./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.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_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/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_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/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_375e7527-c1b8-4244-8b16-57e5a32b16d1/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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:25:21,491 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:25:21,582 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:25:21,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:25:21,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:25:21,628 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:25:21,628 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:25:21,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:25:21,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:25:21,630 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:25:21,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:25:21,632 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:25:21,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:25:21,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:25:21,633 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:25:21,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:25:21,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:25:21,635 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:25:21,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:25:21,636 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:25:21,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:25:21,637 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:25:21,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:25:21,638 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:25:21,639 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:25:21,639 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:25:21,640 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:25:21,640 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:25:21,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:25:21,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:25:21,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:25:21,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:25:21,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:25:21,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:25:21,643 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:25:21,643 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:25:21,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:25:21,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:25:21,644 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:25:21,644 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:25:21,644 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:25:21,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:25:21,645 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_375e7527-c1b8-4244-8b16-57e5a32b16d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-29 04:25:21,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:25:21,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:25:21,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:25:21,926 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:25:21,927 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:25:21,928 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-29 04:25:24,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:25:25,073 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:25:25,074 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-29 04:25:25,083 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/data/1ba6c329a/8b2a98aaf94f45ecadd7c559a055f4f4/FLAGb2c9b6101 [2023-11-29 04:25:25,100 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/data/1ba6c329a/8b2a98aaf94f45ecadd7c559a055f4f4 [2023-11-29 04:25:25,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:25:25,105 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:25:25,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:25:25,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:25:25,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:25:25,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,116 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c876a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25, skipping insertion in model container [2023-11-29 04:25:25,116 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,148 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:25:25,356 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_375e7527-c1b8-4244-8b16-57e5a32b16d1/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-29 04:25:25,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:25:25,379 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:25:25,402 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_375e7527-c1b8-4244-8b16-57e5a32b16d1/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-29 04:25:25,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:25:25,415 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:25:25,415 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 04:25:25,423 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:25:25,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25 WrapperNode [2023-11-29 04:25:25,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:25:25,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:25:25,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:25:25,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:25:25,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,442 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,470 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2023-11-29 04:25:25,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:25:25,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:25:25,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:25:25,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:25:25,486 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,490 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,510 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 04:25:25,511 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,511 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,535 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:25:25,536 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:25:25,536 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:25:25,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:25:25,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (1/1) ... [2023-11-29 04:25:25,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:25:25,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:25,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:25:25,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:25:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:25:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 04:25:25,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 04:25:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 04:25:25,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 04:25:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:25:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:25:25,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:25:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:25:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:25:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:25:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:25:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:25:25,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:25:25,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 04:25:25,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 04:25:25,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:25:25,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:25:25,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:25:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:25:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:25:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:25:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:25:25,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:25:25,627 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 04:25:25,769 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:25:25,771 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:25:26,035 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:25:26,247 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:25:26,247 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:25:26,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:25:26 BoogieIcfgContainer [2023-11-29 04:25:26,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:25:26,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:25:26,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:25:26,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:25:26,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:25:25" (1/3) ... [2023-11-29 04:25:26,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d34f4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:25:26, skipping insertion in model container [2023-11-29 04:25:26,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:25:25" (2/3) ... [2023-11-29 04:25:26,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d34f4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:25:26, skipping insertion in model container [2023-11-29 04:25:26,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:25:26" (3/3) ... [2023-11-29 04:25:26,260 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-29 04:25:26,271 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:25:26,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:25:26,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:25:26,284 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:25:26,331 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 04:25:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2023-11-29 04:25:26,402 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-29 04:25:26,402 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:25:26,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2023-11-29 04:25:26,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2023-11-29 04:25:26,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2023-11-29 04:25:26,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:25:26,430 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;@3a616a4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:25:26,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 04:25:26,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:25:26,445 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-11-29 04:25:26,445 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:25:26,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:26,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:26,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:26,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:26,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1474316529, now seen corresponding path program 1 times [2023-11-29 04:25:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:26,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519965876] [2023-11-29 04:25:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:26,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:26,711 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 04:25:26,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:26,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519965876] [2023-11-29 04:25:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519965876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:25:26,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:25:26,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:25:26,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405087667] [2023-11-29 04:25:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:25:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:25:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:25:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:25:26,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:26,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 04:25:26,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:26,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:26,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:26,872 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2023-11-29 04:25:26,873 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 04:25:26,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 776 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2023-11-29 04:25:26,879 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-11-29 04:25:26,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2023-11-29 04:25:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:25:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 04:25:26,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2023-11-29 04:25:26,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-29 04:25:26,892 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 35 transitions. [2023-11-29 04:25:26,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 35 transitions. [2023-11-29 04:25:26,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:26,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 35 transitions. [2023-11-29 04:25:26,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 04:25:26,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 04:25:26,901 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 04:25:26,903 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2023-11-29 04:25:26,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2023-11-29 04:25:26,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 04:25:26,909 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2023-11-29 04:25:26,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-29 04:25:26,915 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-11-29 04:25:26,915 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2023-11-29 04:25:26,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 04:25:26,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:26,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:26,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:25:26,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:26,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1351442730, now seen corresponding path program 1 times [2023-11-29 04:25:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:26,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101241945] [2023-11-29 04:25:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:27,081 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 04:25:27,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:27,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101241945] [2023-11-29 04:25:27,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101241945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:25:27,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:25:27,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:25:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472891372] [2023-11-29 04:25:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:25:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:25:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:25:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:25:27,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:27,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 04:25:27,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:27,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:27,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:27,204 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2023-11-29 04:25:27,205 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 04:25:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1240 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2023-11-29 04:25:27,209 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2023-11-29 04:25:27,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2023-11-29 04:25:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:25:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:25:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-29 04:25:27,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2023-11-29 04:25:27,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-29 04:25:27,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-29 04:25:27,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:27,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-29 04:25:27,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states 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 04:25:27,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 04:25:27,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 04:25:27,215 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2023-11-29 04:25:27,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2023-11-29 04:25:27,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 04:25:27,218 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2023-11-29 04:25:27,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-29 04:25:27,219 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-29 04:25:27,220 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2023-11-29 04:25:27,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states 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 04:25:27,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:27,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:27,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:25:27,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:27,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash -959153222, now seen corresponding path program 1 times [2023-11-29 04:25:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:27,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123558399] [2023-11-29 04:25:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:27,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:27,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:27,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123558399] [2023-11-29 04:25:27,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123558399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:25:27,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:25:27,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:25:27,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627031162] [2023-11-29 04:25:27,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:25:27,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:25:27,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:25:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:25:27,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:27,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 04:25:27,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:27,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:27,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:27,455 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2023-11-29 04:25:27,456 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-29 04:25:27,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1567 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2023-11-29 04:25:27,460 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2023-11-29 04:25:27,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2023-11-29 04:25:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:25:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:25:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-29 04:25:27,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-11-29 04:25:27,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-29 04:25:27,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-29 04:25:27,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:27,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-29 04:25:27,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 04:25:27,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 04:25:27,465 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 04:25:27,465 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2023-11-29 04:25:27,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2023-11-29 04:25:27,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:25:27,468 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2023-11-29 04:25:27,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-29 04:25:27,469 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-29 04:25:27,469 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2023-11-29 04:25:27,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 04:25:27,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:27,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:25:27,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:27,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash 171303639, now seen corresponding path program 1 times [2023-11-29 04:25:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:27,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553107617] [2023-11-29 04:25:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:27,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553107617] [2023-11-29 04:25:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553107617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:25:27,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:25:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:25:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619119054] [2023-11-29 04:25:27,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:25:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:25:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:25:27,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:25:27,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:27,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 04:25:27,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:27,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:27,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:27,837 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2023-11-29 04:25:27,837 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-29 04:25:27,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2284 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2023-11-29 04:25:27,841 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2023-11-29 04:25:27,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2023-11-29 04:25:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:25:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:25:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2023-11-29 04:25:27,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2023-11-29 04:25:27,844 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 63 transitions. [2023-11-29 04:25:27,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 63 transitions. [2023-11-29 04:25:27,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:27,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 63 transitions. [2023-11-29 04:25:27,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 04:25:27,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 04:25:27,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 04:25:27,847 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2023-11-29 04:25:27,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2023-11-29 04:25:27,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:25:27,850 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2023-11-29 04:25:27,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-29 04:25:27,851 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-11-29 04:25:27,851 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2023-11-29 04:25:27,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 04:25:27,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:27,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 04:25:27,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:25:27,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:27,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash -832023193, now seen corresponding path program 1 times [2023-11-29 04:25:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:27,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955117734] [2023-11-29 04:25:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:27,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:25:28,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955117734] [2023-11-29 04:25:28,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955117734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130071891] [2023-11-29 04:25:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:28,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:28,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:25:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:28,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 04:25:28,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:28,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:25:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:28,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:28,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-11-29 04:25:28,753 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:25:28,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 41 [2023-11-29 04:25:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130071891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:28,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:28,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2023-11-29 04:25:28,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367193119] [2023-11-29 04:25:28,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:25:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:25:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:25:28,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:28,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 04:25:28,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:28,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:28,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:29,101 INFO L124 PetriNetUnfolderBase]: 232/455 cut-off events. [2023-11-29 04:25:29,102 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-29 04:25:29,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 455 events. 232/455 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2049 event pairs, 45 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 974. Up to 113 conditions per place. [2023-11-29 04:25:29,105 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 38 selfloop transitions, 6 changer transitions 13/62 dead transitions. [2023-11-29 04:25:29,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 283 flow [2023-11-29 04:25:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:25:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:25:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2023-11-29 04:25:29,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2023-11-29 04:25:29,107 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2023-11-29 04:25:29,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2023-11-29 04:25:29,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:29,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2023-11-29 04:25:29,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 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 04:25:29,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 04:25:29,111 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 04:25:29,111 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 7 states and 107 transitions. [2023-11-29 04:25:29,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 283 flow [2023-11-29 04:25:29,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 04:25:29,114 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 102 flow [2023-11-29 04:25:29,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=102, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-11-29 04:25:29,116 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2023-11-29 04:25:29,116 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 102 flow [2023-11-29 04:25:29,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 04:25:29,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:29,117 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:29,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:25:29,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:29,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:29,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1783023759, now seen corresponding path program 2 times [2023-11-29 04:25:29,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928247602] [2023-11-29 04:25:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:25:29,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928247602] [2023-11-29 04:25:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928247602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:29,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959042170] [2023-11-29 04:25:29,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:25:29,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:29,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:29,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:29,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:25:29,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:25:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:29,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:25:29,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:25:29,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 04:25:29,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959042170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:29,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:29,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-11-29 04:25:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291533849] [2023-11-29 04:25:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:25:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:29,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:25:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:25:29,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:29,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 04:25:29,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:29,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:29,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:30,421 INFO L124 PetriNetUnfolderBase]: 657/1294 cut-off events. [2023-11-29 04:25:30,421 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2023-11-29 04:25:30,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1294 events. 657/1294 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7557 event pairs, 234 based on Foata normal form. 38/1094 useless extension candidates. Maximal degree in co-relation 2838. Up to 335 conditions per place. [2023-11-29 04:25:30,429 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 46 selfloop transitions, 9 changer transitions 39/99 dead transitions. [2023-11-29 04:25:30,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 494 flow [2023-11-29 04:25:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:25:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 04:25:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2023-11-29 04:25:30,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938697318007663 [2023-11-29 04:25:30,432 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 155 transitions. [2023-11-29 04:25:30,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 155 transitions. [2023-11-29 04:25:30,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:30,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 155 transitions. [2023-11-29 04:25:30,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 04:25:30,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 04:25:30,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states 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 04:25:30,435 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 102 flow. Second operand 9 states and 155 transitions. [2023-11-29 04:25:30,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 494 flow [2023-11-29 04:25:30,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 99 transitions, 478 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 04:25:30,440 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 174 flow [2023-11-29 04:25:30,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-29 04:25:30,441 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2023-11-29 04:25:30,442 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 174 flow [2023-11-29 04:25:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 04:25:30,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:30,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:30,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:25:30,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:25:30,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:30,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:30,649 INFO L85 PathProgramCache]: Analyzing trace with hash -23646222, now seen corresponding path program 3 times [2023-11-29 04:25:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:30,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166172419] [2023-11-29 04:25:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166172419] [2023-11-29 04:25:31,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166172419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395760872] [2023-11-29 04:25:31,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:25:31,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:31,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:31,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:31,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:25:31,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:25:31,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:31,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 04:25:31,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:31,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:31,797 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:25:31,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 04:25:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:32,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395760872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:32,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:32,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 04:25:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086224078] [2023-11-29 04:25:32,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:32,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 04:25:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 04:25:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:25:32,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:32,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 174 flow. Second operand has 21 states, 21 states have (on average 9.666666666666666) internal successors, (203), 21 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 04:25:32,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:33,373 INFO L124 PetriNetUnfolderBase]: 1279/2484 cut-off events. [2023-11-29 04:25:33,373 INFO L125 PetriNetUnfolderBase]: For 1996/1996 co-relation queries the response was YES. [2023-11-29 04:25:33,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6047 conditions, 2484 events. 1279/2484 cut-off events. For 1996/1996 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 16232 event pairs, 422 based on Foata normal form. 5/2049 useless extension candidates. Maximal degree in co-relation 6034. Up to 586 conditions per place. [2023-11-29 04:25:33,391 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 74 selfloop transitions, 10 changer transitions 58/147 dead transitions. [2023-11-29 04:25:33,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 147 transitions, 881 flow [2023-11-29 04:25:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:25:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 04:25:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2023-11-29 04:25:33,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782493368700266 [2023-11-29 04:25:33,394 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 218 transitions. [2023-11-29 04:25:33,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 218 transitions. [2023-11-29 04:25:33,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:33,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 218 transitions. [2023-11-29 04:25:33,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 16.76923076923077) internal successors, (218), 13 states have internal predecessors, (218), 0 states have call successors, (0), 0 states 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 04:25:33,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 29.0) internal successors, (406), 14 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 04:25:33,398 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 29.0) internal successors, (406), 14 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 04:25:33,398 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 174 flow. Second operand 13 states and 218 transitions. [2023-11-29 04:25:33,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 147 transitions, 881 flow [2023-11-29 04:25:33,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 147 transitions, 851 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-29 04:25:33,410 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 262 flow [2023-11-29 04:25:33,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=262, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-11-29 04:25:33,411 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2023-11-29 04:25:33,411 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 262 flow [2023-11-29 04:25:33,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.666666666666666) internal successors, (203), 21 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 04:25:33,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:33,412 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:33,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:25:33,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:33,613 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:33,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1384883908, now seen corresponding path program 4 times [2023-11-29 04:25:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811934089] [2023-11-29 04:25:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:25:34,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811934089] [2023-11-29 04:25:34,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811934089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470045287] [2023-11-29 04:25:34,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:25:34,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:34,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:34,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:34,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:25:34,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:25:34,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:34,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:25:34,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:25:38,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:38,733 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:25:38,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-29 04:25:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:25:38,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470045287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:38,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:38,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-11-29 04:25:38,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418872294] [2023-11-29 04:25:38,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:25:38,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:25:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2023-11-29 04:25:38,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:38,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 262 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 04:25:38,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:38,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:38,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:40,180 INFO L124 PetriNetUnfolderBase]: 1779/3494 cut-off events. [2023-11-29 04:25:40,180 INFO L125 PetriNetUnfolderBase]: For 7129/7129 co-relation queries the response was YES. [2023-11-29 04:25:40,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9290 conditions, 3494 events. 1779/3494 cut-off events. For 7129/7129 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 24324 event pairs, 144 based on Foata normal form. 24/2894 useless extension candidates. Maximal degree in co-relation 9271. Up to 528 conditions per place. [2023-11-29 04:25:40,200 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 98 selfloop transitions, 28 changer transitions 81/212 dead transitions. [2023-11-29 04:25:40,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 212 transitions, 1359 flow [2023-11-29 04:25:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:25:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 04:25:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 317 transitions. [2023-11-29 04:25:40,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6430020283975659 [2023-11-29 04:25:40,202 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 317 transitions. [2023-11-29 04:25:40,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 317 transitions. [2023-11-29 04:25:40,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:40,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 317 transitions. [2023-11-29 04:25:40,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 18.647058823529413) internal successors, (317), 17 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 04:25:40,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 04:25:40,207 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 04:25:40,207 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 262 flow. Second operand 17 states and 317 transitions. [2023-11-29 04:25:40,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 212 transitions, 1359 flow [2023-11-29 04:25:40,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 212 transitions, 1235 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-11-29 04:25:40,227 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 500 flow [2023-11-29 04:25:40,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=500, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2023-11-29 04:25:40,228 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2023-11-29 04:25:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 500 flow [2023-11-29 04:25:40,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 04:25:40,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:40,229 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:40,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:25:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:40,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:40,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1358877817, now seen corresponding path program 5 times [2023-11-29 04:25:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263263265] [2023-11-29 04:25:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:40,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:41,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:41,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263263265] [2023-11-29 04:25:41,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263263265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138123264] [2023-11-29 04:25:41,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:25:41,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:41,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:41,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:41,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:25:41,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 04:25:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:41,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:25:41,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:25:41,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:41,510 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:25:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-29 04:25:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:25:41,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138123264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:41,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:41,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 19 [2023-11-29 04:25:41,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74135757] [2023-11-29 04:25:41,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:41,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 04:25:41,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 04:25:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:25:41,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:41,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 500 flow. Second operand has 20 states, 20 states have (on average 9.7) internal successors, (194), 20 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 04:25:41,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:41,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:41,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:43,106 INFO L124 PetriNetUnfolderBase]: 1506/2874 cut-off events. [2023-11-29 04:25:43,106 INFO L125 PetriNetUnfolderBase]: For 11784/11784 co-relation queries the response was YES. [2023-11-29 04:25:43,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8788 conditions, 2874 events. 1506/2874 cut-off events. For 11784/11784 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18669 event pairs, 117 based on Foata normal form. 1/2374 useless extension candidates. Maximal degree in co-relation 8763. Up to 432 conditions per place. [2023-11-29 04:25:43,130 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 111 selfloop transitions, 39 changer transitions 80/235 dead transitions. [2023-11-29 04:25:43,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 235 transitions, 1636 flow [2023-11-29 04:25:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:25:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 04:25:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 373 transitions. [2023-11-29 04:25:43,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846394984326019 [2023-11-29 04:25:43,133 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 373 transitions. [2023-11-29 04:25:43,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 373 transitions. [2023-11-29 04:25:43,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:43,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 373 transitions. [2023-11-29 04:25:43,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 16.954545454545453) internal successors, (373), 22 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 04:25:43,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 04:25:43,138 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states 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 04:25:43,138 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 500 flow. Second operand 22 states and 373 transitions. [2023-11-29 04:25:43,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 235 transitions, 1636 flow [2023-11-29 04:25:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 235 transitions, 1416 flow, removed 101 selfloop flow, removed 6 redundant places. [2023-11-29 04:25:43,170 INFO L231 Difference]: Finished difference. Result has 88 places, 61 transitions, 498 flow [2023-11-29 04:25:43,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=498, PETRI_PLACES=88, PETRI_TRANSITIONS=61} [2023-11-29 04:25:43,172 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2023-11-29 04:25:43,172 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 61 transitions, 498 flow [2023-11-29 04:25:43,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.7) internal successors, (194), 20 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 04:25:43,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:43,172 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:43,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:25:43,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:43,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:43,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 67419759, now seen corresponding path program 6 times [2023-11-29 04:25:43,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:43,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682719104] [2023-11-29 04:25:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:43,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:25:43,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682719104] [2023-11-29 04:25:43,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682719104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369992698] [2023-11-29 04:25:43,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:25:43,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:43,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:43,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:25:43,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 04:25:43,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:43,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:25:43,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:25:44,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:25:44,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369992698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:44,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:44,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-29 04:25:44,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122467302] [2023-11-29 04:25:44,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:44,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:25:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:44,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:25:44,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:25:44,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 61 transitions, 498 flow. Second operand has 26 states, 26 states have (on average 9.807692307692308) internal successors, (255), 26 states have internal predecessors, (255), 0 states have call successors, (0), 0 states 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 04:25:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:44,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:45,591 INFO L124 PetriNetUnfolderBase]: 3487/6801 cut-off events. [2023-11-29 04:25:45,591 INFO L125 PetriNetUnfolderBase]: For 18601/18601 co-relation queries the response was YES. [2023-11-29 04:25:45,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18564 conditions, 6801 events. 3487/6801 cut-off events. For 18601/18601 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 52942 event pairs, 2006 based on Foata normal form. 120/5721 useless extension candidates. Maximal degree in co-relation 18539. Up to 2649 conditions per place. [2023-11-29 04:25:45,619 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 52 selfloop transitions, 5 changer transitions 90/152 dead transitions. [2023-11-29 04:25:45,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1427 flow [2023-11-29 04:25:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:25:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 04:25:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2023-11-29 04:25:45,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 04:25:45,621 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 145 transitions. [2023-11-29 04:25:45,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 145 transitions. [2023-11-29 04:25:45,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:45,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 145 transitions. [2023-11-29 04:25:45,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states 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 04:25:45,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 04:25:45,623 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 29.0) internal successors, (319), 11 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 04:25:45,624 INFO L175 Difference]: Start difference. First operand has 88 places, 61 transitions, 498 flow. Second operand 10 states and 145 transitions. [2023-11-29 04:25:45,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1427 flow [2023-11-29 04:25:45,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 152 transitions, 1352 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-11-29 04:25:45,673 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 543 flow [2023-11-29 04:25:45,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=543, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-11-29 04:25:45,674 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-11-29 04:25:45,674 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 543 flow [2023-11-29 04:25:45,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.807692307692308) internal successors, (255), 26 states have internal predecessors, (255), 0 states have call successors, (0), 0 states 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 04:25:45,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:45,675 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:45,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:25:45,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:25:45,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:45,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash 782912447, now seen corresponding path program 7 times [2023-11-29 04:25:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:45,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143669046] [2023-11-29 04:25:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:45,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:25:46,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143669046] [2023-11-29 04:25:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143669046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:46,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255873247] [2023-11-29 04:25:46,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:25:46,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:46,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:46,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:25:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:46,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:25:46,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:25:46,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:25:46,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255873247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:46,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:46,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-11-29 04:25:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840936631] [2023-11-29 04:25:46,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:46,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:25:46,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:25:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:25:46,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:46,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 543 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 04:25:46,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:46,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:46,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:47,073 INFO L124 PetriNetUnfolderBase]: 2894/5446 cut-off events. [2023-11-29 04:25:47,073 INFO L125 PetriNetUnfolderBase]: For 22039/22039 co-relation queries the response was YES. [2023-11-29 04:25:47,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16494 conditions, 5446 events. 2894/5446 cut-off events. For 22039/22039 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 38894 event pairs, 637 based on Foata normal form. 20/4513 useless extension candidates. Maximal degree in co-relation 16464. Up to 1280 conditions per place. [2023-11-29 04:25:47,099 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 85 selfloop transitions, 51 changer transitions 0/141 dead transitions. [2023-11-29 04:25:47,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 141 transitions, 1370 flow [2023-11-29 04:25:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:25:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 04:25:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-29 04:25:47,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954022988505747 [2023-11-29 04:25:47,100 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-29 04:25:47,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-29 04:25:47,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:47,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-29 04:25:47,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states 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 04:25:47,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 04:25:47,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 04:25:47,102 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 543 flow. Second operand 6 states and 121 transitions. [2023-11-29 04:25:47,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 141 transitions, 1370 flow [2023-11-29 04:25:47,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 1232 flow, removed 65 selfloop flow, removed 8 redundant places. [2023-11-29 04:25:47,160 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 918 flow [2023-11-29 04:25:47,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=918, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2023-11-29 04:25:47,160 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2023-11-29 04:25:47,160 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 918 flow [2023-11-29 04:25:47,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 04:25:47,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:47,161 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:47,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:25:47,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:25:47,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:47,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:47,362 INFO L85 PathProgramCache]: Analyzing trace with hash -319998128, now seen corresponding path program 8 times [2023-11-29 04:25:47,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:47,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258930395] [2023-11-29 04:25:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:47,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:48,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258930395] [2023-11-29 04:25:48,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258930395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:48,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933606154] [2023-11-29 04:25:48,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:25:48,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:48,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:48,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:48,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:25:48,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:25:48,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:48,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 04:25:48,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:25:48,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:48,840 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:25:48,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 04:25:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:25:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933606154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:49,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 32 [2023-11-29 04:25:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740666952] [2023-11-29 04:25:49,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:49,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:25:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:25:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:25:49,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:49,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 918 flow. Second operand has 33 states, 33 states have (on average 9.515151515151516) internal successors, (314), 33 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 04:25:49,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:49,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:49,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:25:53,140 INFO L124 PetriNetUnfolderBase]: 7320/13903 cut-off events. [2023-11-29 04:25:53,141 INFO L125 PetriNetUnfolderBase]: For 66507/66507 co-relation queries the response was YES. [2023-11-29 04:25:53,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43172 conditions, 13903 events. 7320/13903 cut-off events. For 66507/66507 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 114111 event pairs, 493 based on Foata normal form. 16/11508 useless extension candidates. Maximal degree in co-relation 43145. Up to 2128 conditions per place. [2023-11-29 04:25:53,207 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 391 selfloop transitions, 184 changer transitions 223/803 dead transitions. [2023-11-29 04:25:53,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 803 transitions, 6119 flow [2023-11-29 04:25:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 04:25:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-29 04:25:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1165 transitions. [2023-11-29 04:25:53,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376573617952929 [2023-11-29 04:25:53,214 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 1165 transitions. [2023-11-29 04:25:53,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 1165 transitions. [2023-11-29 04:25:53,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:25:53,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 1165 transitions. [2023-11-29 04:25:53,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 18.49206349206349) internal successors, (1165), 63 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 04:25:53,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 29.0) internal successors, (1856), 64 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states 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 04:25:53,223 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 29.0) internal successors, (1856), 64 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states 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 04:25:53,223 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 918 flow. Second operand 63 states and 1165 transitions. [2023-11-29 04:25:53,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 803 transitions, 6119 flow [2023-11-29 04:25:53,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 803 transitions, 5551 flow, removed 284 selfloop flow, removed 0 redundant places. [2023-11-29 04:25:53,334 INFO L231 Difference]: Finished difference. Result has 163 places, 213 transitions, 2827 flow [2023-11-29 04:25:53,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2827, PETRI_PLACES=163, PETRI_TRANSITIONS=213} [2023-11-29 04:25:53,335 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 135 predicate places. [2023-11-29 04:25:53,335 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 213 transitions, 2827 flow [2023-11-29 04:25:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.515151515151516) internal successors, (314), 33 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 04:25:53,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:25:53,336 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:25:53,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:25:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:25:53,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:25:53,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:25:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1942008732, now seen corresponding path program 9 times [2023-11-29 04:25:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:25:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332136266] [2023-11-29 04:25:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:25:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:25:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:25:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:25:54,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:25:54,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332136266] [2023-11-29 04:25:54,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332136266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:25:54,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760968574] [2023-11-29 04:25:54,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:25:54,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:25:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:25:54,338 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:25:54,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:25:54,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:25:54,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:25:54,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 04:25:54,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:25:55,558 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-29 04:25:55,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-29 04:25:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:25:55,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:25:56,023 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 04:25:56,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2023-11-29 04:25:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:25:56,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760968574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:25:56,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:25:56,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2023-11-29 04:25:56,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340394210] [2023-11-29 04:25:56,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:25:56,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 04:25:56,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:25:56,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 04:25:56,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 04:25:56,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:25:56,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 213 transitions, 2827 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 04:25:56,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:25:56,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:25:56,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:26:09,222 INFO L124 PetriNetUnfolderBase]: 23759/45189 cut-off events. [2023-11-29 04:26:09,222 INFO L125 PetriNetUnfolderBase]: For 160420/160420 co-relation queries the response was YES. [2023-11-29 04:26:09,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134145 conditions, 45189 events. 23759/45189 cut-off events. For 160420/160420 co-relation queries the response was YES. Maximal size of possible extension queue 1603. Compared 442555 event pairs, 5314 based on Foata normal form. 17/37416 useless extension candidates. Maximal degree in co-relation 134101. Up to 10167 conditions per place. [2023-11-29 04:26:09,574 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 332 selfloop transitions, 257 changer transitions 574/1168 dead transitions. [2023-11-29 04:26:09,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1168 transitions, 13414 flow [2023-11-29 04:26:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 04:26:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-29 04:26:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 978 transitions. [2023-11-29 04:26:09,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6245210727969349 [2023-11-29 04:26:09,580 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 978 transitions. [2023-11-29 04:26:09,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 978 transitions. [2023-11-29 04:26:09,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:26:09,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 978 transitions. [2023-11-29 04:26:09,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 18.11111111111111) internal successors, (978), 54 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 04:26:09,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 29.0) internal successors, (1595), 55 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states 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 04:26:09,592 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 29.0) internal successors, (1595), 55 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states 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 04:26:09,592 INFO L175 Difference]: Start difference. First operand has 163 places, 213 transitions, 2827 flow. Second operand 54 states and 978 transitions. [2023-11-29 04:26:09,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1168 transitions, 13414 flow [2023-11-29 04:26:10,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 1168 transitions, 10883 flow, removed 723 selfloop flow, removed 15 redundant places. [2023-11-29 04:26:10,977 INFO L231 Difference]: Finished difference. Result has 215 places, 375 transitions, 4752 flow [2023-11-29 04:26:10,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=4752, PETRI_PLACES=215, PETRI_TRANSITIONS=375} [2023-11-29 04:26:10,978 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 187 predicate places. [2023-11-29 04:26:10,978 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 375 transitions, 4752 flow [2023-11-29 04:26:10,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 04:26:10,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:26:10,979 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:26:10,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 04:26:11,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:11,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:26:11,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:26:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2036085108, now seen corresponding path program 10 times [2023-11-29 04:26:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:26:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380310376] [2023-11-29 04:26:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:26:11,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:26:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:26:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:26:11,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:26:11,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380310376] [2023-11-29 04:26:11,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380310376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:26:11,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619238822] [2023-11-29 04:26:11,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:26:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:11,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:26:11,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:26:11,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:26:12,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:26:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:26:12,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 04:26:12,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 32 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:26:16,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:16,571 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:26:16,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-29 04:26:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 04:26:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619238822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:16,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:16,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 23 [2023-11-29 04:26:16,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876526078] [2023-11-29 04:26:16,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:16,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:26:16,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:16,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:26:16,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=432, Unknown=1, NotChecked=0, Total=552 [2023-11-29 04:26:16,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:26:16,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 375 transitions, 4752 flow. Second operand has 24 states, 24 states have (on average 9.916666666666666) internal successors, (238), 24 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 04:26:16,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:26:16,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:26:16,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:26:33,723 INFO L124 PetriNetUnfolderBase]: 19042/35802 cut-off events. [2023-11-29 04:26:33,723 INFO L125 PetriNetUnfolderBase]: For 132827/132827 co-relation queries the response was YES. [2023-11-29 04:26:33,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104940 conditions, 35802 events. 19042/35802 cut-off events. For 132827/132827 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 334767 event pairs, 1629 based on Foata normal form. 65/29640 useless extension candidates. Maximal degree in co-relation 104883. Up to 5520 conditions per place. [2023-11-29 04:26:34,170 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 406 selfloop transitions, 514 changer transitions 170/1095 dead transitions. [2023-11-29 04:26:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1095 transitions, 11317 flow [2023-11-29 04:26:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 04:26:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-29 04:26:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1101 transitions. [2023-11-29 04:26:34,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434833430742256 [2023-11-29 04:26:34,174 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 1101 transitions. [2023-11-29 04:26:34,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 1101 transitions. [2023-11-29 04:26:34,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:26:34,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 1101 transitions. [2023-11-29 04:26:34,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 18.661016949152543) internal successors, (1101), 59 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states 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 04:26:34,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 29.0) internal successors, (1740), 60 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 04:26:34,200 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 29.0) internal successors, (1740), 60 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 04:26:34,200 INFO L175 Difference]: Start difference. First operand has 215 places, 375 transitions, 4752 flow. Second operand 59 states and 1101 transitions. [2023-11-29 04:26:34,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1095 transitions, 11317 flow [2023-11-29 04:26:35,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1095 transitions, 11076 flow, removed 104 selfloop flow, removed 15 redundant places. [2023-11-29 04:26:35,110 INFO L231 Difference]: Finished difference. Result has 262 places, 541 transitions, 8603 flow [2023-11-29 04:26:35,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=8603, PETRI_PLACES=262, PETRI_TRANSITIONS=541} [2023-11-29 04:26:35,111 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 234 predicate places. [2023-11-29 04:26:35,111 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 541 transitions, 8603 flow [2023-11-29 04:26:35,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.916666666666666) internal successors, (238), 24 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 04:26:35,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:26:35,112 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:26:35,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:26:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:35,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:26:35,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:26:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1804896288, now seen corresponding path program 11 times [2023-11-29 04:26:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:26:35,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790963662] [2023-11-29 04:26:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:26:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:26:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:26:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:26:36,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:26:36,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790963662] [2023-11-29 04:26:36,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790963662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:26:36,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568780958] [2023-11-29 04:26:36,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:26:36,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:26:36,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:26:36,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:26:36,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 04:26:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:26:36,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 04:26:36,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:26:36,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:36,982 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:26:36,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-29 04:26:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:26:37,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568780958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:37,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:37,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2023-11-29 04:26:37,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595295392] [2023-11-29 04:26:37,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 04:26:37,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:37,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 04:26:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 04:26:37,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:26:37,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 541 transitions, 8603 flow. Second operand has 36 states, 36 states have (on average 9.555555555555555) internal successors, (344), 36 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 04:26:37,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:26:37,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:26:37,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:26:55,237 INFO L124 PetriNetUnfolderBase]: 26460/49831 cut-off events. [2023-11-29 04:26:55,237 INFO L125 PetriNetUnfolderBase]: For 333592/333592 co-relation queries the response was YES. [2023-11-29 04:26:55,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159538 conditions, 49831 events. 26460/49831 cut-off events. For 333592/333592 co-relation queries the response was YES. Maximal size of possible extension queue 1714. Compared 489406 event pairs, 1917 based on Foata normal form. 58/41268 useless extension candidates. Maximal degree in co-relation 159462. Up to 7648 conditions per place. [2023-11-29 04:26:55,794 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 631 selfloop transitions, 660 changer transitions 244/1540 dead transitions. [2023-11-29 04:26:55,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1540 transitions, 19347 flow [2023-11-29 04:26:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 04:26:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-11-29 04:26:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 1552 transitions. [2023-11-29 04:26:55,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6526492851135408 [2023-11-29 04:26:55,800 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 1552 transitions. [2023-11-29 04:26:55,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 1552 transitions. [2023-11-29 04:26:55,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:26:55,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 1552 transitions. [2023-11-29 04:26:55,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 18.926829268292682) internal successors, (1552), 82 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states 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 04:26:55,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 29.0) internal successors, (2407), 83 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 04:26:55,811 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 29.0) internal successors, (2407), 83 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 04:26:55,811 INFO L175 Difference]: Start difference. First operand has 262 places, 541 transitions, 8603 flow. Second operand 82 states and 1552 transitions. [2023-11-29 04:26:55,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1540 transitions, 19347 flow [2023-11-29 04:26:59,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1540 transitions, 17197 flow, removed 803 selfloop flow, removed 27 redundant places. [2023-11-29 04:26:59,167 INFO L231 Difference]: Finished difference. Result has 344 places, 733 transitions, 12114 flow [2023-11-29 04:26:59,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=7447, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=12114, PETRI_PLACES=344, PETRI_TRANSITIONS=733} [2023-11-29 04:26:59,168 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 316 predicate places. [2023-11-29 04:26:59,168 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 733 transitions, 12114 flow [2023-11-29 04:26:59,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.555555555555555) internal successors, (344), 36 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 04:26:59,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:26:59,169 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:26:59,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 04:26:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:59,370 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:26:59,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:26:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash -829318422, now seen corresponding path program 12 times [2023-11-29 04:26:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:26:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107687436] [2023-11-29 04:26:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:26:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:26:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:26:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:26:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:26:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107687436] [2023-11-29 04:26:59,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107687436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:26:59,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196063031] [2023-11-29 04:26:59,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:26:59,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:26:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:26:59,503 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:26:59,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:26:59,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 04:26:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:26:59,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:26:59,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:26:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 04:26:59,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:26:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-29 04:26:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196063031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:26:59,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:26:59,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-29 04:26:59,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187823981] [2023-11-29 04:26:59,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:26:59,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:26:59,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:26:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:26:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:26:59,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:26:59,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 733 transitions, 12114 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 04:26:59,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:26:59,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:26:59,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:27:22,567 INFO L124 PetriNetUnfolderBase]: 37984/70797 cut-off events. [2023-11-29 04:27:22,567 INFO L125 PetriNetUnfolderBase]: For 489206/489206 co-relation queries the response was YES. [2023-11-29 04:27:23,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232305 conditions, 70797 events. 37984/70797 cut-off events. For 489206/489206 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 725032 event pairs, 6205 based on Foata normal form. 20/58486 useless extension candidates. Maximal degree in co-relation 232216. Up to 14418 conditions per place. [2023-11-29 04:27:23,574 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 222 selfloop transitions, 780 changer transitions 0/1007 dead transitions. [2023-11-29 04:27:23,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1007 transitions, 18892 flow [2023-11-29 04:27:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:27:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 04:27:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2023-11-29 04:27:23,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7044334975369458 [2023-11-29 04:27:23,575 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 143 transitions. [2023-11-29 04:27:23,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 143 transitions. [2023-11-29 04:27:23,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:27:23,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 143 transitions. [2023-11-29 04:27:23,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 04:27:23,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 04:27:23,577 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 04:27:23,577 INFO L175 Difference]: Start difference. First operand has 344 places, 733 transitions, 12114 flow. Second operand 7 states and 143 transitions. [2023-11-29 04:27:23,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1007 transitions, 18892 flow [2023-11-29 04:27:28,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1007 transitions, 17906 flow, removed 470 selfloop flow, removed 13 redundant places. [2023-11-29 04:27:28,228 INFO L231 Difference]: Finished difference. Result has 338 places, 942 transitions, 17150 flow [2023-11-29 04:27:28,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11474, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17150, PETRI_PLACES=338, PETRI_TRANSITIONS=942} [2023-11-29 04:27:28,230 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 310 predicate places. [2023-11-29 04:27:28,230 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 942 transitions, 17150 flow [2023-11-29 04:27:28,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 04:27:28,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:27:28,230 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:27:28,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:27:28,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:28,431 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:27:28,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:27:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -120449803, now seen corresponding path program 13 times [2023-11-29 04:27:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:27:28,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909266477] [2023-11-29 04:27:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:27:28,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:27:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:27:29,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:27:29,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909266477] [2023-11-29 04:27:29,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909266477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:27:29,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755427103] [2023-11-29 04:27:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:27:29,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:27:29,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:27:29,346 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:27:29,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:27:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:27:29,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 04:27:29,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:27:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:27:29,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:27:29,894 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:27:29,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 04:27:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 04:27:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755427103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:27:30,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:27:30,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 8] total 38 [2023-11-29 04:27:30,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921402279] [2023-11-29 04:27:30,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:27:30,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 04:27:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:27:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 04:27:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 04:27:30,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:27:30,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 942 transitions, 17150 flow. Second operand has 39 states, 39 states have (on average 9.435897435897436) internal successors, (368), 39 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 04:27:30,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:27:30,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:27:30,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:28:00,205 INFO L124 PetriNetUnfolderBase]: 40866/76533 cut-off events. [2023-11-29 04:28:00,206 INFO L125 PetriNetUnfolderBase]: For 646964/646964 co-relation queries the response was YES. [2023-11-29 04:28:01,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262066 conditions, 76533 events. 40866/76533 cut-off events. For 646964/646964 co-relation queries the response was YES. Maximal size of possible extension queue 2645. Compared 792545 event pairs, 4325 based on Foata normal form. 20/63286 useless extension candidates. Maximal degree in co-relation 261975. Up to 11776 conditions per place. [2023-11-29 04:28:01,252 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 514 selfloop transitions, 917 changer transitions 158/1594 dead transitions. [2023-11-29 04:28:01,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1594 transitions, 25861 flow [2023-11-29 04:28:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 04:28:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-29 04:28:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1130 transitions. [2023-11-29 04:28:01,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6387789711701526 [2023-11-29 04:28:01,256 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 1130 transitions. [2023-11-29 04:28:01,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 1130 transitions. [2023-11-29 04:28:01,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:28:01,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 1130 transitions. [2023-11-29 04:28:01,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 18.524590163934427) internal successors, (1130), 61 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 04:28:01,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 29.0) internal successors, (1798), 62 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 04:28:01,264 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 29.0) internal successors, (1798), 62 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states 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 04:28:01,264 INFO L175 Difference]: Start difference. First operand has 338 places, 942 transitions, 17150 flow. Second operand 61 states and 1130 transitions. [2023-11-29 04:28:01,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1594 transitions, 25861 flow [2023-11-29 04:28:08,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1594 transitions, 24839 flow, removed 511 selfloop flow, removed 0 redundant places. [2023-11-29 04:28:08,766 INFO L231 Difference]: Finished difference. Result has 419 places, 1029 transitions, 20261 flow [2023-11-29 04:28:08,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16460, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=20261, PETRI_PLACES=419, PETRI_TRANSITIONS=1029} [2023-11-29 04:28:08,768 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 391 predicate places. [2023-11-29 04:28:08,768 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1029 transitions, 20261 flow [2023-11-29 04:28:08,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.435897435897436) internal successors, (368), 39 states have internal predecessors, (368), 0 states have call successors, (0), 0 states 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 04:28:08,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:28:08,768 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:28:08,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:28:08,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:08,969 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:28:08,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:28:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash 406927783, now seen corresponding path program 14 times [2023-11-29 04:28:08,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:28:08,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186706600] [2023-11-29 04:28:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:28:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:28:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:28:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:28:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186706600] [2023-11-29 04:28:09,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186706600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:28:09,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180947366] [2023-11-29 04:28:09,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:28:09,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:28:09,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:28:09,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:28:09,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:28:09,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:28:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:28:09,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 04:28:09,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:28:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:10,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:28:11,088 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 04:28:11,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2023-11-29 04:28:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:28:12,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180947366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:28:12,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:28:12,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2023-11-29 04:28:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112801023] [2023-11-29 04:28:12,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:28:12,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 04:28:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:28:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 04:28:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 04:28:12,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:28:12,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1029 transitions, 20261 flow. Second operand has 51 states, 51 states have (on average 9.137254901960784) internal successors, (466), 51 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 04:28:12,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:28:12,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:28:12,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:30:02,603 INFO L124 PetriNetUnfolderBase]: 124923/236719 cut-off events. [2023-11-29 04:30:02,603 INFO L125 PetriNetUnfolderBase]: For 2205644/2205644 co-relation queries the response was YES. [2023-11-29 04:30:06,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807265 conditions, 236719 events. 124923/236719 cut-off events. For 2205644/2205644 co-relation queries the response was YES. Maximal size of possible extension queue 7808. Compared 2847795 event pairs, 48312 based on Foata normal form. 96/196297 useless extension candidates. Maximal degree in co-relation 807152. Up to 60769 conditions per place. [2023-11-29 04:30:06,553 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 1230 selfloop transitions, 226 changer transitions 2117/3578 dead transitions. [2023-11-29 04:30:06,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 3578 transitions, 71323 flow [2023-11-29 04:30:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 04:30:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 04:30:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 817 transitions. [2023-11-29 04:30:06,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124437781109445 [2023-11-29 04:30:06,556 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 817 transitions. [2023-11-29 04:30:06,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 817 transitions. [2023-11-29 04:30:06,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:30:06,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 817 transitions. [2023-11-29 04:30:06,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 17.76086956521739) internal successors, (817), 46 states have internal predecessors, (817), 0 states have call successors, (0), 0 states 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 04:30:06,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 29.0) internal successors, (1363), 47 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states 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 04:30:06,562 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 29.0) internal successors, (1363), 47 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states 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 04:30:06,562 INFO L175 Difference]: Start difference. First operand has 419 places, 1029 transitions, 20261 flow. Second operand 46 states and 817 transitions. [2023-11-29 04:30:06,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 3578 transitions, 71323 flow [2023-11-29 04:31:15,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 3578 transitions, 63498 flow, removed 1096 selfloop flow, removed 18 redundant places. [2023-11-29 04:31:15,431 INFO L231 Difference]: Finished difference. Result has 454 places, 1134 transitions, 21747 flow [2023-11-29 04:31:15,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17664, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=21747, PETRI_PLACES=454, PETRI_TRANSITIONS=1134} [2023-11-29 04:31:15,433 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 426 predicate places. [2023-11-29 04:31:15,433 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1134 transitions, 21747 flow [2023-11-29 04:31:15,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 9.137254901960784) internal successors, (466), 51 states have internal predecessors, (466), 0 states have call successors, (0), 0 states 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 04:31:15,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:31:15,433 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:31:15,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 04:31:15,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:31:15,634 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:31:15,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:31:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 240717299, now seen corresponding path program 15 times [2023-11-29 04:31:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:31:15,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773462302] [2023-11-29 04:31:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:31:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:31:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:31:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:31:16,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:31:16,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773462302] [2023-11-29 04:31:16,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773462302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:31:16,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805635571] [2023-11-29 04:31:16,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:31:16,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:31:16,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:31:16,511 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:31:16,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:31:16,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:31:16,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:31:16,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 04:31:16,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:31:16,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 04:31:17,699 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-29 04:31:17,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-29 04:31:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 04:31:17,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:31:19,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-11-29 04:31:19,966 INFO L349 Elim1Store]: treesize reduction 5, result has 54.5 percent of original size [2023-11-29 04:31:19,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 46 [2023-11-29 04:31:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 04:31:20,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805635571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:31:20,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:31:20,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 43 [2023-11-29 04:31:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112069439] [2023-11-29 04:31:20,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:31:20,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 04:31:20,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:31:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 04:31:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1609, Unknown=1, NotChecked=0, Total=1892 [2023-11-29 04:31:20,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:31:20,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1134 transitions, 21747 flow. Second operand has 44 states, 44 states have (on average 9.204545454545455) internal successors, (405), 44 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 04:31:20,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:31:20,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:31:20,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:32:10,594 INFO L124 PetriNetUnfolderBase]: 54589/104188 cut-off events. [2023-11-29 04:32:10,594 INFO L125 PetriNetUnfolderBase]: For 1220347/1220347 co-relation queries the response was YES. [2023-11-29 04:32:11,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348319 conditions, 104188 events. 54589/104188 cut-off events. For 1220347/1220347 co-relation queries the response was YES. Maximal size of possible extension queue 3477. Compared 1143145 event pairs, 11446 based on Foata normal form. 31/86221 useless extension candidates. Maximal degree in co-relation 348200. Up to 39216 conditions per place. [2023-11-29 04:32:12,281 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 952 selfloop transitions, 661 changer transitions 373/1991 dead transitions. [2023-11-29 04:32:12,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 1991 transitions, 32664 flow [2023-11-29 04:32:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 04:32:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-11-29 04:32:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1176 transitions. [2023-11-29 04:32:12,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238726790450928 [2023-11-29 04:32:12,284 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 1176 transitions. [2023-11-29 04:32:12,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 1176 transitions. [2023-11-29 04:32:12,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:32:12,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 1176 transitions. [2023-11-29 04:32:12,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 18.092307692307692) internal successors, (1176), 65 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states 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 04:32:12,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 29.0) internal successors, (1914), 66 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states 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 04:32:12,291 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 29.0) internal successors, (1914), 66 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states 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 04:32:12,291 INFO L175 Difference]: Start difference. First operand has 454 places, 1134 transitions, 21747 flow. Second operand 65 states and 1176 transitions. [2023-11-29 04:32:12,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 1991 transitions, 32664 flow [2023-11-29 04:32:31,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1991 transitions, 30779 flow, removed 883 selfloop flow, removed 15 redundant places. [2023-11-29 04:32:31,085 INFO L231 Difference]: Finished difference. Result has 513 places, 1196 transitions, 23234 flow [2023-11-29 04:32:31,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19998, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=23234, PETRI_PLACES=513, PETRI_TRANSITIONS=1196} [2023-11-29 04:32:31,086 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 485 predicate places. [2023-11-29 04:32:31,086 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1196 transitions, 23234 flow [2023-11-29 04:32:31,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 9.204545454545455) internal successors, (405), 44 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 04:32:31,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:32:31,086 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:32:31,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:32:31,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:31,287 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:32:31,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:32:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash -306276685, now seen corresponding path program 16 times [2023-11-29 04:32:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:32:31,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562676562] [2023-11-29 04:32:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:32:31,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:32:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:32:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:32:31,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:32:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562676562] [2023-11-29 04:32:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562676562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:32:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308917066] [2023-11-29 04:32:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:32:31,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:32:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:32:31,908 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:32:31,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:32:32,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:32:32,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:32:32,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 04:32:32,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:32:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:32:32,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:32:32,440 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:32:32,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-29 04:32:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 77 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 04:32:32,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308917066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:32:32,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:32:32,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 12] total 39 [2023-11-29 04:32:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552037612] [2023-11-29 04:32:32,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:32:32,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 04:32:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:32:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 04:32:32,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:32:32,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:32:32,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1196 transitions, 23234 flow. Second operand has 40 states, 40 states have (on average 9.525) internal successors, (381), 40 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 04:32:32,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:32:32,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:32:32,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:33:31,399 INFO L124 PetriNetUnfolderBase]: 70659/133413 cut-off events. [2023-11-29 04:33:31,400 INFO L125 PetriNetUnfolderBase]: For 1912413/1912413 co-relation queries the response was YES. [2023-11-29 04:33:33,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455725 conditions, 133413 events. 70659/133413 cut-off events. For 1912413/1912413 co-relation queries the response was YES. Maximal size of possible extension queue 4988. Compared 1497350 event pairs, 6266 based on Foata normal form. 104/110279 useless extension candidates. Maximal degree in co-relation 455591. Up to 20624 conditions per place. [2023-11-29 04:33:33,905 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 874 selfloop transitions, 1574 changer transitions 277/2730 dead transitions. [2023-11-29 04:33:33,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 2730 transitions, 47049 flow [2023-11-29 04:33:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 04:33:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-11-29 04:33:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 1986 transitions. [2023-11-29 04:33:33,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6584880636604774 [2023-11-29 04:33:33,910 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 1986 transitions. [2023-11-29 04:33:33,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 1986 transitions. [2023-11-29 04:33:33,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:33:33,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 1986 transitions. [2023-11-29 04:33:33,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 19.096153846153847) internal successors, (1986), 104 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states 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 04:33:33,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 29.0) internal successors, (3045), 105 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 04:33:33,921 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 29.0) internal successors, (3045), 105 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 04:33:33,921 INFO L175 Difference]: Start difference. First operand has 513 places, 1196 transitions, 23234 flow. Second operand 104 states and 1986 transitions. [2023-11-29 04:33:33,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 2730 transitions, 47049 flow [2023-11-29 04:33:57,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2730 transitions, 46308 flow, removed 306 selfloop flow, removed 28 redundant places. [2023-11-29 04:33:57,405 INFO L231 Difference]: Finished difference. Result has 616 places, 1675 transitions, 36027 flow [2023-11-29 04:33:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22853, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=36027, PETRI_PLACES=616, PETRI_TRANSITIONS=1675} [2023-11-29 04:33:57,406 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 588 predicate places. [2023-11-29 04:33:57,406 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 1675 transitions, 36027 flow [2023-11-29 04:33:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.525) internal successors, (381), 40 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 04:33:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:33:57,407 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:33:57,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:33:57,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:33:57,607 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 04:33:57,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:33:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2051384847, now seen corresponding path program 17 times [2023-11-29 04:33:57,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:33:57,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260265652] [2023-11-29 04:33:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:33:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:33:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:33:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:33:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:33:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260265652] [2023-11-29 04:33:58,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260265652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:33:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060698436] [2023-11-29 04:33:58,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:33:58,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:33:58,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:33:58,224 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:33:58,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_375e7527-c1b8-4244-8b16-57e5a32b16d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:33:58,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:33:58,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:33:58,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 04:33:58,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:33:58,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:33:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:33:59,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:33:59,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-11-29 04:33:59,568 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:33:59,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 47 [2023-11-29 04:33:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:33:59,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060698436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:33:59,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:33:59,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 46 [2023-11-29 04:33:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29743673] [2023-11-29 04:33:59,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:33:59,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 04:33:59,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:33:59,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 04:33:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:33:59,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 04:33:59,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 1675 transitions, 36027 flow. Second operand has 47 states, 47 states have (on average 9.085106382978724) internal successors, (427), 47 states have internal predecessors, (427), 0 states have call successors, (0), 0 states 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 04:33:59,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:33:59,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 04:33:59,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand