flow [2023-11-21 22:17:56,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:17:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:17:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2023-11-21 22:17:56,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-21 22:17:56,657 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 138 transitions. [2023-11-21 22:17:56,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 138 transitions. [2023-11-21 22:17:56,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:56,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 138 transitions. [2023-11-21 22:17:56,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 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) [2023-11-21 22:17:56,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2023-11-21 22:17:56,660 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 24.0) internal successors, (288), 12 states have internal predecessors, (288), 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) [2023-11-21 22:17:56,660 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 376 flow. Second operand 11 states and 138 transitions. [2023-11-21 22:17:56,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 964 flow [2023-11-21 22:17:56,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 893 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-11-21 22:17:56,684 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 475 flow [2023-11-21 22:17:56,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=475, PETRI_PLACES=73, PETRI_TRANSITIONS=48} [2023-11-21 22:17:56,685 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2023-11-21 22:17:56,685 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 475 flow [2023-11-21 22:17:56,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 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) [2023-11-21 22:17:56,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:56,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:56,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:17:56,686 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:56,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:56,687 INFO L85 PathProgramCache]: Analyzing trace with hash 118051405, now seen corresponding path program 1 times [2023-11-21 22:17:56,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:56,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138018835] [2023-11-21 22:17:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:56,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138018835] [2023-11-21 22:17:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138018835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11864926] [2023-11-21 22:17:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:56,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:56,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:56,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:17:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:56,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:17:56,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:57,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:57,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11864926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:17:57,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:17:57,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-21 22:17:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783865518] [2023-11-21 22:17:57,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:17:57,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:17:57,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:17:57,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:57,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 48 transitions, 475 flow. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2023-11-21 22:17:57,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:57,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:57,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:57,848 INFO L124 PetriNetUnfolderBase]: 589/1094 cut-off events. [2023-11-21 22:17:57,848 INFO L125 PetriNetUnfolderBase]: For 10448/10466 co-relation queries the response was YES. [2023-11-21 22:17:57,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4735 conditions, 1094 events. 589/1094 cut-off events. For 10448/10466 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4684 event pairs, 149 based on Foata normal form. 81/1174 useless extension candidates. Maximal degree in co-relation 4699. Up to 522 conditions per place. [2023-11-21 22:17:57,862 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 67 selfloop transitions, 17 changer transitions 67/154 dead transitions. [2023-11-21 22:17:57,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 154 transitions, 1547 flow [2023-11-21 22:17:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:17:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-21 22:17:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2023-11-21 22:17:57,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-11-21 22:17:57,865 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 231 transitions. [2023-11-21 22:17:57,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 231 transitions. [2023-11-21 22:17:57,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:57,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 231 transitions. [2023-11-21 22:17:57,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.157894736842104) internal successors, (231), 19 states have internal predecessors, (231), 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) [2023-11-21 22:17:57,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 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) [2023-11-21 22:17:57,868 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 24.0) internal successors, (480), 20 states have internal predecessors, (480), 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) [2023-11-21 22:17:57,868 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 475 flow. Second operand 19 states and 231 transitions. [2023-11-21 22:17:57,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 154 transitions, 1547 flow [2023-11-21 22:17:57,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1448 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-21 22:17:57,894 INFO L231 Difference]: Finished difference. Result has 93 places, 54 transitions, 604 flow [2023-11-21 22:17:57,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=604, PETRI_PLACES=93, PETRI_TRANSITIONS=54} [2023-11-21 22:17:57,895 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-11-21 22:17:57,896 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 54 transitions, 604 flow [2023-11-21 22:17:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2023-11-21 22:17:57,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:57,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:57,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:58,120 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:58,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:58,120 INFO L85 PathProgramCache]: Analyzing trace with hash 220173143, now seen corresponding path program 2 times [2023-11-21 22:17:58,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:58,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138348553] [2023-11-21 22:17:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:58,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138348553] [2023-11-21 22:17:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138348553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838044136] [2023-11-21 