./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme --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 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:06,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:06,600 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:06,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:06,606 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:06,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:06,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:06,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:06,634 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:06,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:06,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:06,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:06,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:06,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:06,638 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:06,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:06,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:06,640 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:06,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:06,641 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:06,642 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:06,642 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:06,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:06,643 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:06,644 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:06,644 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:06,644 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:06,645 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:06,646 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:06,646 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:06,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:06,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:06,648 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:06,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:06,649 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:06,649 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:06,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:06,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:06,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:06,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:06,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:06,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:06,651 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6aeaf730cbe4eb831d189bfd9925d1660c7714b9e685f389bc2495c0943d6472 [2023-11-26 11:55:06,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:07,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:07,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:07,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:07,026 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:07,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-26 11:55:10,134 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:10,399 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:10,400 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-26 11:55:10,424 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/data/3d2a3aeca/0002a14c82ec4d04a08982c2d5a75bb5/FLAG7cbb958d0 [2023-11-26 11:55:10,449 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/data/3d2a3aeca/0002a14c82ec4d04a08982c2d5a75bb5 [2023-11-26 11:55:10,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:10,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:10,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:10,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:10,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:10,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:10" (1/1) ... [2023-11-26 11:55:10,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c713a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:10, skipping insertion in model container [2023-11-26 11:55:10,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:10" (1/1) ... [2023-11-26 11:55:10,544 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:10,801 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2023-11-26 11:55:10,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:10,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:10,991 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/sv-benchmarks/c/goblint-regression/13-privatized_68-pfscan_protected_loop_minimal_interval_true.i[1115,1128] [2023-11-26 11:55:11,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:11,092 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:11,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11 WrapperNode [2023-11-26 11:55:11,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:11,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:11,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:11,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:11,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,182 INFO L138 Inliner]: procedures = 166, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2023-11-26 11:55:11,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:11,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:11,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:11,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:11,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,235 INFO L175 MemorySlicer]: Split 19 memory accesses to 3 slices as follows [2, 1, 16]. 84 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 1, 3]. [2023-11-26 11:55:11,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,272 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,278 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,281 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:11,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:11,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:11,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:11,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:11,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:11,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:55:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:55:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:55:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure worker [2023-11-26 11:55:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure worker [2023-11-26 11:55:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:55:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:55:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:55:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:55:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:55:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:55:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:55:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:55:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:55:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:11,383 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:55:11,540 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:11,542 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:11,827 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:12,132 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:12,133 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:55:12,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:12 BoogieIcfgContainer [2023-11-26 11:55:12,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:12,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:12,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:12,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:12,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:10" (1/3) ... [2023-11-26 11:55:12,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4f6c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:12, skipping insertion in model container [2023-11-26 11:55:12,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (2/3) ... [2023-11-26 11:55:12,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4f6c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:12, skipping insertion in model container [2023-11-26 11:55:12,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:12" (3/3) ... [2023-11-26 11:55:12,146 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_68-pfscan_protected_loop_minimal_interval_true.i [2023-11-26 11:55:12,158 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:55:12,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:12,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 11:55:12,171 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:55:12,240 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-26 11:55:12,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 37 transitions, 78 flow [2023-11-26 11:55:12,327 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-26 11:55:12,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:55:12,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2023-11-26 11:55:12,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 37 transitions, 78 flow [2023-11-26 11:55:12,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 36 transitions, 75 flow [2023-11-26 11:55:12,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:12,364 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1c429bc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:12,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-26 11:55:12,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:55:12,379 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-11-26 11:55:12,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:55:12,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:12,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:12,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:12,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash -340334647, now seen corresponding path program 1 times [2023-11-26 11:55:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:12,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101731952] [2023-11-26 11:55:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:13,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:13,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101731952] [2023-11-26 11:55:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101731952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:13,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991619021] [2023-11-26 11:55:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:13,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-26 11:55:13,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:13,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:13,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-26 11:55:13,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:13,657 INFO L124 PetriNetUnfolderBase]: 218/450 cut-off events. [2023-11-26 11:55:13,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:55:13,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 450 events. 218/450 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1933 event pairs, 20 based on Foata normal form. 37/406 useless extension candidates. Maximal degree in co-relation 851. Up to 241 conditions per place. [2023-11-26 11:55:13,669 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 47 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2023-11-26 11:55:13,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 69 transitions, 265 flow [2023-11-26 11:55:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2023-11-26 11:55:13,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536036036036036 [2023-11-26 11:55:13,691 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 119 transitions. [2023-11-26 11:55:13,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 119 transitions. [2023-11-26 11:55:13,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:13,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 119 transitions. [2023-11-26 11:55:13,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:13,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:13,711 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:13,713 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 75 flow. Second operand 6 states and 119 transitions. [2023-11-26 11:55:13,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 69 transitions, 265 flow [2023-11-26 11:55:13,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 69 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:13,727 INFO L231 Difference]: Finished difference. Result has 41 places, 44 transitions, 168 flow [2023-11-26 11:55:13,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=41, PETRI_TRANSITIONS=44} [2023-11-26 11:55:13,738 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-11-26 11:55:13,739 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 44 transitions, 168 flow [2023-11-26 11:55:13,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:13,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:13,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:13,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:55:13,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:13,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1960469910, now seen corresponding path program 1 times [2023-11-26 11:55:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:13,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649564578] [2023-11-26 11:55:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:13,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:13,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649564578] [2023-11-26 11:55:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649564578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:13,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:13,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:55:13,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093675681] [2023-11-26 11:55:13,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:13,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:13,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-26 11:55:13,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:13,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:13,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-26 11:55:13,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:14,325 INFO L124 PetriNetUnfolderBase]: 278/559 cut-off events. [2023-11-26 11:55:14,325 INFO L125 PetriNetUnfolderBase]: For 184/186 co-relation queries the response was YES. [2023-11-26 11:55:14,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 559 events. 278/559 cut-off events. For 184/186 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2458 event pairs, 60 based on Foata normal form. 20/538 useless extension candidates. Maximal degree in co-relation 1382. Up to 303 conditions per place. [2023-11-26 11:55:14,337 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 58 selfloop transitions, 25 changer transitions 0/89 dead transitions. [2023-11-26 11:55:14,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 474 flow [2023-11-26 11:55:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2023-11-26 11:55:14,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2023-11-26 11:55:14,345 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 108 transitions. [2023-11-26 11:55:14,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 108 transitions. [2023-11-26 11:55:14,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:14,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 108 transitions. [2023-11-26 11:55:14,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,354 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,354 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 168 flow. Second operand 6 states and 108 transitions. [2023-11-26 11:55:14,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 474 flow [2023-11-26 11:55:14,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:55:14,368 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 366 flow [2023-11-26 11:55:14,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-11-26 11:55:14,369 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-26 11:55:14,370 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 366 flow [2023-11-26 11:55:14,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:14,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:14,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:55:14,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:14,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1896296725, now seen corresponding path program 1 times [2023-11-26 11:55:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662585559] [2023-11-26 11:55:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:14,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662585559] [2023-11-26 11:55:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662585559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:14,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:14,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:55:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137905104] [2023-11-26 11:55:14,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:14,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-26 11:55:14,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:14,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:14,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-26 11:55:14,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:15,189 INFO L124 PetriNetUnfolderBase]: 399/859 cut-off events. [2023-11-26 11:55:15,189 INFO L125 PetriNetUnfolderBase]: For 1245/1262 co-relation queries the response was YES. [2023-11-26 11:55:15,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 859 events. 399/859 cut-off events. For 1245/1262 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4767 event pairs, 86 based on Foata normal form. 16/819 useless extension candidates. Maximal degree in co-relation 2722. Up to 360 conditions per place. [2023-11-26 11:55:15,201 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 87 selfloop transitions, 27 changer transitions 0/127 dead transitions. [2023-11-26 11:55:15,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 127 transitions, 942 flow [2023-11-26 11:55:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:55:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2023-11-26 11:55:15,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138996138996139 [2023-11-26 11:55:15,204 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 159 transitions. [2023-11-26 11:55:15,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 159 transitions. [2023-11-26 11:55:15,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:15,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 159 transitions. [2023-11-26 11:55:15,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:15,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:15,208 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:15,209 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 366 flow. Second operand 7 states and 159 transitions. [2023-11-26 11:55:15,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 127 transitions, 942 flow [2023-11-26 11:55:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 127 transitions, 942 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:55:15,227 INFO L231 Difference]: Finished difference. Result has 60 places, 76 transitions, 588 flow [2023-11-26 11:55:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2023-11-26 11:55:15,228 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-11-26 11:55:15,229 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 588 flow [2023-11-26 11:55:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:15,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:15,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:15,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:55:15,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:15,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash 44192555, now seen corresponding path program 2 times [2023-11-26 11:55:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:15,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852499180] [2023-11-26 11:55:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:15,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:15,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852499180] [2023-11-26 11:55:15,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852499180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:15,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:15,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:55:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232112631] [2023-11-26 11:55:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:55:15,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:15,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:55:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:15,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-26 11:55:15,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:15,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:15,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-26 11:55:15,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:16,487 INFO L124 PetriNetUnfolderBase]: 468/945 cut-off events. [2023-11-26 11:55:16,487 INFO L125 PetriNetUnfolderBase]: For 1990/2021 co-relation queries the response was YES. [2023-11-26 11:55:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 945 events. 468/945 cut-off events. For 1990/2021 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4973 event pairs, 104 based on Foata normal form. 32/971 useless extension candidates. Maximal degree in co-relation 3443. Up to 583 conditions per place. [2023-11-26 11:55:16,500 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 67 selfloop transitions, 61 changer transitions 0/136 dead transitions. [2023-11-26 11:55:16,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 136 transitions, 1241 flow [2023-11-26 11:55:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:55:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:55:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 196 transitions. [2023-11-26 11:55:16,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074844074844075 [2023-11-26 11:55:16,504 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 196 transitions. [2023-11-26 11:55:16,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 196 transitions. [2023-11-26 11:55:16,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:16,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 196 transitions. [2023-11-26 11:55:16,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.076923076923077) internal successors, (196), 13 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:16,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:16,510 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:16,511 INFO L175 Difference]: Start difference. First operand has 60 places, 76 transitions, 588 flow. Second operand 13 states and 196 transitions. [2023-11-26 11:55:16,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 136 transitions, 1241 flow [2023-11-26 11:55:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 136 transitions, 1205 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:16,527 INFO L231 Difference]: Finished difference. Result has 73 places, 108 transitions, 999 flow [2023-11-26 11:55:16,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=999, PETRI_PLACES=73, PETRI_TRANSITIONS=108} [2023-11-26 11:55:16,529 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2023-11-26 11:55:16,530 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 108 transitions, 999 flow [2023-11-26 11:55:16,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:16,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:16,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:16,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:55:16,531 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:16,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:16,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1880162957, now seen corresponding path program 3 times [2023-11-26 11:55:16,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678065000] [2023-11-26 11:55:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:16,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678065000] [2023-11-26 11:55:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678065000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:16,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:55:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415322280] [2023-11-26 11:55:16,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:16,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:16,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:16,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:16,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-26 11:55:16,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 108 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:16,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:16,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-26 11:55:16,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:17,344 INFO L124 PetriNetUnfolderBase]: 662/1433 cut-off events. [2023-11-26 11:55:17,344 INFO L125 PetriNetUnfolderBase]: For 3699/3724 co-relation queries the response was YES. [2023-11-26 11:55:17,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 1433 events. 