./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --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_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya --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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:22:59,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:22:59,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:22:59,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:22:59,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:22:59,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:22:59,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:22:59,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:22:59,275 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:22:59,276 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:22:59,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:22:59,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:22:59,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:22:59,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:22:59,279 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:22:59,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:22:59,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:22:59,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:22:59,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:22:59,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:22:59,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:22:59,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:22:59,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:22:59,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:22:59,284 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:22:59,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:22:59,284 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:22:59,285 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:22:59,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:22:59,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:22:59,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:22:59,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:22:59,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:22:59,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:22:59,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:22:59,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:22:59,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:22:59,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:22:59,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:22:59,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:22:59,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:22:59,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:22:59,289 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_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2023-11-29 06:22:59,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:22:59,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:22:59,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:22:59,521 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:22:59,521 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:22:59,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-29 06:23:02,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:23:02,430 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:23:02,431 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2023-11-29 06:23:02,439 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/data/7ab89eb0a/ac8f1cdd1845415081972fc28b1e9858/FLAG157c1fece [2023-11-29 06:23:02,452 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/data/7ab89eb0a/ac8f1cdd1845415081972fc28b1e9858 [2023-11-29 06:23:02,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:23:02,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:23:02,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:23:02,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:23:02,462 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:23:02,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5dcdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02, skipping insertion in model container [2023-11-29 06:23:02,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,488 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:23:02,646 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_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2023-11-29 06:23:02,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:23:02,667 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:23:02,692 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_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2862,2875] [2023-11-29 06:23:02,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:23:02,705 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:23:02,706 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:23:02,712 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:23:02,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02 WrapperNode [2023-11-29 06:23:02,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:23:02,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:23:02,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:23:02,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:23:02,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,759 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 240 [2023-11-29 06:23:02,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:23:02,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:23:02,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:23:02,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:23:02,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,797 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [2, 2, 16, 2, 2]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 4, 1, 1]. [2023-11-29 06:23:02,798 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,816 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,819 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:23:02,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:23:02,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:23:02,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:23:02,829 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:23:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:02,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:23:02,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:23:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:23:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:23:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:23:02,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:23:02,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:23:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:23:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:23:02,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:23:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:23:02,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:23:02,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:23:02,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:23:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:23:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:23:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:23:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:23:02,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:23:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:23:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:23:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:23:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:23:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:23:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:23:02,925 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:23:03,063 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:23:03,065 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:23:03,452 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:23:03,816 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:23:03,817 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-29 06:23:03,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:03 BoogieIcfgContainer [2023-11-29 06:23:03,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:23:03,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:23:03,820 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:23:03,823 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:23:03,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:23:02" (1/3) ... [2023-11-29 06:23:03,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57608b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:23:03, skipping insertion in model container [2023-11-29 06:23:03,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (2/3) ... [2023-11-29 06:23:03,825 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57608b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:23:03, skipping insertion in model container [2023-11-29 06:23:03,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:03" (3/3) ... [2023-11-29 06:23:03,826 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2023-11-29 06:23:03,835 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:23:03,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:23:03,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:23:03,846 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:23:03,903 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 06:23:03,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 41 transitions, 103 flow [2023-11-29 06:23:03,969 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2023-11-29 06:23:03,969 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:23:03,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 7/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-29 06:23:03,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 41 transitions, 103 flow [2023-11-29 06:23:03,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 92 flow [2023-11-29 06:23:03,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:23:03,992 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;@47a37f9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:23:03,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 06:23:04,007 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:23:04,007 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-29 06:23:04,008 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:23:04,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:04,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:04,009 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:04,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:04,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2092303507, now seen corresponding path program 1 times [2023-11-29 06:23:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:04,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104533323] [2023-11-29 06:23:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:04,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104533323] [2023-11-29 06:23:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104533323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:04,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:04,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:23:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326839036] [2023-11-29 06:23:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:04,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:23:04,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:23:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:23:04,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-29 06:23:04,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:04,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-29 06:23:04,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:04,726 INFO L124 PetriNetUnfolderBase]: 406/689 cut-off events. [2023-11-29 06:23:04,726 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-29 06:23:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 689 events. 406/689 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2827 event pairs, 265 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 993. Up to 557 conditions per place. [2023-11-29 06:23:04,737 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 29 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-11-29 06:23:04,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2023-11-29 06:23:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:23:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:23:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-29 06:23:04,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2023-11-29 06:23:04,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-29 06:23:04,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-29 06:23:04,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:04,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-29 06:23:04,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,762 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 92 flow. Second operand 3 states and 62 transitions. [2023-11-29 06:23:04,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2023-11-29 06:23:04,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:23:04,770 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 92 flow [2023-11-29 06:23:04,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-11-29 06:23:04,776 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2023-11-29 06:23:04,776 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 92 flow [2023-11-29 06:23:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:04,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:04,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:23:04,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:04,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:04,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2133776376, now seen corresponding path program 1 times [2023-11-29 06:23:04,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:04,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886947884] [2023-11-29 06:23:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:04,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:04,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886947884] [2023-11-29 06:23:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886947884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:23:04,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138952590] [2023-11-29 06:23:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:04,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:04,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:04,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:04,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:23:04,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-29 06:23:04,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:04,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-29 06:23:04,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:05,139 INFO L124 PetriNetUnfolderBase]: 406/691 cut-off events. [2023-11-29 06:23:05,139 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-29 06:23:05,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1275 conditions, 691 events. 406/691 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2830 event pairs, 265 based on Foata normal form. 0/611 useless extension candidates. Maximal degree in co-relation 1264. Up to 556 conditions per place. [2023-11-29 06:23:05,146 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 27 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2023-11-29 06:23:05,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 162 flow [2023-11-29 06:23:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2023-11-29 06:23:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2023-11-29 06:23:05,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 75 transitions. [2023-11-29 06:23:05,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 75 transitions. [2023-11-29 06:23:05,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:05,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 75 transitions. [2023-11-29 06:23:05,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,151 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,151 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 92 flow. Second operand 4 states and 75 transitions. [2023-11-29 06:23:05,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 162 flow [2023-11-29 06:23:05,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 158 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:05,153 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 116 flow [2023-11-29 06:23:05,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-11-29 06:23:05,154 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-29 06:23:05,155 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 116 flow [2023-11-29 06:23:05,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:05,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:05,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:23:05,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:05,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 571813758, now seen corresponding path program 1 times [2023-11-29 06:23:05,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:05,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047751352] [2023-11-29 06:23:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:23:05,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:05,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047751352] [2023-11-29 06:23:05,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047751352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:05,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:05,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:23:05,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532492352] [2023-11-29 06:23:05,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:05,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:23:05,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:05,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:23:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:23:05,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-29 06:23:05,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:05,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-29 06:23:05,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:05,541 INFO L124 PetriNetUnfolderBase]: 584/1064 cut-off events. [2023-11-29 06:23:05,541 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-29 06:23:05,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 1064 events. 584/1064 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4922 event pairs, 191 based on Foata normal form. 1/937 useless extension candidates. Maximal degree in co-relation 1850. Up to 398 conditions per place. [2023-11-29 06:23:05,550 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 44 selfloop transitions, 2 changer transitions 2/55 dead transitions. [2023-11-29 06:23:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 245 flow [2023-11-29 06:23:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:23:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:23:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2023-11-29 06:23:05,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2023-11-29 06:23:05,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 76 transitions. [2023-11-29 06:23:05,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 76 transitions. [2023-11-29 06:23:05,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:05,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 76 transitions. [2023-11-29 06:23:05,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 41.0) internal successors, (164), 4 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,555 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 116 flow. Second operand 3 states and 76 transitions. [2023-11-29 06:23:05,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 245 flow [2023-11-29 06:23:05,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:05,557 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 127 flow [2023-11-29 06:23:05,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-29 06:23:05,559 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-29 06:23:05,559 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 127 flow [2023-11-29 06:23:05,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:05,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:05,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:23:05,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:05,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -486309193, now seen corresponding path program 1 times [2023-11-29 06:23:05,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:05,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133100273] [2023-11-29 06:23:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:23:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:05,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133100273] [2023-11-29 06:23:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133100273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546753817] [2023-11-29 06:23:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:05,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:05,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:23:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:23:05,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:23:06,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:23:06,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546753817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:06,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:06,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 06:23:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045193658] [2023-11-29 06:23:06,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:23:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:23:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:23:06,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2023-11-29 06:23:06,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 127 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:06,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2023-11-29 06:23:06,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:06,629 INFO L124 PetriNetUnfolderBase]: 997/1625 cut-off events. [2023-11-29 06:23:06,629 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-29 06:23:06,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3191 conditions, 1625 events. 997/1625 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7161 event pairs, 444 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 2347. Up to 765 conditions per place. [2023-11-29 06:23:06,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 40 selfloop transitions, 10 changer transitions 41/97 dead transitions. [2023-11-29 06:23:06,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 462 flow [2023-11-29 06:23:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:23:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:23:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2023-11-29 06:23:06,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2023-11-29 06:23:06,641 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 172 transitions. [2023-11-29 06:23:06,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 172 transitions. [2023-11-29 06:23:06,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:06,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 172 transitions. [2023-11-29 06:23:06,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,645 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,645 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 127 flow. Second operand 9 states and 172 transitions. [2023-11-29 06:23:06,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 462 flow [2023-11-29 06:23:06,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:06,650 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 177 flow [2023-11-29 06:23:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-29 06:23:06,651 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2023-11-29 06:23:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 177 flow [2023-11-29 06:23:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:06,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:06,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:23:06,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:06,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:06,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -363157052, now seen corresponding path program 2 times [2023-11-29 06:23:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:06,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709325611] [2023-11-29 06:23:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:06,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:23:07,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:07,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709325611] [2023-11-29 06:23:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709325611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:07,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971248034] [2023-11-29 06:23:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:07,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:07,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:07,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:23:07,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:23:07,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:07,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:23:07,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:23:07,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:23:07,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971248034] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:07,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:23:07,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-29 06:23:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317267544] [2023-11-29 06:23:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:07,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:23:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:23:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:23:07,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2023-11-29 06:23:07,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:07,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2023-11-29 06:23:07,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:07,608 INFO L124 PetriNetUnfolderBase]: 728/1293 cut-off events. [2023-11-29 06:23:07,608 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-11-29 06:23:07,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1293 events. 728/1293 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6277 event pairs, 299 based on Foata normal form. 0/1156 useless extension candidates. Maximal degree in co-relation 2569. Up to 771 conditions per place. [2023-11-29 06:23:07,619 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-11-29 06:23:07,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 321 flow [2023-11-29 06:23:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:23:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:23:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2023-11-29 06:23:07,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2023-11-29 06:23:07,621 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2023-11-29 06:23:07,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2023-11-29 06:23:07,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:07,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2023-11-29 06:23:07,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 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) [2023-11-29 06:23:07,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,623 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,624 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 177 flow. Second operand 6 states and 107 transitions. [2023-11-29 06:23:07,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 321 flow [2023-11-29 06:23:07,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 301 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-29 06:23:07,630 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 177 flow [2023-11-29 06:23:07,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-29 06:23:07,631 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2023-11-29 06:23:07,631 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 177 flow [2023-11-29 06:23:07,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:07,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:07,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:23:07,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:07,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:07,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1231162789, now seen corresponding path program 1 times [2023-11-29 06:23:07,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:07,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230133392] [2023-11-29 06:23:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:07,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:23:08,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230133392] [2023-11-29 06:23:08,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230133392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785596845] [2023-11-29 06:23:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:08,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:08,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:08,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:23:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:08,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:23:08,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:23:08,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:23:08,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785596845] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:08,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:23:08,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-11-29 06:23:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236200944] [2023-11-29 06:23:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:08,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:23:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:23:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:23:08,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2023-11-29 06:23:08,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:08,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:08,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2023-11-29 06:23:08,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:08,686 INFO L124 PetriNetUnfolderBase]: 1060/1806 cut-off events. [2023-11-29 06:23:08,686 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2023-11-29 06:23:08,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 1806 events. 1060/1806 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8800 event pairs, 355 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 3946. Up to 752 conditions per place. [2023-11-29 06:23:08,703 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 48 selfloop transitions, 6 changer transitions 0/60 dead transitions. [2023-11-29 06:23:08,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 333 flow [2023-11-29 06:23:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:23:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:23:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2023-11-29 06:23:08,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2023-11-29 06:23:08,705 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 101 transitions. [2023-11-29 06:23:08,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 101 transitions. [2023-11-29 06:23:08,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:08,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 101 transitions. [2023-11-29 06:23:08,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:08,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:08,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:08,708 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 177 flow. Second operand 6 states and 101 transitions. [2023-11-29 06:23:08,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 333 flow [2023-11-29 06:23:08,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 319 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 06:23:08,715 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 192 flow [2023-11-29 06:23:08,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-29 06:23:08,717 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-11-29 06:23:08,717 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 192 flow [2023-11-29 06:23:08,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:08,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:08,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:08,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:23:08,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:08,921 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:08,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:08,921 INFO L85 PathProgramCache]: Analyzing trace with hash -926828371, now seen corresponding path program 1 times [2023-11-29 06:23:08,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:08,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844916864] [2023-11-29 06:23:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:08,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 06:23:09,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844916864] [2023-11-29 06:23:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844916864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:09,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:23:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563104207] [2023-11-29 06:23:09,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:23:09,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:23:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:23:09,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2023-11-29 06:23:09,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:09,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2023-11-29 06:23:09,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:09,602 INFO L124 PetriNetUnfolderBase]: 1234/1922 cut-off events. [2023-11-29 06:23:09,602 INFO L125 PetriNetUnfolderBase]: For 831/831 co-relation queries the response was YES. [2023-11-29 06:23:09,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4708 conditions, 1922 events. 1234/1922 cut-off events. For 831/831 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7808 event pairs, 261 based on Foata normal form. 52/1869 useless extension candidates. Maximal degree in co-relation 4672. Up to 1356 conditions per place. [2023-11-29 06:23:09,621 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 77 selfloop transitions, 8 changer transitions 1/91 dead transitions. [2023-11-29 06:23:09,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 500 flow [2023-11-29 06:23:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:23:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:23:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-29 06:23:09,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2023-11-29 06:23:09,622 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-29 06:23:09,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-29 06:23:09,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:09,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-29 06:23:09,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 41.0) internal successors, (287), 7 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,625 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 192 flow. Second operand 6 states and 118 transitions. [2023-11-29 06:23:09,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 500 flow [2023-11-29 06:23:09,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 91 transitions, 489 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:23:09,631 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 242 flow [2023-11-29 06:23:09,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-29 06:23:09,632 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2023-11-29 06:23:09,632 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 242 flow [2023-11-29 06:23:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:09,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:09,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:23:09,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 06:23:09,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:09,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1822430167, now seen corresponding path program 2 times [2023-11-29 06:23:09,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:09,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480246143] [2023-11-29 06:23:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:09,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:23:12,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480246143] [2023-11-29 06:23:12,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480246143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:12,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893622775] [2023-11-29 06:23:12,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:12,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:12,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:12,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:12,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a78d5-b2d6-4f39-b85a-bd0dd8661c58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:23:12,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:23:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:12,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:23:12,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:13,880 INFO L349 Elim1Store]: treesize reduction 92, result has 46.8 percent of original size [2023-11-29 06:23:13,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 131