22:17:58,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:17:58,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:58,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:58,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:17:58,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:17:58,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:17:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:17:58,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:17:58,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:17:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:58,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:17:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:58,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838044136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:17:58,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:17:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-21 22:17:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912120095] [2023-11-21 22:17:58,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:17:58,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:17:58,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:17:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:17:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:17:58,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:17:58,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 54 transitions, 604 flow. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2023-11-21 22:17:58,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:17:58,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:17:58,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:17:59,492 INFO L124 PetriNetUnfolderBase]: 877/1613 cut-off events. [2023-11-21 22:17:59,493 INFO L125 PetriNetUnfolderBase]: For 36545/36563 co-relation queries the response was YES. [2023-11-21 22:17:59,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9220 conditions, 1613 events. 877/1613 cut-off events. For 36545/36563 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7696 event pairs, 68 based on Foata normal form. 90/1702 useless extension candidates. Maximal degree in co-relation 9174. Up to 312 conditions per place. [2023-11-21 22:17:59,518 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 88 selfloop transitions, 47 changer transitions 80/218 dead transitions. [2023-11-21 22:17:59,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 218 transitions, 2806 flow [2023-11-21 22:17:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 22:17:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-21 22:17:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 334 transitions. [2023-11-21 22:17:59,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2023-11-21 22:17:59,521 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 334 transitions. [2023-11-21 22:17:59,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 334 transitions. [2023-11-21 22:17:59,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:17:59,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 334 transitions. [2023-11-21 22:17:59,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 12.37037037037037) internal successors, (334), 27 states have internal predecessors, (334), 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) [2023-11-21 22:17:59,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 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) [2023-11-21 22:17:59,526 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 24.0) internal successors, (672), 28 states have internal predecessors, (672), 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) [2023-11-21 22:17:59,526 INFO L175 Difference]: Start difference. First operand has 93 places, 54 transitions, 604 flow. Second operand 27 states and 334 transitions. [2023-11-21 22:17:59,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 218 transitions, 2806 flow [2023-11-21 22:17:59,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 218 transitions, 2262 flow, removed 261 selfloop flow, removed 12 redundant places. [2023-11-21 22:17:59,600 INFO L231 Difference]: Finished difference. Result has 119 places, 70 transitions, 1007 flow [2023-11-21 22:17:59,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1007, PETRI_PLACES=119, PETRI_TRANSITIONS=70} [2023-11-21 22:17:59,603 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2023-11-21 22:17:59,603 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 70 transitions, 1007 flow [2023-11-21 22:17:59,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 13 states have internal predecessors, (92), 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) [2023-11-21 22:17:59,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:17:59,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:17:59,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:17:59,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:59,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:17:59,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:17:59,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2054289116, now seen corresponding path program 1 times [2023-11-21 22:17:59,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:17:59,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232074595] [2023-11-21 22:17:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:59,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:17:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:17:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:17:59,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:17:59,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232074595] [2023-11-21 22:17:59,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232074595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:17:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870508418] [2023-11-21 22:17:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:17:59,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:17:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:17:59,995 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:00,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:18:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:00,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:18:00,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:00,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870508418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:00,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-21 22:18:00,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962805759] [2023-11-21 22:18:00,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:18:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:18:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:18:00,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:00,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 70 transitions, 1007 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 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) [2023-11-21 22:18:00,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:00,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:00,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:01,343 INFO L124 PetriNetUnfolderBase]: 1111/2082 cut-off events. [2023-11-21 22:18:01,343 INFO L125 PetriNetUnfolderBase]: For 86450/86456 co-relation queries the response was YES. [2023-11-21 22:18:01,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14592 conditions, 2082 events. 1111/2082 cut-off events. For 86450/86456 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10756 event pairs, 153 based on Foata normal form. 69/2148 useless extension candidates. Maximal degree in co-relation 14534. Up to 490 conditions per place. [2023-11-21 22:18:01,381 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 99 selfloop transitions, 51 changer transitions 67/220 dead transitions. [2023-11-21 22:18:01,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 220 transitions, 3619 flow [2023-11-21 22:18:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-21 22:18:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-21 22:18:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2023-11-21 22:18:01,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-21 22:18:01,384 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 309 transitions. [2023-11-21 22:18:01,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 309 transitions. [2023-11-21 22:18:01,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:01,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 309 transitions. [2023-11-21 22:18:01,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 12.36) internal successors, (309), 25 states have internal predecessors, (309), 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) [2023-11-21 22:18:01,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 24.0) internal successors, (624), 26 states have internal predecessors, (624), 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) [2023-11-21 22:18:01,388 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 24.0) internal successors, (624), 26 states have internal predecessors, (624), 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) [2023-11-21 22:18:01,388 INFO L175 Difference]: Start difference. First operand has 119 places, 70 transitions, 1007 flow. Second operand 25 states and 309 transitions. [2023-11-21 22:18:01,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 220 transitions, 3619 flow [2023-11-21 22:18:01,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 3039 flow, removed 274 selfloop flow, removed 15 redundant places. [2023-11-21 22:18:01,556 INFO L231 Difference]: Finished difference. Result has 135 places, 81 transitions, 1293 flow [2023-11-21 22:18:01,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1293, PETRI_PLACES=135, PETRI_TRANSITIONS=81} [2023-11-21 22:18:01,557 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2023-11-21 22:18:01,557 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 81 transitions, 1293 flow [2023-11-21 22:18:01,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 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) [2023-11-21 22:18:01,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:01,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:01,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:01,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:01,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:01,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1106441918, now seen corresponding path program 2 times [2023-11-21 22:18:01,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:01,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849611903] [2023-11-21 22:18:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849611903] [2023-11-21 22:18:01,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849611903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699601316] [2023-11-21 22:18:01,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:01,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:01,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:01,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:18:02,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:18:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:02,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:18:02,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:02,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699601316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:02,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:02,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-21 22:18:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268531492] [2023-11-21 22:18:02,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:02,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:18:02,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:18:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:18:02,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:02,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 81 transitions, 1293 flow. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 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) [2023-11-21 22:18:02,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:02,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:02,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:03,409 INFO L124 PetriNetUnfolderBase]: 1228/2335 cut-off events. [2023-11-21 22:18:03,409 INFO L125 PetriNetUnfolderBase]: For 138013/138019 co-relation queries the response was YES. [2023-11-21 22:18:03,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17618 conditions, 2335 events. 1228/2335 cut-off events. For 138013/138019 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12360 event pairs, 38 based on Foata normal form. 141/2475 useless extension candidates. Maximal degree in co-relation 17553. Up to 498 conditions per place. [2023-11-21 22:18:03,508 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 92 selfloop transitions, 78 changer transitions 102/275 dead transitions. [2023-11-21 22:18:03,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 275 transitions, 5195 flow [2023-11-21 22:18:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-21 22:18:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-21 22:18:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 369 transitions. [2023-11-21 22:18:03,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2023-11-21 22:18:03,512 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 369 transitions. [2023-11-21 22:18:03,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 369 transitions. [2023-11-21 22:18:03,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:03,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 369 transitions. [2023-11-21 22:18:03,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 12.3) internal successors, (369), 30 states have internal predecessors, (369), 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) [2023-11-21 22:18:03,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 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) [2023-11-21 22:18:03,516 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 24.0) internal successors, (744), 31 states have internal predecessors, (744), 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) [2023-11-21 22:18:03,516 INFO L175 Difference]: Start difference. First operand has 135 places, 81 transitions, 1293 flow. Second operand 30 states and 369 transitions. [2023-11-21 22:18:03,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 275 transitions, 5195 flow [2023-11-21 22:18:03,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 275 transitions, 4432 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-11-21 22:18:03,908 INFO L231 Difference]: Finished difference. Result has 158 places, 102 transitions, 1932 flow [2023-11-21 22:18:03,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1932, PETRI_PLACES=158, PETRI_TRANSITIONS=102} [2023-11-21 22:18:03,909 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2023-11-21 22:18:03,910 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 102 transitions, 1932 flow [2023-11-21 22:18:03,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 states have internal predecessors, (107), 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) [2023-11-21 22:18:03,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:03,910 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:03,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:04,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:18:04,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:04,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1874164450, now seen corresponding path program 3 times [2023-11-21 22:18:04,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:04,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133981723] [2023-11-21 22:18:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:04,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:04,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133981723] [2023-11-21 22:18:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133981723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:04,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901751576] [2023-11-21 22:18:04,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:18:04,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:04,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:04,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:04,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:18:04,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-21 22:18:04,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:04,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:18:04,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:04,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:04,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901751576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:04,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-11-21 22:18:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946349962] [2023-11-21 22:18:04,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 22:18:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 22:18:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:18:04,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:04,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 102 transitions, 1932 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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) [2023-11-21 22:18:04,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:04,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:04,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:06,903 INFO L124 PetriNetUnfolderBase]: 1696/3129 cut-off events. [2023-11-21 22:18:06,903 INFO L125 PetriNetUnfolderBase]: For 259056/259062 co-relation queries the response was YES. [2023-11-21 22:18:06,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27310 conditions, 3129 events. 1696/3129 cut-off events. For 259056/259062 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 15641 event pairs, 42 based on Foata normal form. 96/3224 useless extension candidates. Maximal degree in co-relation 27235. Up to 675 conditions per place. [2023-11-21 22:18:06,959 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 142 selfloop transitions, 112 changer transitions 135/392 dead transitions. [2023-11-21 22:18:06,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 392 transitions, 8378 flow [2023-11-21 22:18:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-21 22:18:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-21 22:18:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 565 transitions. [2023-11-21 22:18:06,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117753623188406 [2023-11-21 22:18:06,962 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 565 transitions. [2023-11-21 22:18:06,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 565 transitions. [2023-11-21 22:18:06,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:06,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 565 transitions. [2023-11-21 22:18:06,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 12.282608695652174) internal successors, (565), 46 states have internal predecessors, (565), 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) [2023-11-21 22:18:06,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 24.0) internal successors, (1128), 47 states have internal predecessors, (1128), 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) [2023-11-21 22:18:06,968 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 24.0) internal successors, (1128), 47 states have internal predecessors, (1128), 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) [2023-11-21 22:18:06,968 INFO L175 Difference]: Start difference. First operand has 158 places, 102 transitions, 1932 flow. Second operand 46 states and 565 transitions. [2023-11-21 22:18:06,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 392 transitions, 8378 flow [2023-11-21 22:18:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 392 transitions, 7066 flow, removed 626 selfloop flow, removed 20 redundant places. [2023-11-21 22:18:07,362 INFO L231 Difference]: Finished difference. Result has 203 places, 136 transitions, 3026 flow [2023-11-21 22:18:07,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3026, PETRI_PLACES=203, PETRI_TRANSITIONS=136} [2023-11-21 22:18:07,363 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 177 predicate places. [2023-11-21 22:18:07,363 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 136 transitions, 3026 flow [2023-11-21 22:18:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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) [2023-11-21 22:18:07,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:07,364 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:07,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-21 22:18:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-21 22:18:07,579 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:07,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash -267224371, now seen corresponding path program 4 times [2023-11-21 22:18:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:07,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102629611] [2023-11-21 22:18:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102629611] [2023-11-21 22:18:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102629611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278457322] [2023-11-21 22:18:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:18:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:08,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:08,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:18:08,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:18:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:08,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 22:18:08,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:08,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278457322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:08,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:08,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2023-11-21 22:18:08,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819507347] [2023-11-21 22:18:08,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:18:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:18:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:18:08,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:08,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 136 transitions, 3026 flow. Second operand has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 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) [2023-11-21 22:18:08,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:08,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:08,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:10,901 INFO L124 PetriNetUnfolderBase]: 1948/3747 cut-off events. [2023-11-21 22:18:10,901 INFO L125 PetriNetUnfolderBase]: For 472418/472424 co-relation queries the response was YES. [2023-11-21 22:18:10,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37233 conditions, 3747 events. 1948/3747 cut-off events. For 472418/472424 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 19860 event pairs, 421 based on Foata normal form. 87/3831 useless extension candidates. Maximal degree in co-relation 37141. Up to 1483 conditions per place. [2023-11-21 22:18:10,964 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 163 selfloop transitions, 87 changer transitions 115/368 dead transitions. [2023-11-21 22:18:10,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 368 transitions, 9920 flow [2023-11-21 22:18:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-21 22:18:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-21 22:18:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 450 transitions. [2023-11-21 22:18:10,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-11-21 22:18:10,967 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 450 transitions. [2023-11-21 22:18:10,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 450 transitions. [2023-11-21 22:18:10,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:10,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 450 transitions. [2023-11-21 22:18:10,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 11.842105263157896) internal successors, (450), 38 states have internal predecessors, (450), 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) [2023-11-21 22:18:10,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 24.0) internal successors, (936), 39 states have internal predecessors, (936), 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) [2023-11-21 22:18:10,971 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 24.0) internal successors, (936), 39 states have internal predecessors, (936), 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) [2023-11-21 22:18:10,971 INFO L175 Difference]: Start difference. First operand has 203 places, 136 transitions, 3026 flow. Second operand 38 states and 450 transitions. [2023-11-21 22:18:10,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 368 transitions, 9920 flow [2023-11-21 22:18:11,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 368 transitions, 7111 flow, removed 1365 selfloop flow, removed 29 redundant places. [2023-11-21 22:18:11,884 INFO L231 Difference]: Finished difference. Result has 220 places, 166 transitions, 3251 flow [2023-11-21 22:18:11,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3251, PETRI_PLACES=220, PETRI_TRANSITIONS=166} [2023-11-21 22:18:11,885 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 194 predicate places. [2023-11-21 22:18:11,885 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 166 transitions, 3251 flow [2023-11-21 22:18:11,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 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) [2023-11-21 22:18:11,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:11,886 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:11,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:12,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:18:12,099 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:12,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:12,099 INFO L85 PathProgramCache]: Analyzing trace with hash 144353231, now seen corresponding path program 5 times [2023-11-21 22:18:12,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:12,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909526334] [2023-11-21 22:18:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:12,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909526334] [2023-11-21 22:18:12,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909526334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:12,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092901378] [2023-11-21 22:18:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:18:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:12,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:12,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:18:12,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-21 22:18:12,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:12,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 22:18:12,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:12,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:13,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092901378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:13,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:13,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-11-21 22:18:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428330595] [2023-11-21 22:18:13,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 22:18:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 22:18:13,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:18:13,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:13,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 166 transitions, 3251 flow. Second operand has 31 states, 31 states have (on average 7.193548387096774) internal successors, (223), 31 states have internal predecessors, (223), 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) [2023-11-21 22:18:13,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:13,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:13,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:16,164 INFO L124 PetriNetUnfolderBase]: 2461/4916 cut-off events. [2023-11-21 22:18:16,165 INFO L125 PetriNetUnfolderBase]: For 552218/552224 co-relation queries the response was YES. [2023-11-21 22:18:16,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44428 conditions, 4916 events. 2461/4916 cut-off events. For 552218/552224 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28401 event pairs, 194 based on Foata normal form. 87/5002 useless extension candidates. Maximal degree in co-relation 44335. Up to 1170 conditions per place. [2023-11-21 22:18:16,255 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 156 selfloop transitions, 175 changer transitions 129/463 dead transitions. [2023-11-21 22:18:16,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 463 transitions, 10748 flow [2023-11-21 22:18:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-21 22:18:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-21 22:18:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 538 transitions. [2023-11-21 22:18:16,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981481481481482 [2023-11-21 22:18:16,266 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 538 transitions. [2023-11-21 22:18:16,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 538 transitions. [2023-11-21 22:18:16,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:16,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 538 transitions. [2023-11-21 22:18:16,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 11.955555555555556) internal successors, (538), 45 states have internal predecessors, (538), 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) [2023-11-21 22:18:16,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 24.0) internal successors, (1104), 46 states have internal predecessors, (1104), 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) [2023-11-21 22:18:16,278 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 24.0) internal successors, (1104), 46 states have internal predecessors, (1104), 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) [2023-11-21 22:18:16,278 INFO L175 Difference]: Start difference. First operand has 220 places, 166 transitions, 3251 flow. Second operand 45 states and 538 transitions. [2023-11-21 22:18:16,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 463 transitions, 10748 flow [2023-11-21 22:18:17,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 463 transitions, 9595 flow, removed 545 selfloop flow, removed 22 redundant places. [2023-11-21 22:18:17,598 INFO L231 Difference]: Finished difference. Result has 253 places, 223 transitions, 4889 flow [2023-11-21 22:18:17,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4889, PETRI_PLACES=253, PETRI_TRANSITIONS=223} [2023-11-21 22:18:17,599 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 227 predicate places. [2023-11-21 22:18:17,600 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 223 transitions, 4889 flow [2023-11-21 22:18:17,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.193548387096774) internal successors, (223), 31 states have internal predecessors, (223), 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) [2023-11-21 22:18:17,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:17,602 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:17,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:17,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:18:17,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -363771433, now seen corresponding path program 6 times [2023-11-21 22:18:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739996214] [2023-11-21 22:18:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:18,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739996214] [2023-11-21 22:18:18,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739996214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:18,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416780379] [2023-11-21 22:18:18,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:18:18,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:18,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:18,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:18,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:18:18,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-21 22:18:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:18,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 22:18:18,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:18,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:18,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416780379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:18,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-11-21 22:18:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170743041] [2023-11-21 22:18:18,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 22:18:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 22:18:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-21 22:18:18,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:18,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 223 transitions, 4889 flow. Second operand has 31 states, 31 states have (on average 7.096774193548387) internal successors, (220), 31 states have internal predecessors, (220), 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) [2023-11-21 22:18:18,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:18,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:18,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:22,061 INFO L124 PetriNetUnfolderBase]: 3100/6127 cut-off events. [2023-11-21 22:18:22,061 INFO L125 PetriNetUnfolderBase]: For 912630/912636 co-relation queries the response was YES. [2023-11-21 22:18:22,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62565 conditions, 6127 events. 3100/6127 cut-off events. For 912630/912636 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 35875 event pairs, 47 based on Foata normal form. 87/6211 useless extension candidates. Maximal degree in co-relation 62462. Up to 1464 conditions per place. [2023-11-21 22:18:22,241 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 184 selfloop transitions, 228 changer transitions 121/536 dead transitions. [2023-11-21 22:18:22,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 536 transitions, 14007 flow [2023-11-21 22:18:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-21 22:18:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-21 22:18:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 602 transitions. [2023-11-21 22:18:22,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2023-11-21 22:18:22,245 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 602 transitions. [2023-11-21 22:18:22,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 602 transitions. [2023-11-21 22:18:22,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:22,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 602 transitions. [2023-11-21 22:18:22,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 12.285714285714286) internal successors, (602), 49 states have internal predecessors, (602), 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) [2023-11-21 22:18:22,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 24.0) internal successors, (1200), 50 states have internal predecessors, (1200), 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) [2023-11-21 22:18:22,251 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 24.0) internal successors, (1200), 50 states have internal predecessors, (1200), 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) [2023-11-21 22:18:22,251 INFO L175 Difference]: Start difference. First operand has 253 places, 223 transitions, 4889 flow. Second operand 49 states and 602 transitions. [2023-11-21 22:18:22,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 536 transitions, 14007 flow [2023-11-21 22:18:24,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 536 transitions, 12182 flow, removed 868 selfloop flow, removed 23 redundant places. [2023-11-21 22:18:24,308 INFO L231 Difference]: Finished difference. Result has 291 places, 259 transitions, 6141 flow [2023-11-21 22:18:24,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6141, PETRI_PLACES=291, PETRI_TRANSITIONS=259} [2023-11-21 22:18:24,310 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 265 predicate places. [2023-11-21 22:18:24,310 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 259 transitions, 6141 flow [2023-11-21 22:18:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.096774193548387) internal successors, (220), 31 states have internal predecessors, (220), 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) [2023-11-21 22:18:24,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:24,311 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:24,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:24,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:18:24,511 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:24,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1486093648, now seen corresponding path program 7 times [2023-11-21 22:18:24,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:24,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968360050] [2023-11-21 22:18:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:25,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:25,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968360050] [2023-11-21 22:18:25,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968360050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:25,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798717353] [2023-11-21 22:18:25,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:18:25,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:25,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:25,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:18:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:25,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-21 22:18:25,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:25,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:25,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798717353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:25,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:25,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 27 [2023-11-21 22:18:25,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601407265] [2023-11-21 22:18:25,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:25,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-21 22:18:25,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:25,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-21 22:18:25,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:18:25,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:25,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 259 transitions, 6141 flow. Second operand has 28 states, 28 states have (on average 7.142857142857143) internal successors, (200), 28 states have internal predecessors, (200), 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) [2023-11-21 22:18:25,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:25,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:25,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:29,224 INFO L124 PetriNetUnfolderBase]: 3109/6168 cut-off events. [2023-11-21 22:18:29,225 INFO L125 PetriNetUnfolderBase]: For 1134463/1134469 co-relation queries the response was YES. [2023-11-21 22:18:29,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66568 conditions, 6168 events. 3109/6168 cut-off events. For 1134463/1134469 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 36236 event pairs, 38 based on Foata normal form. 123/6290 useless extension candidates. Maximal degree in co-relation 66451. Up to 1458 conditions per place. [2023-11-21 22:18:29,409 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 176 selfloop transitions, 245 changer transitions 139/563 dead transitions. [2023-11-21 22:18:29,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 563 transitions, 15413 flow [2023-11-21 22:18:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-21 22:18:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-21 22:18:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 633 transitions. [2023-11-21 22:18:29,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2023-11-21 22:18:29,415 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 633 transitions. [2023-11-21 22:18:29,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 633 transitions. [2023-11-21 22:18:29,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:18:29,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 633 transitions. [2023-11-21 22:18:29,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 12.173076923076923) internal successors, (633), 52 states have internal predecessors, (633), 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) [2023-11-21 22:18:29,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 24.0) internal successors, (1272), 53 states have internal predecessors, (1272), 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) [2023-11-21 22:18:29,423 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 24.0) internal successors, (1272), 53 states have internal predecessors, (1272), 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) [2023-11-21 22:18:29,424 INFO L175 Difference]: Start difference. First operand has 291 places, 259 transitions, 6141 flow. Second operand 52 states and 633 transitions. [2023-11-21 22:18:29,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 563 transitions, 15413 flow [2023-11-21 22:18:33,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 563 transitions, 13435 flow, removed 896 selfloop flow, removed 28 redundant places. [2023-11-21 22:18:33,956 INFO L231 Difference]: Finished difference. Result has 322 places, 272 transitions, 6638 flow [2023-11-21 22:18:33,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5093, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=6638, PETRI_PLACES=322, PETRI_TRANSITIONS=272} [2023-11-21 22:18:33,957 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 296 predicate places. [2023-11-21 22:18:33,958 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 272 transitions, 6638 flow [2023-11-21 22:18:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.142857142857143) internal successors, (200), 28 states have internal predecessors, (200), 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) [2023-11-21 22:18:33,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:18:33,958 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:18:33,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:18:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:18:34,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-21 22:18:34,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:18:34,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1504312340, now seen corresponding path program 8 times [2023-11-21 22:18:34,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:18:34,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556040604] [2023-11-21 22:18:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:18:34,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:18:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:18:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:34,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:18:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556040604] [2023-11-21 22:18:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556040604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:18:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200390502] [2023-11-21 22:18:34,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:18:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:18:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:18:34,811 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:18:34,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbf8f618-a7c1-409f-b3d5-98b1973cd1bf/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:18:34,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:18:34,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:18:34,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 22:18:34,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:18:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:35,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:18:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:18:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200390502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:18:35,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:18:35,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-21 22:18:35,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018380208] [2023-11-21 22:18:35,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:18:35,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-21 22:18:35,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:18:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-21 22:18:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1769, Unknown=0, NotChecked=0, Total=2256 [2023-11-21 22:18:35,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-21 22:18:35,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 272 transitions, 6638 flow. Second operand has 48 states, 48 states have (on average 7.020833333333333) internal successors, (337), 48 states have internal predecessors, (337), 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) [2023-11-21 22:18:35,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:18:35,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-21 22:18:35,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:18:40,163 INFO L124 PetriNetUnfolderBase]: 3406/6727 cut-off events. [2023-11-21 22:18:40,163 INFO L125 PetriNetUnfolderBase]: For 1325254/1325260 co-relation queries the response was YES.