662/1433 cut-off events. For 3699/3724 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8176 event pairs, 143 based on Foata normal form. 16/1447 useless extension candidates. Maximal degree in co-relation 5488. Up to 530 conditions per place. [2023-11-26 11:55:17,365 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 128 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2023-11-26 11:55:17,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 186 transitions, 1809 flow [2023-11-26 11:55:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:55:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2023-11-26 11:55:17,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2023-11-26 11:55:17,367 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 168 transitions. [2023-11-26 11:55:17,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 168 transitions. [2023-11-26 11:55:17,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:17,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 168 transitions. [2023-11-26 11:55:17,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,369 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,370 INFO L175 Difference]: Start difference. First operand has 73 places, 108 transitions, 999 flow. Second operand 7 states and 168 transitions. [2023-11-26 11:55:17,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 186 transitions, 1809 flow [2023-11-26 11:55:17,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 186 transitions, 1737 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-26 11:55:17,396 INFO L231 Difference]: Finished difference. Result has 79 places, 118 transitions, 1153 flow [2023-11-26 11:55:17,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1153, PETRI_PLACES=79, PETRI_TRANSITIONS=118} [2023-11-26 11:55:17,400 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2023-11-26 11:55:17,400 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 118 transitions, 1153 flow [2023-11-26 11:55:17,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:17,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:17,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:55:17,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:17,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash 445304631, now seen corresponding path program 4 times [2023-11-26 11:55:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:17,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611877592] [2023-11-26 11:55:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:17,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:17,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611877592] [2023-11-26 11:55:17,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611877592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:17,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:17,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:55:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394749320] [2023-11-26 11:55:17,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:17,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:17,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:17,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-26 11:55:17,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 118 transitions, 1153 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:17,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:17,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-26 11:55:17,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:18,325 INFO L124 PetriNetUnfolderBase]: 658/1430 cut-off events. [2023-11-26 11:55:18,325 INFO L125 PetriNetUnfolderBase]: For 4742/4763 co-relation queries the response was YES. [2023-11-26 11:55:18,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5804 conditions, 1430 events. 658/1430 cut-off events. For 4742/4763 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8199 event pairs, 192 based on Foata normal form. 16/1444 useless extension candidates. Maximal degree in co-relation 5772. Up to 789 conditions per place. [2023-11-26 11:55:18,345 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 124 selfloop transitions, 42 changer transitions 0/181 dead transitions. [2023-11-26 11:55:18,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 181 transitions, 1890 flow [2023-11-26 11:55:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:55:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:55:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2023-11-26 11:55:18,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640926640926641 [2023-11-26 11:55:18,347 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 166 transitions. [2023-11-26 11:55:18,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 166 transitions. [2023-11-26 11:55:18,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:18,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 166 transitions. [2023-11-26 11:55:18,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:18,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:18,350 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 37.0) internal successors, (296), 8 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:18,350 INFO L175 Difference]: Start difference. First operand has 79 places, 118 transitions, 1153 flow. Second operand 7 states and 166 transitions. [2023-11-26 11:55:18,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 181 transitions, 1890 flow [2023-11-26 11:55:18,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 181 transitions, 1832 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:18,375 INFO L231 Difference]: Finished difference. Result has 85 places, 123 transitions, 1266 flow [2023-11-26 11:55:18,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1266, PETRI_PLACES=85, PETRI_TRANSITIONS=123} [2023-11-26 11:55:18,379 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-11-26 11:55:18,379 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 123 transitions, 1266 flow [2023-11-26 11:55:18,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:18,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:18,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:18,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:55:18,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:18,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash 825496005, now seen corresponding path program 5 times [2023-11-26 11:55:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552589458] [2023-11-26 11:55:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:18,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552589458] [2023-11-26 11:55:18,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552589458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:18,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:18,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:55:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989373531] [2023-11-26 11:55:18,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:55:18,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:18,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:55:18,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:55:18,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-26 11:55:18,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 123 transitions, 1266 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:18,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:18,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-26 11:55:18,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:19,725 INFO L124 PetriNetUnfolderBase]: 725/1490 cut-off events. [2023-11-26 11:55:19,725 INFO L125 PetriNetUnfolderBase]: For 4593/4595 co-relation queries the response was YES. [2023-11-26 11:55:19,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 1490 events. 725/1490 cut-off events. For 4593/4595 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7854 event pairs, 245 based on Foata normal form. 7/1496 useless extension candidates. Maximal degree in co-relation 6011. Up to 1042 conditions per place. [2023-11-26 11:55:19,747 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 94 selfloop transitions, 54 changer transitions 0/154 dead transitions. [2023-11-26 11:55:19,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 154 transitions, 1644 flow [2023-11-26 11:55:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:55:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:55:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 185 transitions. [2023-11-26 11:55:19,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-11-26 11:55:19,750 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 185 transitions. [2023-11-26 11:55:19,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 185 transitions. [2023-11-26 11:55:19,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:19,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 185 transitions. [2023-11-26 11:55:19,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 14.23076923076923) internal successors, (185), 13 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:19,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:19,759 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 37.0) internal successors, (518), 14 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:19,759 INFO L175 Difference]: Start difference. First operand has 85 places, 123 transitions, 1266 flow. Second operand 13 states and 185 transitions. [2023-11-26 11:55:19,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 154 transitions, 1644 flow [2023-11-26 11:55:19,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1557 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-26 11:55:19,791 INFO L231 Difference]: Finished difference. Result has 99 places, 127 transitions, 1294 flow [2023-11-26 11:55:19,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1294, PETRI_PLACES=99, PETRI_TRANSITIONS=127} [2023-11-26 11:55:19,795 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 66 predicate places. [2023-11-26 11:55:19,796 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 127 transitions, 1294 flow [2023-11-26 11:55:19,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:19,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:19,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:55:19,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:19,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1749611465, now seen corresponding path program 6 times [2023-11-26 11:55:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:19,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141558049] [2023-11-26 11:55:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:20,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:20,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141558049] [2023-11-26 11:55:20,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141558049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:20,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:20,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:55:20,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452415212] [2023-11-26 11:55:20,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:20,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:55:20,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:55:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:20,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-26 11:55:20,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 127 transitions, 1294 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:20,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:20,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-26 11:55:20,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:21,135 INFO L124 PetriNetUnfolderBase]: 727/1504 cut-off events. [2023-11-26 11:55:21,135 INFO L125 PetriNetUnfolderBase]: For 5264/5266 co-relation queries the response was YES. [2023-11-26 11:55:21,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6406 conditions, 1504 events. 727/1504 cut-off events. For 5264/5266 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7989 event pairs, 229 based on Foata normal form. 10/1513 useless extension candidates. Maximal degree in co-relation 6365. Up to 1036 conditions per place. [2023-11-26 11:55:21,160 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 94 selfloop transitions, 63 changer transitions 0/163 dead transitions. [2023-11-26 11:55:21,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 1884 flow [2023-11-26 11:55:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:55:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:55:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2023-11-26 11:55:21,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-11-26 11:55:21,163 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 144 transitions. [2023-11-26 11:55:21,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 144 transitions. [2023-11-26 11:55:21,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:21,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 144 transitions. [2023-11-26 11:55:21,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:21,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:21,166 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:21,166 INFO L175 Difference]: Start difference. First operand has 99 places, 127 transitions, 1294 flow. Second operand 9 states and 144 transitions. [2023-11-26 11:55:21,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 1884 flow [2023-11-26 11:55:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 1828 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:21,209 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1575 flow [2023-11-26 11:55:21,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1575, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2023-11-26 11:55:21,213 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 77 predicate places. [2023-11-26 11:55:21,213 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1575 flow [2023-11-26 11:55:21,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:21,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:21,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:21,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:55:21,214 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:21,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:21,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1793151113, now seen corresponding path program 7 times [2023-11-26 11:55:21,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:21,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278444545] [2023-11-26 11:55:21,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:21,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:21,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278444545] [2023-11-26 11:55:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278444545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:21,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:55:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895069380] [2023-11-26 11:55:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:55:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:55:21,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:55:21,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-26 11:55:21,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:21,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:21,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-26 11:55:21,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:22,292 INFO L124 PetriNetUnfolderBase]: 594/1258 cut-off events. [2023-11-26 11:55:22,292 INFO L125 PetriNetUnfolderBase]: For 4705/4722 co-relation queries the response was YES. [2023-11-26 11:55:22,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5443 conditions, 1258 events. 594/1258 cut-off events. For 4705/4722 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6593 event pairs, 206 based on Foata normal form. 27/1278 useless extension candidates. Maximal degree in co-relation 5396. Up to 876 conditions per place. [2023-11-26 11:55:22,312 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 80 selfloop transitions, 42 changer transitions 5/139 dead transitions. [2023-11-26 11:55:22,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 139 transitions, 1563 flow [2023-11-26 11:55:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:55:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:55:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2023-11-26 11:55:22,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486486486486487 [2023-11-26 11:55:22,314 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 166 transitions. [2023-11-26 11:55:22,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 166 transitions. [2023-11-26 11:55:22,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:22,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 166 transitions. [2023-11-26 11:55:22,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,318 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 37.0) internal successors, (407), 11 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,319 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1575 flow. Second operand 10 states and 166 transitions. [2023-11-26 11:55:22,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 139 transitions, 1563 flow [2023-11-26 11:55:22,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 1459 flow, removed 14 selfloop flow, removed 9 redundant places. [2023-11-26 11:55:22,350 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 1161 flow [2023-11-26 11:55:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1161, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2023-11-26 11:55:22,352 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 78 predicate places. [2023-11-26 11:55:22,353 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 1161 flow [2023-11-26 11:55:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:22,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:22,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:22,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:55:22,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:22,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1262778507, now seen corresponding path program 1 times [2023-11-26 11:55:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:22,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069705125] [2023-11-26 11:55:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:22,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069705125] [2023-11-26 11:55:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069705125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526607379] [2023-11-26 11:55:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:22,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:22,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:23,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 11:55:23,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:23,137 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 11 treesize of output 7 [2023-11-26 11:55:23,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-11-26 11:55:23,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-11-26 11:55:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:23,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:23,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526607379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:23,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:23,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-11-26 11:55:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252799379] [2023-11-26 11:55:23,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:55:23,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:55:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:55:24,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2023-11-26 11:55:24,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 1161 flow. Second operand has 22 states, 22 states have (on average 10.090909090909092) internal successors, (222), 22 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:24,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:24,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2023-11-26 11:55:24,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:29,557 INFO L124 PetriNetUnfolderBase]: 4052/8075 cut-off events. [2023-11-26 11:55:29,558 INFO L125 PetriNetUnfolderBase]: For 31253/31614 co-relation queries the response was YES. [2023-11-26 11:55:29,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33686 conditions, 8075 events. 4052/8075 cut-off events. For 31253/31614 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 59403 event pairs, 571 based on Foata normal form. 529/8573 useless extension candidates. Maximal degree in co-relation 33641. Up to 1352 conditions per place. [2023-11-26 11:55:29,689 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 487 selfloop transitions, 488 changer transitions 0/987 dead transitions. [2023-11-26 11:55:29,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 987 transitions, 9824 flow [2023-11-26 11:55:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-26 11:55:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-26 11:55:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1146 transitions. [2023-11-26 11:55:29,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4839527027027027 [2023-11-26 11:55:29,701 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 1146 transitions. [2023-11-26 11:55:29,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 1146 transitions. [2023-11-26 11:55:29,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:29,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 1146 transitions. [2023-11-26 11:55:29,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 17.90625) internal successors, (1146), 64 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:29,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 37.0) internal successors, (2405), 65 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:29,726 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 37.0) internal successors, (2405), 65 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:29,726 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 1161 flow. Second operand 64 states and 1146 transitions. [2023-11-26 11:55:29,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 987 transitions, 9824 flow [2023-11-26 11:55:29,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 987 transitions, 9384 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-11-26 11:55:29,898 INFO L231 Difference]: Finished difference. Result has 199 places, 615 transitions, 7300 flow [2023-11-26 11:55:29,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=7300, PETRI_PLACES=199, PETRI_TRANSITIONS=615} [2023-11-26 11:55:29,902 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 166 predicate places. [2023-11-26 11:55:29,903 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 615 transitions, 7300 flow [2023-11-26 11:55:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.090909090909092) internal successors, (222), 22 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:29,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:29,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:29,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:30,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:30,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:30,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1849448347, now seen corresponding path program 1 times [2023-11-26 11:55:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:30,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357926548] [2023-11-26 11:55:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:30,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:30,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:30,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357926548] [2023-11-26 11:55:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357926548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:30,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:55:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301701646] [2023-11-26 11:55:30,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:30,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:55:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:30,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:55:30,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:55:30,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2023-11-26 11:55:30,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 615 transitions, 7300 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:30,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:30,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2023-11-26 11:55:30,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:34,005 INFO L124 PetriNetUnfolderBase]: 3776/7795 cut-off events. [2023-11-26 11:55:34,006 INFO L125 PetriNetUnfolderBase]: For 122835/122899 co-relation queries the response was YES. [2023-11-26 11:55:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45714 conditions, 7795 events. 3776/7795 cut-off events. For 122835/122899 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 59221 event pairs, 1628 based on Foata normal form. 10/7779 useless extension candidates. Maximal degree in co-relation 45634. Up to 6725 conditions per place. [2023-11-26 11:55:34,127 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 496 selfloop transitions, 8 changer transitions 22/603 dead transitions. [2023-11-26 11:55:34,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 603 transitions, 8110 flow [2023-11-26 11:55:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:55:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:55:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-26 11:55:34,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135135135135135 [2023-11-26 11:55:34,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-26 11:55:34,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-26 11:55:34,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:34,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-26 11:55:34,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,131 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 37.0) internal successors, (222), 6 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,132 INFO L175 Difference]: Start difference. First operand has 199 places, 615 transitions, 7300 flow. Second operand 5 states and 95 transitions. [2023-11-26 11:55:34,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 603 transitions, 8110 flow [2023-11-26 11:55:34,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 603 transitions, 7562 flow, removed 274 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:34,844 INFO L231 Difference]: Finished difference. Result has 204 places, 580 transitions, 6295 flow [2023-11-26 11:55:34,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6473, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6295, PETRI_PLACES=204, PETRI_TRANSITIONS=580} [2023-11-26 11:55:34,845 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 171 predicate places. [2023-11-26 11:55:34,846 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 580 transitions, 6295 flow [2023-11-26 11:55:34,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:34,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:34,851 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:34,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:55:34,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:34,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1733082620, now seen corresponding path program 2 times [2023-11-26 11:55:34,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211342080] [2023-11-26 11:55:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:35,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:35,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211342080] [2023-11-26 11:55:35,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211342080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:35,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517368370] [2023-11-26 11:55:35,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:55:35,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:35,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:35,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:35,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:35,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:55:35,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:35,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:55:35,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:36,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 16 [2023-11-26 11:55:36,095 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 15 treesize of output 7 [2023-11-26 11:55:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:55:36,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:36,297 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-26 11:55:36,297 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 41 treesize of output 1 [2023-11-26 11:55:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:55:36,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517368370] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:36,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:36,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 23 [2023-11-26 11:55:36,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816871001] [2023-11-26 11:55:36,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:36,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:36,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:55:36,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-26 11:55:36,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 580 transitions, 6295 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:36,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:36,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-26 11:55:36,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:41,262 INFO L124 PetriNetUnfolderBase]: 6656/12982 cut-off events. [2023-11-26 11:55:41,262 INFO L125 PetriNetUnfolderBase]: For 204345/204381 co-relation queries the response was YES. [2023-11-26 11:55:41,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73844 conditions, 12982 events. 6656/12982 cut-off events. For 204345/204381 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 102217 event pairs, 705 based on Foata normal form. 72/13051 useless extension candidates. Maximal degree in co-relation 73761. Up to 6569 conditions per place. [2023-11-26 11:55:41,432 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 568 selfloop transitions, 577 changer transitions 0/1151 dead transitions. [2023-11-26 11:55:41,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 1151 transitions, 14423 flow [2023-11-26 11:55:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:55:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 11:55:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2023-11-26 11:55:41,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46283783783783783 [2023-11-26 11:55:41,434 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 137 transitions. [2023-11-26 11:55:41,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 137 transitions. [2023-11-26 11:55:41,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:41,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 137 transitions. [2023-11-26 11:55:41,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,437 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 37.0) internal successors, (333), 9 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:41,437 INFO L175 Difference]: Start difference. First operand has 204 places, 580 transitions, 6295 flow. Second operand 8 states and 137 transitions. [2023-11-26 11:55:41,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 1151 transitions, 14423 flow [2023-11-26 11:55:42,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1151 transitions, 14075 flow, removed 21 selfloop flow, removed 22 redundant places. [2023-11-26 11:55:42,569 INFO L231 Difference]: Finished difference. Result has 186 places, 993 transitions, 12928 flow [2023-11-26 11:55:42,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12928, PETRI_PLACES=186, PETRI_TRANSITIONS=993} [2023-11-26 11:55:42,570 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 153 predicate places. [2023-11-26 11:55:42,570 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 993 transitions, 12928 flow [2023-11-26 11:55:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:42,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:42,570 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:42,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:55:42,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:55:42,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting workerErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:42,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1725039050, now seen corresponding path program 3 times [2023-11-26 11:55:42,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:42,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293768331] [2023-11-26 11:55:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:42,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:43,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293768331] [2023-11-26 11:55:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293768331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:43,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943762347] [2023-11-26 11:55:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:55:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:43,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:43,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:43,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-26 11:55:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:55:43,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-26 11:55:43,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:43,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 16 [2023-11-26 11:55:43,943 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 15 treesize of output 7 [2023-11-26 11:55:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:55:43,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:44,114 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-26 11:55:44,117 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 41 treesize of output 1 [2023-11-26 11:55:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 11:55:44,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943762347] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:44,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:55:44,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 23 [2023-11-26 11:55:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673423307] [2023-11-26 11:55:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:44,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:55:44,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:44,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:55:44,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:55:44,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-26 11:55:44,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 993 transitions, 12928 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:44,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:44,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-26 11:55:44,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:55:49,794 INFO L124 PetriNetUnfolderBase]: 6610/12997 cut-off events. [2023-11-26 11:55:49,795 INFO L125 PetriNetUnfolderBase]: For 239749/239789 co-relation queries the response was YES. [2023-11-26 11:55:49,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82347 conditions, 12997 events. 6610/12997 cut-off events. For 239749/239789 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 102536 event pairs, 967 based on Foata normal form. 59/13005 useless extension candidates. Maximal degree in co-relation 82274. Up to 4964 conditions per place. [2023-11-26 11:55:50,015 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 577 selfloop transitions, 573 changer transitions 0/1155 dead transitions. [2023-11-26 11:55:50,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1155 transitions, 16727 flow [2023-11-26 11:55:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:55:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:55:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-26 11:55:50,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189189189189189 [2023-11-26 11:55:50,017 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-26 11:55:50,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-26 11:55:50,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:55:50,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-26 11:55:50,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:50,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:50,020 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 37.0) internal successors, (259), 7 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:50,020 INFO L175 Difference]: Start difference. First operand has 186 places, 993 transitions, 12928 flow. Second operand 6 states and 93 transitions. [2023-11-26 11:55:50,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1155 transitions, 16727 flow [2023-11-26 11:55:52,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 1155 transitions, 16202 flow, removed 135 selfloop flow, removed 2 redundant places. [2023-11-26 11:55:52,085 INFO L231 Difference]: Finished difference. Result has 188 places, 1003 transitions, 14242 flow [2023-11-26 11:55:52,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12393, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14242, PETRI_PLACES=188, PETRI_TRANSITIONS=1003} [2023-11-26 11:55:52,087 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 155 predicate places. [2023-11-26 11:55:52,087 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 1003 transitions, 14242 flow [2023-11-26 11:55:52,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:52,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:52,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:52,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:52,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:52,294 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting workerErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, workerErr0ASSERT_VIOLATIONERROR_FUNCTION, workerErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-26 11:55:52,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash 995624159, now seen corresponding path program 1 times [2023-11-26 11:55:52,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:52,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707632943] [2023-11-26 11:55:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:52,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707632943] [2023-11-26 11:55:52,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707632943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:55:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953490226] [2023-11-26 11:55:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:52,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:52,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:52,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3517dc5b-22d3-45af-8051-5a23f59d0467/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:52,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-26 11:55:52,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:52,811 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 11 treesize of output 7 [2023-11-26 11:55:52,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-11-26 11:55:53,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2023-11-26 11:55:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:55:53,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:55:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:53,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953490226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:55:53,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:55:53,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10] total 20 [2023-11-26 11:55:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931940801] [2023-11-26 11:55:53,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:55:53,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 11:55:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 11:55:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:55:53,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2023-11-26 11:55:53,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 1003 transitions, 14242 flow. Second operand has 21 states, 21 states have (on average 9.714285714285714) internal successors, (204), 21 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:55:53,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:53,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2023-11-26 11:55:53,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand