./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 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_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:28:38,136 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:28:38,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:28:38,214 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:28:38,215 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:28:38,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:28:38,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:28:38,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:28:38,244 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:28:38,244 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:28:38,245 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:28:38,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:28:38,247 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:28:38,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:28:38,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:28:38,249 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:28:38,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:28:38,250 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:28:38,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:28:38,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:28:38,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:28:38,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:28:38,253 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:28:38,254 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:28:38,254 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:28:38,255 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:28:38,255 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:28:38,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:28:38,256 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:28:38,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:28:38,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:38,258 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:28:38,258 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:28:38,259 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:28:38,259 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:28:38,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:28:38,260 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:28:38,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:28:38,261 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:28:38,262 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:28:38,262 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:28:38,263 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_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 [2023-11-12 02:28:38,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:28:38,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:28:38,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:28:38,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:28:38,600 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:28:38,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-12 02:28:41,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:28:42,113 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:28:42,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-12 02:28:42,122 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/data/12e6d1437/a8280aa4a6eb43cabf8e2a13bbcf713e/FLAG218f653a2 [2023-11-12 02:28:42,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/data/12e6d1437/a8280aa4a6eb43cabf8e2a13bbcf713e [2023-11-12 02:28:42,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:28:42,150 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:28:42,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:42,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:28:42,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:28:42,162 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bff3aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42, skipping insertion in model container [2023-11-12 02:28:42,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:28:42,381 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:42,397 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:28:42,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:28:42,440 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:42,440 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:28:42,449 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:28:42,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42 WrapperNode [2023-11-12 02:28:42,450 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:28:42,451 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:42,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:28:42,452 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:28:42,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,498 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 135 [2023-11-12 02:28:42,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:28:42,505 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:28:42,505 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:28:42,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:28:42,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,525 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,532 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:28:42,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:28:42,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:28:42,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:28:42,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (1/1) ... [2023-11-12 02:28:42,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:28:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:28:42,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:28:42,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:28:42,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:28:42,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:28:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:28:42,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:28:42,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:28:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:28:42,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:28:42,663 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-12 02:28:42,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-12 02:28:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:28:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:28:42,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:28:42,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:28:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:28:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:28:42,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:28:42,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:28:42,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:28:42,671 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:28:42,898 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:28:42,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:28:43,283 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:28:43,512 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:28:43,513 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:28:43,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:43 BoogieIcfgContainer [2023-11-12 02:28:43,516 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:28:43,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:28:43,525 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:28:43,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:28:43,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:28:42" (1/3) ... [2023-11-12 02:28:43,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f43af80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:43, skipping insertion in model container [2023-11-12 02:28:43,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:28:42" (2/3) ... [2023-11-12 02:28:43,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f43af80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:28:43, skipping insertion in model container [2023-11-12 02:28:43,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:28:43" (3/3) ... [2023-11-12 02:28:43,538 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-11-12 02:28:43,550 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:28:43,564 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:28:43,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-12 02:28:43,565 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:28:43,757 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:28:43,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 160 transitions, 348 flow [2023-11-12 02:28:43,953 INFO L124 PetriNetUnfolderBase]: 9/156 cut-off events. [2023-11-12 02:28:43,953 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:28:43,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 156 events. 9/156 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-12 02:28:43,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 160 transitions, 348 flow [2023-11-12 02:28:43,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 130 transitions, 281 flow [2023-11-12 02:28:43,972 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:43,983 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 130 transitions, 281 flow [2023-11-12 02:28:43,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 130 transitions, 281 flow [2023-11-12 02:28:43,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 130 transitions, 281 flow [2023-11-12 02:28:44,025 INFO L124 PetriNetUnfolderBase]: 8/130 cut-off events. [2023-11-12 02:28:44,026 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:28:44,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 130 events. 8/130 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 213 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-11-12 02:28:44,034 INFO L119 LiptonReduction]: Number of co-enabled transitions 6264 [2023-11-12 02:28:49,905 INFO L134 LiptonReduction]: Checked pairs total: 6663 [2023-11-12 02:28:49,905 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-12 02:28:49,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:49,929 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;@40508cb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:49,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-12 02:28:49,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:49,933 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-12 02:28:49,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:49,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:49,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:28:49,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:28:49,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 20257425, now seen corresponding path program 1 times [2023-11-12 02:28:49,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:49,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840403153] [2023-11-12 02:28:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840403153] [2023-11-12 02:28:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840403153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:50,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:50,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:28:50,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350034902] [2023-11-12 02:28:50,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:50,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 273 [2023-11-12 02:28:50,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:50,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:50,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 273 [2023-11-12 02:28:50,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:53,806 INFO L124 PetriNetUnfolderBase]: 18167/23634 cut-off events. [2023-11-12 02:28:53,806 INFO L125 PetriNetUnfolderBase]: For 1249/1249 co-relation queries the response was YES. [2023-11-12 02:28:53,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48488 conditions, 23634 events. 18167/23634 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 120849 event pairs, 4111 based on Foata normal form. 0/10020 useless extension candidates. Maximal degree in co-relation 41018. Up to 19063 conditions per place. [2023-11-12 02:28:54,043 INFO L140 encePairwiseOnDemand]: 261/273 looper letters, 69 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-11-12 02:28:54,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 331 flow [2023-11-12 02:28:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-11-12 02:28:54,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885225885225885 [2023-11-12 02:28:54,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-11-12 02:28:54,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-11-12 02:28:54,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:54,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-11-12 02:28:54,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:54,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:54,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:54,102 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 107 flow. Second operand 3 states and 482 transitions. [2023-11-12 02:28:54,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 331 flow [2023-11-12 02:28:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 73 transitions, 307 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-12 02:28:54,145 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 126 flow [2023-11-12 02:28:54,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-11-12 02:28:54,152 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-11-12 02:28:54,152 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 126 flow [2023-11-12 02:28:54,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:54,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:54,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:28:54,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:28:54,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:28:54,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:54,155 INFO L85 PathProgramCache]: Analyzing trace with hash 20257507, now seen corresponding path program 1 times [2023-11-12 02:28:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260436200] [2023-11-12 02:28:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:54,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260436200] [2023-11-12 02:28:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260436200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:54,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:54,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:54,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453871278] [2023-11-12 02:28:54,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:54,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:54,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2023-11-12 02:28:54,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:54,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:54,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2023-11-12 02:28:54,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:57,088 INFO L124 PetriNetUnfolderBase]: 17563/23030 cut-off events. [2023-11-12 02:28:57,088 INFO L125 PetriNetUnfolderBase]: For 1507/1507 co-relation queries the response was YES. [2023-11-12 02:28:57,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53100 conditions, 23030 events. 17563/23030 cut-off events. For 1507/1507 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 111729 event pairs, 13889 based on Foata normal form. 0/11608 useless extension candidates. Maximal degree in co-relation 42604. Up to 21807 conditions per place. [2023-11-12 02:28:57,353 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 62 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-11-12 02:28:57,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 296 flow [2023-11-12 02:28:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-11-12 02:28:57,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616605616605617 [2023-11-12 02:28:57,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-11-12 02:28:57,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-11-12 02:28:57,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:57,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-11-12 02:28:57,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:57,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:57,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:57,372 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 126 flow. Second operand 3 states and 460 transitions. [2023-11-12 02:28:57,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 296 flow [2023-11-12 02:28:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:28:57,384 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 127 flow [2023-11-12 02:28:57,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-11-12 02:28:57,385 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-11-12 02:28:57,386 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 127 flow [2023-11-12 02:28:57,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:57,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:57,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:28:57,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:28:57,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:28:57,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:57,391 INFO L85 PathProgramCache]: Analyzing trace with hash 627983305, now seen corresponding path program 1 times [2023-11-12 02:28:57,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:57,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151983507] [2023-11-12 02:28:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:57,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151983507] [2023-11-12 02:28:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151983507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:57,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:57,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981294901] [2023-11-12 02:28:57,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:57,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:57,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2023-11-12 02:28:57,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:57,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:57,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2023-11-12 02:28:57,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:59,639 INFO L124 PetriNetUnfolderBase]: 15521/20386 cut-off events. [2023-11-12 02:28:59,640 INFO L125 PetriNetUnfolderBase]: For 1638/1638 co-relation queries the response was YES. [2023-11-12 02:28:59,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48530 conditions, 20386 events. 15521/20386 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 103163 event pairs, 5667 based on Foata normal form. 0/10622 useless extension candidates. Maximal degree in co-relation 15984. Up to 12102 conditions per place. [2023-11-12 02:28:59,814 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 65 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-12 02:28:59,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 323 flow [2023-11-12 02:28:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-11-12 02:28:59,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616605616605617 [2023-11-12 02:28:59,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-11-12 02:28:59,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-11-12 02:28:59,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:59,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-11-12 02:28:59,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:59,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:59,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:59,828 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 127 flow. Second operand 3 states and 460 transitions. [2023-11-12 02:28:59,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 323 flow [2023-11-12 02:28:59,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 316 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-12 02:28:59,881 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 122 flow [2023-11-12 02:28:59,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-12 02:28:59,884 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-11-12 02:28:59,884 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 122 flow [2023-11-12 02:28:59,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:59,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:59,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:28:59,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:28:59,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:28:59,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash 627983306, now seen corresponding path program 1 times [2023-11-12 02:28:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:59,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889713025] [2023-11-12 02:28:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:59,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:00,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889713025] [2023-11-12 02:29:00,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889713025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:00,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476577137] [2023-11-12 02:29:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:00,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:00,058 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:00,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:29:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:00,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:29:00,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:00,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:00,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476577137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:00,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:29:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680595166] [2023-11-12 02:29:00,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:00,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:00,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2023-11-12 02:29:00,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 122 flow. Second operand has 7 states, 7 states have (on average 132.42857142857142) internal successors, (927), 7 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:00,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:00,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2023-11-12 02:29:00,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:04,607 INFO L124 PetriNetUnfolderBase]: 35705/45988 cut-off events. [2023-11-12 02:29:04,607 INFO L125 PetriNetUnfolderBase]: For 6511/6511 co-relation queries the response was YES. [2023-11-12 02:29:04,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113482 conditions, 45988 events. 35705/45988 cut-off events. For 6511/6511 co-relation queries the response was YES. Maximal size of possible extension queue 1935. Compared 243962 event pairs, 11263 based on Foata normal form. 0/23108 useless extension candidates. Maximal degree in co-relation 35064. Up to 21269 conditions per place. [2023-11-12 02:29:04,922 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 145 selfloop transitions, 9 changer transitions 0/154 dead transitions. [2023-11-12 02:29:04,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 154 transitions, 724 flow [2023-11-12 02:29:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:29:04,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:29:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 943 transitions. [2023-11-12 02:29:04,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757020757020757 [2023-11-12 02:29:04,937 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 943 transitions. [2023-11-12 02:29:04,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 943 transitions. [2023-11-12 02:29:04,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:04,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 943 transitions. [2023-11-12 02:29:04,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.16666666666666) internal successors, (943), 6 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:04,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:04,949 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 273.0) internal successors, (1911), 7 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:04,949 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 122 flow. Second operand 6 states and 943 transitions. [2023-11-12 02:29:04,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 154 transitions, 724 flow [2023-11-12 02:29:04,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 154 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:29:04,980 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 177 flow [2023-11-12 02:29:04,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-11-12 02:29:04,986 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-11-12 02:29:04,986 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 177 flow [2023-11-12 02:29:04,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.42857142857142) internal successors, (927), 7 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:04,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:04,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:05,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:05,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:05,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:29:05,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash 627983224, now seen corresponding path program 1 times [2023-11-12 02:29:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:05,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330282704] [2023-11-12 02:29:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:05,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330282704] [2023-11-12 02:29:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330282704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:29:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262268532] [2023-11-12 02:29:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:05,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:29:05,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:29:05,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:29:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:05,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:29:05,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:29:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:05,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:29:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:05,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262268532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:29:05,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:29:05,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 02:29:05,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593219949] [2023-11-12 02:29:05,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:29:05,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:29:05,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:29:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:29:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 273 [2023-11-12 02:29:05,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 177 flow. Second operand has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:05,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:05,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 273 [2023-11-12 02:29:05,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:12,012 INFO L124 PetriNetUnfolderBase]: 58235/75198 cut-off events. [2023-11-12 02:29:12,012 INFO L125 PetriNetUnfolderBase]: For 28823/28823 co-relation queries the response was YES. [2023-11-12 02:29:12,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206288 conditions, 75198 events. 58235/75198 cut-off events. For 28823/28823 co-relation queries the response was YES. Maximal size of possible extension queue 2637. Compared 412484 event pairs, 9603 based on Foata normal form. 2684/50692 useless extension candidates. Maximal degree in co-relation 70344. Up to 20515 conditions per place. [2023-11-12 02:29:12,476 INFO L140 encePairwiseOnDemand]: 264/273 looper letters, 189 selfloop transitions, 29 changer transitions 0/218 dead transitions. [2023-11-12 02:29:12,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 218 transitions, 1136 flow [2023-11-12 02:29:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:29:12,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:29:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1145 transitions. [2023-11-12 02:29:12,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5991627420198848 [2023-11-12 02:29:12,483 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1145 transitions. [2023-11-12 02:29:12,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1145 transitions. [2023-11-12 02:29:12,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:12,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1145 transitions. [2023-11-12 02:29:12,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.57142857142858) internal successors, (1145), 7 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:12,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:12,496 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 273.0) internal successors, (2184), 8 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:12,496 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 177 flow. Second operand 7 states and 1145 transitions. [2023-11-12 02:29:12,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 218 transitions, 1136 flow [2023-11-12 02:29:14,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 218 transitions, 1102 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-11-12 02:29:14,279 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 465 flow [2023-11-12 02:29:14,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2023-11-12 02:29:14,280 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2023-11-12 02:29:14,281 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 465 flow [2023-11-12 02:29:14,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:14,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:14,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:29:14,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:29:14,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa24231-5fb4-4119-95fa-fea36b356d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:29:14,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:29:14,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash 627983223, now seen corresponding path program 1 times [2023-11-12 02:29:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6615286] [2023-11-12 02:29:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6615286] [2023-11-12 02:29:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6615286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:14,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:14,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:29:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272846606] [2023-11-12 02:29:14,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:14,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:14,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 273 [2023-11-12 02:29:14,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 465 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:14,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:14,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 273 [2023-11-12 02:29:14,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:20,531 INFO L124 PetriNetUnfolderBase]: 50467/65522 cut-off events. [2023-11-12 02:29:20,531 INFO L125 PetriNetUnfolderBase]: For 111823/111823 co-relation queries the response was YES. [2023-11-12 02:29:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215803 conditions, 65522 events. 50467/65522 cut-off events. For 111823/111823 co-relation queries the response was YES. Maximal size of possible extension queue 2214. Compared 346686 event pairs, 36761 based on Foata normal form. 4308/46120 useless extension candidates. Maximal degree in co-relation 165062. Up to 65522 conditions per place. [2023-11-12 02:29:20,903 INFO L140 encePairwiseOnDemand]: 271/273 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-11-12 02:29:20,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 568 flow [2023-11-12 02:29:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-11-12 02:29:20,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536019536019536 [2023-11-12 02:29:20,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-11-12 02:29:20,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-11-12 02:29:20,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:20,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-11-12 02:29:20,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:20,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:20,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:20,911 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 465 flow. Second operand 3 states and 439 transitions. [2023-11-12 02:29:20,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 568 flow [2023-11-12 02:29:23,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 502 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-11-12 02:29:23,741 INFO L231 Difference]: Finished difference. Result has 61 places, 67 transitions, 370 flow [2023-11-12 02:29:23,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=61, PETRI_TRANSITIONS=67} [2023-11-12 02:29:23,742 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2023-11-12 02:29:23,742 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 67 transitions, 370 flow [2023-11-12 02:29:23,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:23,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:29:23,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:29:23,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:29:23,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-12 02:29:23,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:29:23,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1747695549, now seen corresponding path program 1 times [2023-11-12 02:29:23,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:29:23,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11558866] [2023-11-12 02:29:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:29:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:29:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:29:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:29:23,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:29:23,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11558866] [2023-11-12 02:29:23,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11558866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:29:23,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:29:23,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:29:23,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923165639] [2023-11-12 02:29:23,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:29:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:29:23,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:29:23,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:29:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:29:23,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 273 [2023-11-12 02:29:23,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 67 transitions, 370 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:23,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:29:23,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 273 [2023-11-12 02:29:23,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:29:30,143 INFO L124 PetriNetUnfolderBase]: 55723/72098 cut-off events. [2023-11-12 02:29:30,143 INFO L125 PetriNetUnfolderBase]: For 79735/79735 co-relation queries the response was YES. [2023-11-12 02:29:30,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219111 conditions, 72098 events. 55723/72098 cut-off events. For 79735/79735 co-relation queries the response was YES. Maximal size of possible extension queue 2459. Compared 386374 event pairs, 33971 based on Foata normal form. 0/46874 useless extension candidates. Maximal degree in co-relation 219094. Up to 62603 conditions per place. [2023-11-12 02:29:30,558 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 100 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-11-12 02:29:30,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 105 transitions, 745 flow [2023-11-12 02:29:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:29:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:29:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-11-12 02:29:30,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2023-11-12 02:29:30,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-11-12 02:29:30,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-11-12 02:29:30,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:29:30,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-11-12 02:29:30,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:29:30,569 INFO L175 Difference]: Start difference. First operand has 61 places, 67 transitions, 370 flow. Second operand 3 states and 462 transitions. [2023-11-12 02:29:30,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 105 transitions, 745 flow