./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:54:56,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:54:56,525 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:54:56,537 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:54:56,538 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:54:56,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:54:56,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:54:56,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:54:56,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:54:56,580 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:54:56,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:54:56,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:54:56,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:54:56,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:54:56,582 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:54:56,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:54:56,582 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:54:56,583 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:54:56,584 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:54:56,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:54:56,584 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:54:56,584 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:54:56,584 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:54:56,584 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:54:56,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:54:56,585 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:54:56,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:54:56,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:54:56,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:54:56,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:54:56,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:54:56,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:54:56,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:54:56,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:54:56,587 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:54:56,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:54:56,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:54:56,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:54:56,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:54:56,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:54:56,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:54:56,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:54:56,588 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC 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 -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-23 23:54:56,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:54:56,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:54:56,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:54:56,967 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:54:56,968 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:54:56,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-23 23:54:59,929 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/data/68fb6313c/f4affb7a7de34a6c84bfe4873c010edc/FLAG04d7d1543 [2024-11-23 23:55:00,227 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:55:00,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-23 23:55:00,238 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/data/68fb6313c/f4affb7a7de34a6c84bfe4873c010edc/FLAG04d7d1543 [2024-11-23 23:55:00,256 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/data/68fb6313c/f4affb7a7de34a6c84bfe4873c010edc [2024-11-23 23:55:00,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:55:00,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:55:00,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:55:00,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:55:00,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:55:00,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6fa35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00, skipping insertion in model container [2024-11-23 23:55:00,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,287 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:55:00,479 WARN L250 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_92d3736c-5c55-4427-ab67-beefff806144/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2024-11-23 23:55:00,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:55:00,517 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:55:00,569 WARN L250 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_92d3736c-5c55-4427-ab67-beefff806144/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5161,5174] [2024-11-23 23:55:00,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:55:00,597 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:55:00,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00 WrapperNode [2024-11-23 23:55:00,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:55:00,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:55:00,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:55:00,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:55:00,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,614 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,658 INFO L138 Inliner]: procedures = 24, calls = 53, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 331 [2024-11-23 23:55:00,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:55:00,659 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:55:00,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:55:00,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:55:00,670 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,670 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,699 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 23:55:00,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,721 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,732 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,733 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:55:00,741 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:55:00,741 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:55:00,741 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:55:00,742 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (1/1) ... [2024-11-23 23:55:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:55:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:00,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:55:00,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:55:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:55:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:55:00,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:55:00,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:55:00,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:55:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:55:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:55:00,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:55:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:55:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:55:00,815 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:55:00,945 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:55:00,947 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:55:01,658 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:55:01,658 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:55:02,128 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:55:02,129 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:55:02,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:02 BoogieIcfgContainer [2024-11-23 23:55:02,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:55:02,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:55:02,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:55:02,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:55:02,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:55:00" (1/3) ... [2024-11-23 23:55:02,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1127a4f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:55:02, skipping insertion in model container [2024-11-23 23:55:02,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:55:00" (2/3) ... [2024-11-23 23:55:02,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1127a4f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:55:02, skipping insertion in model container [2024-11-23 23:55:02,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:55:02" (3/3) ... [2024-11-23 23:55:02,141 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-23 23:55:02,160 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:55:02,162 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-1.wvr-bad.c that has 4 procedures, 45 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2024-11-23 23:55:02,162 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:55:02,272 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:55:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 61 transitions, 143 flow [2024-11-23 23:55:02,374 INFO L124 PetriNetUnfolderBase]: 17/58 cut-off events. [2024-11-23 23:55:02,377 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:55:02,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 17/58 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 48. Up to 6 conditions per place. [2024-11-23 23:55:02,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 61 transitions, 143 flow [2024-11-23 23:55:02,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 57 transitions, 132 flow [2024-11-23 23:55:02,403 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:55:02,415 INFO L333 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, 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;@7137e1eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:55:02,416 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-23 23:55:02,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:55:02,448 INFO L124 PetriNetUnfolderBase]: 17/56 cut-off events. [2024-11-23 23:55:02,449 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:55:02,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:02,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:02,451 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:02,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1211094217, now seen corresponding path program 1 times [2024-11-23 23:55:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:02,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992976111] [2024-11-23 23:55:02,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:02,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:02,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992976111] [2024-11-23 23:55:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992976111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:02,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810202262] [2024-11-23 23:55:02,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:02,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 23:55:02,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:02,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 23:55:02,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 23:55:02,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:02,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 57 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:02,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:02,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:03,296 INFO L124 PetriNetUnfolderBase]: 1168/1724 cut-off events. [2024-11-23 23:55:03,296 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-23 23:55:03,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3269 conditions, 1724 events. 1168/1724 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6962 event pairs, 608 based on Foata normal form. 0/1335 useless extension candidates. Maximal degree in co-relation 3018. Up to 1448 conditions per place. [2024-11-23 23:55:03,331 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2024-11-23 23:55:03,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 200 flow [2024-11-23 23:55:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 23:55:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 23:55:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 80 transitions. [2024-11-23 23:55:03,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6557377049180327 [2024-11-23 23:55:03,354 INFO L175 Difference]: Start difference. First operand has 50 places, 57 transitions, 132 flow. Second operand 2 states and 80 transitions. [2024-11-23 23:55:03,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 200 flow [2024-11-23 23:55:03,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 188 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:55:03,365 INFO L231 Difference]: Finished difference. Result has 45 places, 54 transitions, 114 flow [2024-11-23 23:55:03,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=54} [2024-11-23 23:55:03,374 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-23 23:55:03,375 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 54 transitions, 114 flow [2024-11-23 23:55:03,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:03,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:03,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:03,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:55:03,376 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:03,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:03,377 INFO L85 PathProgramCache]: Analyzing trace with hash -581155928, now seen corresponding path program 1 times [2024-11-23 23:55:03,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:03,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945763047] [2024-11-23 23:55:03,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:03,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:03,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945763047] [2024-11-23 23:55:03,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945763047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:03,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:03,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833141087] [2024-11-23 23:55:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:03,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:03,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:03,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:03,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:03,812 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:03,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 54 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:03,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:03,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:03,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:04,536 INFO L124 PetriNetUnfolderBase]: 2327/3658 cut-off events. [2024-11-23 23:55:04,538 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-23 23:55:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6607 conditions, 3658 events. 2327/3658 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18920 event pairs, 608 based on Foata normal form. 1/2839 useless extension candidates. Maximal degree in co-relation 6604. Up to 1685 conditions per place. [2024-11-23 23:55:04,573 INFO L140 encePairwiseOnDemand]: 55/61 looper letters, 59 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2024-11-23 23:55:04,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 82 transitions, 305 flow [2024-11-23 23:55:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-23 23:55:04,577 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2024-11-23 23:55:04,578 INFO L175 Difference]: Start difference. First operand has 45 places, 54 transitions, 114 flow. Second operand 3 states and 126 transitions. [2024-11-23 23:55:04,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 82 transitions, 305 flow [2024-11-23 23:55:04,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 305 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 23:55:04,582 INFO L231 Difference]: Finished difference. Result has 48 places, 58 transitions, 147 flow [2024-11-23 23:55:04,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=58} [2024-11-23 23:55:04,584 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-11-23 23:55:04,584 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 58 transitions, 147 flow [2024-11-23 23:55:04,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:04,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:04,585 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:04,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:55:04,587 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:04,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -96336806, now seen corresponding path program 1 times [2024-11-23 23:55:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683243734] [2024-11-23 23:55:04,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:04,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:04,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683243734] [2024-11-23 23:55:04,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683243734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:04,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:04,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:04,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688545194] [2024-11-23 23:55:04,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:04,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:04,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:04,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:04,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:04,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:04,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 58 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:04,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:04,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:04,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:05,726 INFO L124 PetriNetUnfolderBase]: 4376/6666 cut-off events. [2024-11-23 23:55:05,726 INFO L125 PetriNetUnfolderBase]: For 1043/1043 co-relation queries the response was YES. [2024-11-23 23:55:05,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13306 conditions, 6666 events. 4376/6666 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 36162 event pairs, 1536 based on Foata normal form. 236/5370 useless extension candidates. Maximal degree in co-relation 13301. Up to 3068 conditions per place. [2024-11-23 23:55:05,778 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 65 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2024-11-23 23:55:05,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 85 transitions, 353 flow [2024-11-23 23:55:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-23 23:55:05,780 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-11-23 23:55:05,780 INFO L175 Difference]: Start difference. First operand has 48 places, 58 transitions, 147 flow. Second operand 3 states and 124 transitions. [2024-11-23 23:55:05,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 85 transitions, 353 flow [2024-11-23 23:55:05,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:55:05,786 INFO L231 Difference]: Finished difference. Result has 50 places, 60 transitions, 167 flow [2024-11-23 23:55:05,787 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=50, PETRI_TRANSITIONS=60} [2024-11-23 23:55:05,788 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-11-23 23:55:05,789 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 60 transitions, 167 flow [2024-11-23 23:55:05,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:05,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:05,789 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:05,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:55:05,790 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:05,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1331316460, now seen corresponding path program 1 times [2024-11-23 23:55:05,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983127976] [2024-11-23 23:55:05,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:06,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983127976] [2024-11-23 23:55:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983127976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:06,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:55:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188359504] [2024-11-23 23:55:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:06,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:06,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:06,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:06,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:06,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:06,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:06,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:06,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:07,696 INFO L124 PetriNetUnfolderBase]: 8305/13348 cut-off events. [2024-11-23 23:55:07,696 INFO L125 PetriNetUnfolderBase]: For 3342/3366 co-relation queries the response was YES. [2024-11-23 23:55:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27098 conditions, 13348 events. 8305/13348 cut-off events. For 3342/3366 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 88199 event pairs, 2722 based on Foata normal form. 240/10619 useless extension candidates. Maximal degree in co-relation 27092. Up to 5665 conditions per place. [2024-11-23 23:55:07,795 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 74 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-11-23 23:55:07,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 93 transitions, 422 flow [2024-11-23 23:55:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-23 23:55:07,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6885245901639344 [2024-11-23 23:55:07,800 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 167 flow. Second operand 3 states and 126 transitions. [2024-11-23 23:55:07,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 93 transitions, 422 flow [2024-11-23 23:55:07,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 93 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:55:07,808 INFO L231 Difference]: Finished difference. Result has 52 places, 61 transitions, 178 flow [2024-11-23 23:55:07,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=52, PETRI_TRANSITIONS=61} [2024-11-23 23:55:07,809 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-23 23:55:07,809 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 61 transitions, 178 flow [2024-11-23 23:55:07,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:07,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:07,811 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:07,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:55:07,812 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:07,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1152449705, now seen corresponding path program 1 times [2024-11-23 23:55:07,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:07,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853907851] [2024-11-23 23:55:07,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:07,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853907851] [2024-11-23 23:55:07,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853907851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:07,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:07,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522544796] [2024-11-23 23:55:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:07,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:07,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:07,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:07,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:08,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 61 [2024-11-23 23:55:08,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 61 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:08,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:08,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 61 [2024-11-23 23:55:08,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:10,115 INFO L124 PetriNetUnfolderBase]: 13331/19439 cut-off events. [2024-11-23 23:55:10,116 INFO L125 PetriNetUnfolderBase]: For 6515/6537 co-relation queries the response was YES. [2024-11-23 23:55:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42508 conditions, 19439 events. 13331/19439 cut-off events. For 6515/6537 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 114347 event pairs, 6174 based on Foata normal form. 0/15578 useless extension candidates. Maximal degree in co-relation 42501. Up to 10586 conditions per place. [2024-11-23 23:55:10,245 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 69 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2024-11-23 23:55:10,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 89 transitions, 420 flow [2024-11-23 23:55:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-11-23 23:55:10,248 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6338797814207651 [2024-11-23 23:55:10,249 INFO L175 Difference]: Start difference. First operand has 52 places, 61 transitions, 178 flow. Second operand 3 states and 116 transitions. [2024-11-23 23:55:10,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 89 transitions, 420 flow [2024-11-23 23:55:10,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 89 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:55:10,257 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 206 flow [2024-11-23 23:55:10,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2024-11-23 23:55:10,260 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-11-23 23:55:10,261 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 206 flow [2024-11-23 23:55:10,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:10,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:10,262 INFO L206 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, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:10,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:55:10,262 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:10,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1331891046, now seen corresponding path program 1 times [2024-11-23 23:55:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:10,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138375927] [2024-11-23 23:55:10,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:10,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:10,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138375927] [2024-11-23 23:55:10,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138375927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:10,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:10,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:55:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928248701] [2024-11-23 23:55:10,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:10,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:55:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:10,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:55:10,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:55:10,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:10,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:10,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:10,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:10,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:12,137 INFO L124 PetriNetUnfolderBase]: 12942/19994 cut-off events. [2024-11-23 23:55:12,137 INFO L125 PetriNetUnfolderBase]: For 9546/9730 co-relation queries the response was YES. [2024-11-23 23:55:12,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43960 conditions, 19994 events. 12942/19994 cut-off events. For 9546/9730 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 129055 event pairs, 9078 based on Foata normal form. 285/16411 useless extension candidates. Maximal degree in co-relation 43952. Up to 13549 conditions per place. [2024-11-23 23:55:12,256 INFO L140 encePairwiseOnDemand]: 52/61 looper letters, 74 selfloop transitions, 7 changer transitions 0/99 dead transitions. [2024-11-23 23:55:12,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 99 transitions, 462 flow [2024-11-23 23:55:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:55:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:55:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-11-23 23:55:12,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5704918032786885 [2024-11-23 23:55:12,258 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 206 flow. Second operand 5 states and 174 transitions. [2024-11-23 23:55:12,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 99 transitions, 462 flow [2024-11-23 23:55:12,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 99 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:12,292 INFO L231 Difference]: Finished difference. Result has 60 places, 68 transitions, 248 flow [2024-11-23 23:55:12,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=60, PETRI_TRANSITIONS=68} [2024-11-23 23:55:12,295 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-11-23 23:55:12,295 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 68 transitions, 248 flow [2024-11-23 23:55:12,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:12,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:12,296 INFO L206 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:12,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:55:12,297 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:12,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1664312523, now seen corresponding path program 1 times [2024-11-23 23:55:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:12,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178406315] [2024-11-23 23:55:12,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:12,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:12,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178406315] [2024-11-23 23:55:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178406315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:12,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:12,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001260262] [2024-11-23 23:55:12,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:12,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:12,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:12,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:12,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:12,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 61 [2024-11-23 23:55:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 68 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 61 [2024-11-23 23:55:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:14,132 INFO L124 PetriNetUnfolderBase]: 13390/19544 cut-off events. [2024-11-23 23:55:14,132 INFO L125 PetriNetUnfolderBase]: For 5744/6085 co-relation queries the response was YES. [2024-11-23 23:55:14,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43058 conditions, 19544 events. 13390/19544 cut-off events. For 5744/6085 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 106120 event pairs, 5854 based on Foata normal form. 20/16339 useless extension candidates. Maximal degree in co-relation 43047. Up to 10044 conditions per place. [2024-11-23 23:55:14,226 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 67 selfloop transitions, 5 changer transitions 5/90 dead transitions. [2024-11-23 23:55:14,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 458 flow [2024-11-23 23:55:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-23 23:55:14,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6120218579234973 [2024-11-23 23:55:14,228 INFO L175 Difference]: Start difference. First operand has 60 places, 68 transitions, 248 flow. Second operand 3 states and 112 transitions. [2024-11-23 23:55:14,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 458 flow [2024-11-23 23:55:14,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 454 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 23:55:14,236 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 228 flow [2024-11-23 23:55:14,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-11-23 23:55:14,237 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-11-23 23:55:14,237 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 228 flow [2024-11-23 23:55:14,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:14,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:14,238 INFO L206 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:14,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:55:14,238 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:14,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1323300852, now seen corresponding path program 1 times [2024-11-23 23:55:14,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:14,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110926922] [2024-11-23 23:55:14,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:14,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:15,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110926922] [2024-11-23 23:55:15,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110926922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730079659] [2024-11-23 23:55:15,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:15,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:15,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:15,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:15,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:55:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:15,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:55:15,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:15,739 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 [2024-11-23 23:55:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:16,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:16,872 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 33 treesize of output 29 [2024-11-23 23:55:16,897 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-23 23:55:16,898 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 62 treesize of output 41 [2024-11-23 23:55:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:55:16,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730079659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:16,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:16,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-11-23 23:55:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885637466] [2024-11-23 23:55:16,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:16,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 23:55:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:16,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 23:55:16,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-11-23 23:55:16,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:16,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 228 flow. Second operand has 22 states, 22 states have (on average 24.09090909090909) internal successors, (530), 22 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:16,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:16,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:16,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:24,938 INFO L124 PetriNetUnfolderBase]: 49834/75960 cut-off events. [2024-11-23 23:55:24,939 INFO L125 PetriNetUnfolderBase]: For 44527/46918 co-relation queries the response was YES. [2024-11-23 23:55:25,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175155 conditions, 75960 events. 49834/75960 cut-off events. For 44527/46918 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 554954 event pairs, 5393 based on Foata normal form. 60/60648 useless extension candidates. Maximal degree in co-relation 175143. Up to 11894 conditions per place. [2024-11-23 23:55:25,273 INFO L140 encePairwiseOnDemand]: 41/61 looper letters, 342 selfloop transitions, 72 changer transitions 9/442 dead transitions. [2024-11-23 23:55:25,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 442 transitions, 2281 flow [2024-11-23 23:55:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 23:55:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-23 23:55:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 873 transitions. [2024-11-23 23:55:25,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6222380612972203 [2024-11-23 23:55:25,278 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 228 flow. Second operand 23 states and 873 transitions. [2024-11-23 23:55:25,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 442 transitions, 2281 flow [2024-11-23 23:55:25,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 442 transitions, 2195 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-11-23 23:55:25,323 INFO L231 Difference]: Finished difference. Result has 93 places, 134 transitions, 901 flow [2024-11-23 23:55:25,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=901, PETRI_PLACES=93, PETRI_TRANSITIONS=134} [2024-11-23 23:55:25,325 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-11-23 23:55:25,325 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 134 transitions, 901 flow [2024-11-23 23:55:25,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.09090909090909) internal successors, (530), 22 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:25,325 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:25,326 INFO L206 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:25,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:55:25,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:25,526 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:25,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1239154986, now seen corresponding path program 1 times [2024-11-23 23:55:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:25,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989324321] [2024-11-23 23:55:25,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989324321] [2024-11-23 23:55:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989324321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:25,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:25,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:55:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279999844] [2024-11-23 23:55:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:25,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:25,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:25,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:25,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:25,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 61 [2024-11-23 23:55:25,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 134 transitions, 901 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:25,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:25,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 61 [2024-11-23 23:55:25,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:36,012 INFO L124 PetriNetUnfolderBase]: 70350/106081 cut-off events. [2024-11-23 23:55:36,013 INFO L125 PetriNetUnfolderBase]: For 207022/211824 co-relation queries the response was YES. [2024-11-23 23:55:36,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323922 conditions, 106081 events. 70350/106081 cut-off events. For 207022/211824 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 791842 event pairs, 36619 based on Foata normal form. 136/84978 useless extension candidates. Maximal degree in co-relation 323898. Up to 69060 conditions per place. [2024-11-23 23:55:36,939 INFO L140 encePairwiseOnDemand]: 56/61 looper letters, 129 selfloop transitions, 8 changer transitions 2/155 dead transitions. [2024-11-23 23:55:36,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 155 transitions, 1276 flow [2024-11-23 23:55:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-11-23 23:55:36,941 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6338797814207651 [2024-11-23 23:55:36,941 INFO L175 Difference]: Start difference. First operand has 93 places, 134 transitions, 901 flow. Second operand 3 states and 116 transitions. [2024-11-23 23:55:36,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 155 transitions, 1276 flow [2024-11-23 23:55:38,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 155 transitions, 1210 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-11-23 23:55:38,109 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 766 flow [2024-11-23 23:55:38,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=766, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-11-23 23:55:38,110 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-11-23 23:55:38,110 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 766 flow [2024-11-23 23:55:38,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:38,111 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:38,111 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:38,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 23:55:38,111 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:38,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash 622797277, now seen corresponding path program 1 times [2024-11-23 23:55:38,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:38,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984219829] [2024-11-23 23:55:38,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:38,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:55:38,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:38,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984219829] [2024-11-23 23:55:38,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984219829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:55:38,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:55:38,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:55:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444471114] [2024-11-23 23:55:38,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:55:38,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:55:38,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:38,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:55:38,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:55:38,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:38,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 766 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:38,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:38,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:38,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:55:48,095 INFO L124 PetriNetUnfolderBase]: 60126/93918 cut-off events. [2024-11-23 23:55:48,095 INFO L125 PetriNetUnfolderBase]: For 267868/274469 co-relation queries the response was YES. [2024-11-23 23:55:48,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300426 conditions, 93918 events. 60126/93918 cut-off events. For 267868/274469 co-relation queries the response was YES. Maximal size of possible extension queue 1786. Compared 718608 event pairs, 18351 based on Foata normal form. 1136/75848 useless extension candidates. Maximal degree in co-relation 300401. Up to 54699 conditions per place. [2024-11-23 23:55:48,632 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 131 selfloop transitions, 2 changer transitions 0/153 dead transitions. [2024-11-23 23:55:48,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 153 transitions, 1234 flow [2024-11-23 23:55:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:55:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:55:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-23 23:55:48,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-23 23:55:48,634 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 766 flow. Second operand 3 states and 122 transitions. [2024-11-23 23:55:48,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 153 transitions, 1234 flow [2024-11-23 23:55:50,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 153 transitions, 1198 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-23 23:55:50,549 INFO L231 Difference]: Finished difference. Result has 92 places, 115 transitions, 692 flow [2024-11-23 23:55:50,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=692, PETRI_PLACES=92, PETRI_TRANSITIONS=115} [2024-11-23 23:55:50,550 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-11-23 23:55:50,551 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 115 transitions, 692 flow [2024-11-23 23:55:50,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:50,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:55:50,551 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:55:50,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:55:50,552 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 23:55:50,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:55:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash -546293923, now seen corresponding path program 1 times [2024-11-23 23:55:50,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:55:50,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559465679] [2024-11-23 23:55:50,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:55:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:55:52,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:55:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559465679] [2024-11-23 23:55:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559465679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:55:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769116619] [2024-11-23 23:55:52,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:55:52,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:55:52,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:55:52,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:55:52,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92d3736c-5c55-4427-ab67-beefff806144/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:55:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:55:52,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:55:52,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:55:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:55:52,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:55:52,677 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-23 23:55:52,678 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 19 treesize of output 7 [2024-11-23 23:55:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:55:52,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769116619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:55:52,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:55:52,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 17 [2024-11-23 23:55:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6520532] [2024-11-23 23:55:52,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:55:52,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:55:52,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:55:52,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:55:52,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:55:52,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 61 [2024-11-23 23:55:52,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 115 transitions, 692 flow. Second operand has 18 states, 18 states have (on average 24.333333333333332) internal successors, (438), 18 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:55:52,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:55:52,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 61 [2024-11-23 23:55:52,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand