./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI --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 0.2.4-dev-0e0057c [2023-11-24 21:53:37,672 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:53:37,785 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:53:37,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:53:37,792 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:53:37,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:53:37,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:53:37,821 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:53:37,822 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:53:37,823 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:53:37,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:53:37,824 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:53:37,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:53:37,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:53:37,826 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:53:37,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:53:37,828 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:53:37,829 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:53:37,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:53:37,830 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:53:37,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:53:37,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:53:37,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:53:37,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:53:37,834 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:53:37,834 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:53:37,835 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:53:37,836 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:53:37,836 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:53:37,837 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:53:37,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:53:37,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:53:37,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:53:37,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:53:37,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:53:37,840 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:53:37,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:53:37,840 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:53:37,841 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:53:37,841 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:53:37,841 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:53:37,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:53:37,842 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_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2023-11-24 21:53:38,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:53:38,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:53:38,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:53:38,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:53:38,272 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:53:38,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2023-11-24 21:53:41,871 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:53:42,321 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:53:42,322 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/sv-benchmarks/c/pthread/triangular-longer-1.i [2023-11-24 21:53:42,348 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/data/63a78c308/2ad9eb0ee31b46bb889d7d47c14dfdab/FLAGb42ec8ee4 [2023-11-24 21:53:42,372 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/data/63a78c308/2ad9eb0ee31b46bb889d7d47c14dfdab [2023-11-24 21:53:42,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:53:42,384 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:53:42,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:53:42,390 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:53:42,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:53:42,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:53:42" (1/1) ... [2023-11-24 21:53:42,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a821b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:42, skipping insertion in model container [2023-11-24 21:53:42,400 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:53:42" (1/1) ... [2023-11-24 21:53:42,478 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:53:42,909 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_97f08a52-559b-4a85-8492-4063e943ba0e/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2023-11-24 21:53:42,915 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:53:42,928 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:53:42,981 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_97f08a52-559b-4a85-8492-4063e943ba0e/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2023-11-24 21:53:42,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:53:43,033 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:53:43,033 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:53:43,042 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:53:43,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43 WrapperNode [2023-11-24 21:53:43,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:53:43,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:53:43,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:53:43,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:53:43,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,127 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2023-11-24 21:53:43,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:53:43,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:53:43,129 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:53:43,129 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:53:43,144 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,154 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,190 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-24 21:53:43,190 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:53:43,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:53:43,236 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:53:43,236 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:53:43,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (1/1) ... [2023-11-24 21:53:43,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:53:43,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:43,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:53:43,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:53:43,339 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-24 21:53:43,339 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-24 21:53:43,339 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-24 21:53:43,339 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-24 21:53:43,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:53:43,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:53:43,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:53:43,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:53:43,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:53:43,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:53:43,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:53:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:53:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:53:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:53:43,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:53:43,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:53:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:53:43,347 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:53:43,589 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:53:43,592 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:53:43,777 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:53:43,924 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:53:43,924 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:53:43,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:53:43 BoogieIcfgContainer [2023-11-24 21:53:43,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:53:43,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:53:43,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:53:43,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:53:43,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:53:42" (1/3) ... [2023-11-24 21:53:43,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df64ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:53:43, skipping insertion in model container [2023-11-24 21:53:43,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:43" (2/3) ... [2023-11-24 21:53:43,936 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df64ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:53:43, skipping insertion in model container [2023-11-24 21:53:43,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:53:43" (3/3) ... [2023-11-24 21:53:43,938 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-11-24 21:53:43,950 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:53:43,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:53:43,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:53:43,965 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:53:44,027 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:53:44,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2023-11-24 21:53:44,111 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-11-24 21:53:44,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:53:44,115 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. [2023-11-24 21:53:44,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2023-11-24 21:53:44,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2023-11-24 21:53:44,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:53:44,145 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;@79aa14f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:53:44,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 21:53:44,159 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:53:44,160 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2023-11-24 21:53:44,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:53:44,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:44,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:44,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:44,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:44,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1796875976, now seen corresponding path program 1 times [2023-11-24 21:53:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:44,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458202730] [2023-11-24 21:53:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:44,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458202730] [2023-11-24 21:53:45,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458202730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:45,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:45,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:53:45,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066638106] [2023-11-24 21:53:45,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:53:45,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:45,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:53:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:53:45,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:45,157 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) [2023-11-24 21:53:45,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:45,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:45,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:45,555 INFO L124 PetriNetUnfolderBase]: 321/543 cut-off events. [2023-11-24 21:53:45,556 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:53:45,560 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. [2023-11-24 21:53:45,566 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2023-11-24 21:53:45,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2023-11-24 21:53:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:53:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:53:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2023-11-24 21:53:45,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-24 21:53:45,585 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 84 transitions. [2023-11-24 21:53:45,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 84 transitions. [2023-11-24 21:53:45,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:45,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 84 transitions. [2023-11-24 21:53:45,593 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) [2023-11-24 21:53:45,602 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) [2023-11-24 21:53:45,602 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) [2023-11-24 21:53:45,605 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2023-11-24 21:53:45,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2023-11-24 21:53:45,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:53:45,622 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2023-11-24 21:53:45,625 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} [2023-11-24 21:53:45,634 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-11-24 21:53:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2023-11-24 21:53:45,635 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) [2023-11-24 21:53:45,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:45,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:45,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:53:45,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:45,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 676521124, now seen corresponding path program 1 times [2023-11-24 21:53:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:45,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105560560] [2023-11-24 21:53:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:45,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105560560] [2023-11-24 21:53:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105560560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:46,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:53:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984522658] [2023-11-24 21:53:46,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:46,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:53:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:53:46,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:53:46,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:46,062 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) [2023-11-24 21:53:46,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:46,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:46,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:46,493 INFO L124 PetriNetUnfolderBase]: 382/689 cut-off events. [2023-11-24 21:53:46,493 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2023-11-24 21:53:46,497 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. [2023-11-24 21:53:46,504 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2023-11-24 21:53:46,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2023-11-24 21:53:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:53:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-24 21:53:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2023-11-24 21:53:46,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-24 21:53:46,508 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 117 transitions. [2023-11-24 21:53:46,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 117 transitions. [2023-11-24 21:53:46,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:46,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 117 transitions. [2023-11-24 21:53:46,511 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) [2023-11-24 21:53:46,513 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) [2023-11-24 21:53:46,513 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) [2023-11-24 21:53:46,514 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2023-11-24 21:53:46,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2023-11-24 21:53:46,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-24 21:53:46,523 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2023-11-24 21:53:46,523 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} [2023-11-24 21:53:46,524 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-24 21:53:46,525 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2023-11-24 21:53:46,525 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) [2023-11-24 21:53:46,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:46,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:46,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:53:46,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:46,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1193097064, now seen corresponding path program 2 times [2023-11-24 21:53:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:46,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801774732] [2023-11-24 21:53:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:46,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:46,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801774732] [2023-11-24 21:53:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801774732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:46,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:53:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098518554] [2023-11-24 21:53:46,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:53:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:53:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:53:46,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:46,771 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) [2023-11-24 21:53:46,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:46,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:46,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:47,071 INFO L124 PetriNetUnfolderBase]: 328/605 cut-off events. [2023-11-24 21:53:47,071 INFO L125 PetriNetUnfolderBase]: For 1004/1016 co-relation queries the response was YES. [2023-11-24 21:53:47,074 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. [2023-11-24 21:53:47,078 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 38 selfloop transitions, 9 changer transitions 28/78 dead transitions. [2023-11-24 21:53:47,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 78 transitions, 496 flow [2023-11-24 21:53:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:53:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-24 21:53:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2023-11-24 21:53:47,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2023-11-24 21:53:47,081 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 103 transitions. [2023-11-24 21:53:47,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 103 transitions. [2023-11-24 21:53:47,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:47,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 103 transitions. [2023-11-24 21:53:47,083 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) [2023-11-24 21:53:47,085 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) [2023-11-24 21:53:47,085 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) [2023-11-24 21:53:47,086 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 8 states and 103 transitions. [2023-11-24 21:53:47,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 78 transitions, 496 flow [2023-11-24 21:53:47,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 78 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-24 21:53:47,095 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 210 flow [2023-11-24 21:53:47,096 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} [2023-11-24 21:53:47,097 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2023-11-24 21:53:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 210 flow [2023-11-24 21:53:47,098 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) [2023-11-24 21:53:47,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:47,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:47,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:53:47,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:47,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash -330137667, now seen corresponding path program 1 times [2023-11-24 21:53:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422600881] [2023-11-24 21:53:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:47,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422600881] [2023-11-24 21:53:47,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422600881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:47,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:47,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:53:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611484250] [2023-11-24 21:53:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:47,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:53:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:47,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:53:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:53:47,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:47,351 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) [2023-11-24 21:53:47,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:47,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:47,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:47,748 INFO L124 PetriNetUnfolderBase]: 337/617 cut-off events. [2023-11-24 21:53:47,748 INFO L125 PetriNetUnfolderBase]: For 1706/1718 co-relation queries the response was YES. [2023-11-24 21:53:47,751 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. [2023-11-24 21:53:47,756 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 16 changer transitions 24/89 dead transitions. [2023-11-24 21:53:47,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 607 flow [2023-11-24 21:53:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:53:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:53:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2023-11-24 21:53:47,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2023-11-24 21:53:47,762 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 135 transitions. [2023-11-24 21:53:47,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 135 transitions. [2023-11-24 21:53:47,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:47,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 135 transitions. [2023-11-24 21:53:47,766 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) [2023-11-24 21:53:47,768 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) [2023-11-24 21:53:47,769 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) [2023-11-24 21:53:47,769 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 210 flow. Second operand 11 states and 135 transitions. [2023-11-24 21:53:47,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 607 flow [2023-11-24 21:53:47,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 89 transitions, 540 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-11-24 21:53:47,787 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 279 flow [2023-11-24 21:53:47,787 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} [2023-11-24 21:53:47,790 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-11-24 21:53:47,791 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 279 flow [2023-11-24 21:53:47,791 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) [2023-11-24 21:53:47,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:47,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:47,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:53:47,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:47,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2091272465, now seen corresponding path program 2 times [2023-11-24 21:53:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:47,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134454352] [2023-11-24 21:53:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:47,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:47,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134454352] [2023-11-24 21:53:47,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134454352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:47,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:47,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:53:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245352779] [2023-11-24 21:53:47,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:47,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:53:47,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:53:47,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:53:48,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:48,026 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) [2023-11-24 21:53:48,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:48,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:48,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:48,472 INFO L124 PetriNetUnfolderBase]: 508/929 cut-off events. [2023-11-24 21:53:48,473 INFO L125 PetriNetUnfolderBase]: For 3228/3246 co-relation queries the response was YES. [2023-11-24 21:53:48,478 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. [2023-11-24 21:53:48,488 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 57 selfloop transitions, 20 changer transitions 23/103 dead transitions. [2023-11-24 21:53:48,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 771 flow [2023-11-24 21:53:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:53:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:53:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2023-11-24 21:53:48,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2023-11-24 21:53:48,493 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 141 transitions. [2023-11-24 21:53:48,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 141 transitions. [2023-11-24 21:53:48,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:48,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 141 transitions. [2023-11-24 21:53:48,495 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) [2023-11-24 21:53:48,498 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) [2023-11-24 21:53:48,498 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) [2023-11-24 21:53:48,499 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 279 flow. Second operand 11 states and 141 transitions. [2023-11-24 21:53:48,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 771 flow [2023-11-24 21:53:48,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 705 flow, removed 27 selfloop flow, removed 4 redundant places. [2023-11-24 21:53:48,520 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 376 flow [2023-11-24 21:53:48,521 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} [2023-11-24 21:53:48,525 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2023-11-24 21:53:48,526 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 376 flow [2023-11-24 21:53:48,526 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) [2023-11-24 21:53:48,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:48,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:48,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:53:48,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:48,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1387768189, now seen corresponding path program 3 times [2023-11-24 21:53:48,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:48,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399333845] [2023-11-24 21:53:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:48,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:48,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:48,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399333845] [2023-11-24 21:53:48,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399333845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:48,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:48,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:53:48,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612565303] [2023-11-24 21:53:48,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:48,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:53:48,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:48,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:53:48,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:53:48,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:48,765 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) [2023-11-24 21:53:48,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:48,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:48,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:49,204 INFO L124 PetriNetUnfolderBase]: 481/884 cut-off events. [2023-11-24 21:53:49,205 INFO L125 PetriNetUnfolderBase]: For 5148/5166 co-relation queries the response was YES. [2023-11-24 21:53:49,211 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. [2023-11-24 21:53:49,218 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 45 selfloop transitions, 25 changer transitions 33/106 dead transitions. [2023-11-24 21:53:49,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 106 transitions, 964 flow [2023-11-24 21:53:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:53:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-24 21:53:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2023-11-24 21:53:49,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-24 21:53:49,223 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 138 transitions. [2023-11-24 21:53:49,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 138 transitions. [2023-11-24 21:53:49,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:49,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 138 transitions. [2023-11-24 21:53:49,225 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) [2023-11-24 21:53:49,227 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) [2023-11-24 21:53:49,227 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) [2023-11-24 21:53:49,228 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 376 flow. Second operand 11 states and 138 transitions. [2023-11-24 21:53:49,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 106 transitions, 964 flow [2023-11-24 21:53:49,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 893 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-11-24 21:53:49,262 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 475 flow [2023-11-24 21:53:49,263 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} [2023-11-24 21:53:49,268 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2023-11-24 21:53:49,268 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 475 flow [2023-11-24 21:53:49,270 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) [2023-11-24 21:53:49,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:49,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:49,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:53:49,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:49,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:49,273 INFO L85 PathProgramCache]: Analyzing trace with hash 118051405, now seen corresponding path program 1 times [2023-11-24 21:53:49,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:49,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697345647] [2023-11-24 21:53:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:49,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697345647] [2023-11-24 21:53:49,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697345647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:53:49,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965494359] [2023-11-24 21:53:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:49,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:49,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:49,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:53:49,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:53:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:49,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:53:49,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:53:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:49,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:53:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:50,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965494359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:53:50,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:53:50,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-24 21:53:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873351979] [2023-11-24 21:53:50,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:53:50,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:53:50,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:53:50,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:53:50,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:50,116 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) [2023-11-24 21:53:50,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:50,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:50,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:50,872 INFO L124 PetriNetUnfolderBase]: 589/1094 cut-off events. [2023-11-24 21:53:50,872 INFO L125 PetriNetUnfolderBase]: For 10448/10466 co-relation queries the response was YES. [2023-11-24 21:53:50,879 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. [2023-11-24 21:53:50,887 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 67 selfloop transitions, 17 changer transitions 67/154 dead transitions. [2023-11-24 21:53:50,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 154 transitions, 1547 flow [2023-11-24 21:53:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:53:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-24 21:53:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 231 transitions. [2023-11-24 21:53:50,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-11-24 21:53:50,893 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 231 transitions. [2023-11-24 21:53:50,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 231 transitions. [2023-11-24 21:53:50,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:50,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 231 transitions. [2023-11-24 21:53:50,896 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) [2023-11-24 21:53:50,898 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) [2023-11-24 21:53:50,898 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) [2023-11-24 21:53:50,899 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 475 flow. Second operand 19 states and 231 transitions. [2023-11-24 21:53:50,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 154 transitions, 1547 flow [2023-11-24 21:53:50,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1448 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-24 21:53:50,926 INFO L231 Difference]: Finished difference. Result has 93 places, 54 transitions, 604 flow [2023-11-24 21:53:50,926 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} [2023-11-24 21:53:50,927 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-11-24 21:53:50,927 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 54 transitions, 604 flow [2023-11-24 21:53:50,928 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) [2023-11-24 21:53:50,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:50,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:50,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:53:51,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:51,136 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:51,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash 220173143, now seen corresponding path program 2 times [2023-11-24 21:53:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:51,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239184798] [2023-11-24 21:53:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:51,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:51,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:51,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239184798] [2023-11-24 21:53:51,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239184798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:53:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055366109] [2023-11-24 21:53:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:53:51,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:51,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:51,398 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:53:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:53:51,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:53:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:53:51,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:53:51,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:53:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:51,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:53:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055366109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:53:51,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:53:51,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-24 21:53:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095725738] [2023-11-24 21:53:51,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:53:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 21:53:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 21:53:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:53:51,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:51,758 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) [2023-11-24 21:53:51,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:51,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:51,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:52,841 INFO L124 PetriNetUnfolderBase]: 877/1613 cut-off events. [2023-11-24 21:53:52,842 INFO L125 PetriNetUnfolderBase]: For 36545/36563 co-relation queries the response was YES. [2023-11-24 21:53:52,856 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. [2023-11-24 21:53:52,873 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 88 selfloop transitions, 47 changer transitions 80/218 dead transitions. [2023-11-24 21:53:52,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 218 transitions, 2806 flow [2023-11-24 21:53:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-24 21:53:52,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-24 21:53:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 334 transitions. [2023-11-24 21:53:52,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2023-11-24 21:53:52,878 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 334 transitions. [2023-11-24 21:53:52,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 334 transitions. [2023-11-24 21:53:52,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:52,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 334 transitions. [2023-11-24 21:53:52,881 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) [2023-11-24 21:53:52,883 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) [2023-11-24 21:53:52,884 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) [2023-11-24 21:53:52,884 INFO L175 Difference]: Start difference. First operand has 93 places, 54 transitions, 604 flow. Second operand 27 states and 334 transitions. [2023-11-24 21:53:52,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 218 transitions, 2806 flow [2023-11-24 21:53:52,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 218 transitions, 2262 flow, removed 261 selfloop flow, removed 12 redundant places. [2023-11-24 21:53:52,947 INFO L231 Difference]: Finished difference. Result has 119 places, 70 transitions, 1007 flow [2023-11-24 21:53:52,947 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} [2023-11-24 21:53:52,948 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 93 predicate places. [2023-11-24 21:53:52,949 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 70 transitions, 1007 flow [2023-11-24 21:53:52,949 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) [2023-11-24 21:53:52,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:52,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:52,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:53:53,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:53,157 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:53,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2054289116, now seen corresponding path program 1 times [2023-11-24 21:53:53,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:53,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514569987] [2023-11-24 21:53:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:53,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:53,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:53,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514569987] [2023-11-24 21:53:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514569987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:53:53,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255768210] [2023-11-24 21:53:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:53,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:53,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:53:53,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:53:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:53,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:53:53,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:53:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:53,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:53:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255768210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:53:53,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:53:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-24 21:53:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531066765] [2023-11-24 21:53:53,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:53:53,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:53:53,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:53:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:53:53,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:53,919 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) [2023-11-24 21:53:53,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:53,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:53,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:55,108 INFO L124 PetriNetUnfolderBase]: 1111/2082 cut-off events. [2023-11-24 21:53:55,108 INFO L125 PetriNetUnfolderBase]: For 86450/86456 co-relation queries the response was YES. [2023-11-24 21:53:55,131 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. [2023-11-24 21:53:55,157 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 99 selfloop transitions, 51 changer transitions 67/220 dead transitions. [2023-11-24 21:53:55,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 220 transitions, 3619 flow [2023-11-24 21:53:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 21:53:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-24 21:53:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 309 transitions. [2023-11-24 21:53:55,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-24 21:53:55,162 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 309 transitions. [2023-11-24 21:53:55,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 309 transitions. [2023-11-24 21:53:55,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:55,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 309 transitions. [2023-11-24 21:53:55,167 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) [2023-11-24 21:53:55,169 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) [2023-11-24 21:53:55,170 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) [2023-11-24 21:53:55,170 INFO L175 Difference]: Start difference. First operand has 119 places, 70 transitions, 1007 flow. Second operand 25 states and 309 transitions. [2023-11-24 21:53:55,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 220 transitions, 3619 flow [2023-11-24 21:53:55,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 3039 flow, removed 274 selfloop flow, removed 15 redundant places. [2023-11-24 21:53:55,317 INFO L231 Difference]: Finished difference. Result has 135 places, 81 transitions, 1293 flow [2023-11-24 21:53:55,318 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} [2023-11-24 21:53:55,320 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2023-11-24 21:53:55,320 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 81 transitions, 1293 flow [2023-11-24 21:53:55,321 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) [2023-11-24 21:53:55,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:55,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:55,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:53:55,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:55,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:55,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1106441918, now seen corresponding path program 2 times [2023-11-24 21:53:55,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:55,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2267747] [2023-11-24 21:53:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:55,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:55,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2267747] [2023-11-24 21:53:55,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2267747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:53:55,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354654617] [2023-11-24 21:53:55,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:53:55,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:55,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:53:55,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:53:55,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:53:55,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:53:55,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:53:55,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:53:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:55,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:53:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:56,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354654617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:53:56,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:53:56,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-24 21:53:56,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854481433] [2023-11-24 21:53:56,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:53:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:53:56,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:53:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:53:56,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:56,199 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) [2023-11-24 21:53:56,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:56,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:56,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:53:57,580 INFO L124 PetriNetUnfolderBase]: 1228/2335 cut-off events. [2023-11-24 21:53:57,581 INFO L125 PetriNetUnfolderBase]: For 138013/138019 co-relation queries the response was YES. [2023-11-24 21:53:57,608 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. [2023-11-24 21:53:57,644 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 92 selfloop transitions, 78 changer transitions 102/275 dead transitions. [2023-11-24 21:53:57,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 275 transitions, 5195 flow [2023-11-24 21:53:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-24 21:53:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-24 21:53:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 369 transitions. [2023-11-24 21:53:57,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2023-11-24 21:53:57,651 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 369 transitions. [2023-11-24 21:53:57,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 369 transitions. [2023-11-24 21:53:57,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:53:57,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 369 transitions. [2023-11-24 21:53:57,657 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) [2023-11-24 21:53:57,660 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) [2023-11-24 21:53:57,661 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) [2023-11-24 21:53:57,661 INFO L175 Difference]: Start difference. First operand has 135 places, 81 transitions, 1293 flow. Second operand 30 states and 369 transitions. [2023-11-24 21:53:57,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 275 transitions, 5195 flow [2023-11-24 21:53:58,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 275 transitions, 4432 flow, removed 348 selfloop flow, removed 18 redundant places. [2023-11-24 21:53:58,011 INFO L231 Difference]: Finished difference. Result has 158 places, 102 transitions, 1932 flow [2023-11-24 21:53:58,012 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} [2023-11-24 21:53:58,013 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2023-11-24 21:53:58,013 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 102 transitions, 1932 flow [2023-11-24 21:53:58,013 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) [2023-11-24 21:53:58,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:53:58,014 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:58,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:53:58,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:58,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:53:58,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1874164450, now seen corresponding path program 3 times [2023-11-24 21:53:58,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:58,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326515706] [2023-11-24 21:53:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:58,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:58,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326515706] [2023-11-24 21:53:58,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326515706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:53:58,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902374812] [2023-11-24 21:53:58,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:53:58,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:58,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:53:58,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:53:58,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:53:58,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:53:58,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:53:58,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:53:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:58,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:53:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:59,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902374812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:53:59,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:53:59,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-11-24 21:53:59,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391100093] [2023-11-24 21:53:59,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:53:59,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:53:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:53:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:53:59,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:53:59,147 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) [2023-11-24 21:53:59,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:53:59,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:53:59,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:01,830 INFO L124 PetriNetUnfolderBase]: 1696/3129 cut-off events. [2023-11-24 21:54:01,830 INFO L125 PetriNetUnfolderBase]: For 259056/259062 co-relation queries the response was YES. [2023-11-24 21:54:01,877 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. [2023-11-24 21:54:01,921 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 142 selfloop transitions, 112 changer transitions 135/392 dead transitions. [2023-11-24 21:54:01,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 392 transitions, 8378 flow [2023-11-24 21:54:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-24 21:54:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-24 21:54:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 565 transitions. [2023-11-24 21:54:01,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117753623188406 [2023-11-24 21:54:01,929 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 565 transitions. [2023-11-24 21:54:01,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 565 transitions. [2023-11-24 21:54:01,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:01,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 565 transitions. [2023-11-24 21:54:01,932 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) [2023-11-24 21:54:01,936 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) [2023-11-24 21:54:01,937 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) [2023-11-24 21:54:01,938 INFO L175 Difference]: Start difference. First operand has 158 places, 102 transitions, 1932 flow. Second operand 46 states and 565 transitions. [2023-11-24 21:54:01,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 392 transitions, 8378 flow [2023-11-24 21:54:02,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 392 transitions, 7066 flow, removed 626 selfloop flow, removed 20 redundant places. [2023-11-24 21:54:02,309 INFO L231 Difference]: Finished difference. Result has 203 places, 136 transitions, 3026 flow [2023-11-24 21:54:02,310 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} [2023-11-24 21:54:02,311 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 177 predicate places. [2023-11-24 21:54:02,311 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 136 transitions, 3026 flow [2023-11-24 21:54:02,312 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) [2023-11-24 21:54:02,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:02,312 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:02,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:54:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:02,519 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:54:02,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash -267224371, now seen corresponding path program 4 times [2023-11-24 21:54:02,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:02,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997512623] [2023-11-24 21:54:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:03,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997512623] [2023-11-24 21:54:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997512623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992249482] [2023-11-24 21:54:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:54:03,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:03,167 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:03,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:54:03,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:54:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:54:03,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:54:03,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:03,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:04,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992249482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:54:04,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:54:04,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2023-11-24 21:54:04,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065331774] [2023-11-24 21:54:04,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:54:04,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 21:54:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 21:54:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:54:04,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:54:04,051 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) [2023-11-24 21:54:04,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:04,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:54:04,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:06,970 INFO L124 PetriNetUnfolderBase]: 1948/3747 cut-off events. [2023-11-24 21:54:06,970 INFO L125 PetriNetUnfolderBase]: For 472418/472424 co-relation queries the response was YES. [2023-11-24 21:54:07,033 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. [2023-11-24 21:54:07,072 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 163 selfloop transitions, 87 changer transitions 115/368 dead transitions. [2023-11-24 21:54:07,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 368 transitions, 9920 flow [2023-11-24 21:54:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-24 21:54:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-24 21:54:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 450 transitions. [2023-11-24 21:54:07,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-11-24 21:54:07,076 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 450 transitions. [2023-11-24 21:54:07,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 450 transitions. [2023-11-24 21:54:07,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:07,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 450 transitions. [2023-11-24 21:54:07,079 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) [2023-11-24 21:54:07,082 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) [2023-11-24 21:54:07,085 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) [2023-11-24 21:54:07,086 INFO L175 Difference]: Start difference. First operand has 203 places, 136 transitions, 3026 flow. Second operand 38 states and 450 transitions. [2023-11-24 21:54:07,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 368 transitions, 9920 flow [2023-11-24 21:54:07,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 368 transitions, 7111 flow, removed 1365 selfloop flow, removed 29 redundant places. [2023-11-24 21:54:07,853 INFO L231 Difference]: Finished difference. Result has 220 places, 166 transitions, 3251 flow [2023-11-24 21:54:07,854 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} [2023-11-24 21:54:07,855 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 194 predicate places. [2023-11-24 21:54:07,855 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 166 transitions, 3251 flow [2023-11-24 21:54:07,855 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) [2023-11-24 21:54:07,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:07,856 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:07,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 21:54:08,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:54:08,063 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:54:08,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash 144353231, now seen corresponding path program 5 times [2023-11-24 21:54:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:08,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881285063] [2023-11-24 21:54:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:08,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:08,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:08,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881285063] [2023-11-24 21:54:08,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881285063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165272757] [2023-11-24 21:54:08,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:54:08,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:08,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:08,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:08,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:54:08,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-24 21:54:08,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:54:08,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:54:08,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:08,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165272757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:54:09,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:54:09,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-11-24 21:54:09,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379256273] [2023-11-24 21:54:09,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:54:09,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:54:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:54:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:54:09,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:54:09,656 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) [2023-11-24 21:54:09,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:09,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:54:09,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:12,975 INFO L124 PetriNetUnfolderBase]: 2461/4916 cut-off events. [2023-11-24 21:54:12,975 INFO L125 PetriNetUnfolderBase]: For 552218/552224 co-relation queries the response was YES. [2023-11-24 21:54:13,056 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. [2023-11-24 21:54:13,102 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 156 selfloop transitions, 175 changer transitions 129/463 dead transitions. [2023-11-24 21:54:13,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 463 transitions, 10748 flow [2023-11-24 21:54:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-24 21:54:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-24 21:54:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 538 transitions. [2023-11-24 21:54:13,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981481481481482 [2023-11-24 21:54:13,115 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 538 transitions. [2023-11-24 21:54:13,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 538 transitions. [2023-11-24 21:54:13,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:13,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 538 transitions. [2023-11-24 21:54:13,122 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) [2023-11-24 21:54:13,127 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) [2023-11-24 21:54:13,128 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) [2023-11-24 21:54:13,128 INFO L175 Difference]: Start difference. First operand has 220 places, 166 transitions, 3251 flow. Second operand 45 states and 538 transitions. [2023-11-24 21:54:13,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 463 transitions, 10748 flow [2023-11-24 21:54:14,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 463 transitions, 9595 flow, removed 545 selfloop flow, removed 22 redundant places. [2023-11-24 21:54:14,141 INFO L231 Difference]: Finished difference. Result has 253 places, 223 transitions, 4889 flow [2023-11-24 21:54:14,142 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} [2023-11-24 21:54:14,143 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 227 predicate places. [2023-11-24 21:54:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 223 transitions, 4889 flow [2023-11-24 21:54:14,144 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) [2023-11-24 21:54:14,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:14,144 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:14,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:54:14,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:14,350 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:54:14,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash -363771433, now seen corresponding path program 6 times [2023-11-24 21:54:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:14,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180666846] [2023-11-24 21:54:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180666846] [2023-11-24 21:54:14,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180666846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165969594] [2023-11-24 21:54:14,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:54:14,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:14,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:14,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:54:14,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-24 21:54:14,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:54:14,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:54:14,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:15,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165969594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:54:15,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:54:15,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2023-11-24 21:54:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94881249] [2023-11-24 21:54:15,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:54:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:54:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:54:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:54:15,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:54:15,691 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) [2023-11-24 21:54:15,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:15,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:54:15,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:54:19,106 INFO L124 PetriNetUnfolderBase]: 3100/6127 cut-off events. [2023-11-24 21:54:19,107 INFO L125 PetriNetUnfolderBase]: For 912630/912636 co-relation queries the response was YES. [2023-11-24 21:54:19,175 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. [2023-11-24 21:54:19,228 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 184 selfloop transitions, 228 changer transitions 121/536 dead transitions. [2023-11-24 21:54:19,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 536 transitions, 14007 flow [2023-11-24 21:54:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-24 21:54:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-24 21:54:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 602 transitions. [2023-11-24 21:54:19,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2023-11-24 21:54:19,233 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 602 transitions. [2023-11-24 21:54:19,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 602 transitions. [2023-11-24 21:54:19,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:54:19,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 602 transitions. [2023-11-24 21:54:19,236 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) [2023-11-24 21:54:19,239 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) [2023-11-24 21:54:19,240 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) [2023-11-24 21:54:19,240 INFO L175 Difference]: Start difference. First operand has 253 places, 223 transitions, 4889 flow. Second operand 49 states and 602 transitions. [2023-11-24 21:54:19,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 536 transitions, 14007 flow [2023-11-24 21:54:20,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 536 transitions, 12182 flow, removed 868 selfloop flow, removed 23 redundant places. [2023-11-24 21:54:20,696 INFO L231 Difference]: Finished difference. Result has 291 places, 259 transitions, 6141 flow [2023-11-24 21:54:20,697 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} [2023-11-24 21:54:20,697 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 265 predicate places. [2023-11-24 21:54:20,697 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 259 transitions, 6141 flow [2023-11-24 21:54:20,698 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) [2023-11-24 21:54:20,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:54:20,698 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:20,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:54:20,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:20,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:54:20,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1486093648, now seen corresponding path program 7 times [2023-11-24 21:54:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:20,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503639380] [2023-11-24 21:54:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:21,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503639380] [2023-11-24 21:54:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503639380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695185728] [2023-11-24 21:54:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:54:21,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:21,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:21,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:21,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f08a52-559b-4a85-8492-4063e943ba0e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:54:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:21,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:54:21,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:21,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:54:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695185728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:54:21,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:54:21,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 27 [2023-11-24 21:54:21,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370496888] [2023-11-24 21:54:21,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:54:21,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-24 21:54:21,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:21,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-24 21:54:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-11-24 21:54:21,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2023-11-24 21:54:21,933 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) [2023-11-24 21:54:21,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:54:21,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2023-11-24 21:54:21,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand