./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya --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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:43:34,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:43:34,128 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 00:43:34,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:43:34,134 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:43:34,161 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:43:34,162 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:43:34,162 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:43:34,163 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:43:34,164 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:43:34,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:43:34,165 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:43:34,166 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:43:34,166 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:43:34,167 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:43:34,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:43:34,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:43:34,169 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:43:34,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:43:34,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:43:34,170 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:43:34,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:43:34,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:43:34,172 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:43:34,172 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 00:43:34,173 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:43:34,173 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:43:34,174 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:43:34,174 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:43:34,175 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:43:34,175 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:43:34,176 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:43:34,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:43:34,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:43:34,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:43:34,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:43:34,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:43:34,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:43:34,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:43:34,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:43:34,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:43:34,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:43:34,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:43:34,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:43:34,180 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_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2023-11-29 00:43:34,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:43:34,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:43:34,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:43:34,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:43:34,442 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:43:34,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-29 00:43:37,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:43:37,512 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:43:37,513 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-29 00:43:37,529 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/data/3625abe69/d43b78ffb924473bb19368ddaf32207d/FLAGcb6ca67e8 [2023-11-29 00:43:37,542 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/data/3625abe69/d43b78ffb924473bb19368ddaf32207d [2023-11-29 00:43:37,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:43:37,547 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:43:37,548 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:43:37,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:43:37,554 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:43:37,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:43:37" (1/1) ... [2023-11-29 00:43:37,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8fc994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:37, skipping insertion in model container [2023-11-29 00:43:37,557 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:43:37" (1/1) ... [2023-11-29 00:43:37,602 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:43:37,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:43:37,990 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:43:38,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:43:38,091 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:43:38,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38 WrapperNode [2023-11-29 00:43:38,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:43:38,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:43:38,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:43:38,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:43:38,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,148 INFO L138 Inliner]: procedures = 278, calls = 42, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 175 [2023-11-29 00:43:38,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:43:38,149 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:43:38,149 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:43:38,149 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:43:38,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,164 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,181 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 3, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5, 0]. The 4 writes are split as follows [0, 1, 2, 0, 1]. [2023-11-29 00:43:38,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,201 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:43:38,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:43:38,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:43:38,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:43:38,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (1/1) ... [2023-11-29 00:43:38,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:43:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:38,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:43:38,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:43:38,267 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 00:43:38,268 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 00:43:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 00:43:38,268 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 00:43:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:43:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:43:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:43:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:43:38,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 00:43:38,269 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:43:38,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:43:38,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:43:38,272 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:43:38,434 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:43:38,436 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:43:38,698 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:43:38,873 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:43:38,874 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:43:38,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:43:38 BoogieIcfgContainer [2023-11-29 00:43:38,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:43:38,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:43:38,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:43:38,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:43:38,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:43:37" (1/3) ... [2023-11-29 00:43:38,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f0be6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:43:38, skipping insertion in model container [2023-11-29 00:43:38,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:43:38" (2/3) ... [2023-11-29 00:43:38,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f0be6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:43:38, skipping insertion in model container [2023-11-29 00:43:38,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:43:38" (3/3) ... [2023-11-29 00:43:38,883 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-11-29 00:43:38,891 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:43:38,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:43:38,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-29 00:43:38,903 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:43:38,959 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:43:38,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2023-11-29 00:43:39,026 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-11-29 00:43:39,027 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:43:39,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-29 00:43:39,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2023-11-29 00:43:39,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 99 flow [2023-11-29 00:43:39,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:43:39,051 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;@6ec7a1f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:43:39,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-29 00:43:39,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:43:39,060 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-11-29 00:43:39,060 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:43:39,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:39,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:39,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:39,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash 70640792, now seen corresponding path program 1 times [2023-11-29 00:43:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:39,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774285731] [2023-11-29 00:43:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:39,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:39,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774285731] [2023-11-29 00:43:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774285731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:39,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:39,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:43:39,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571956247] [2023-11-29 00:43:39,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:39,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:39,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:43:39,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:39,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:39,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:39,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:39,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:39,825 INFO L124 PetriNetUnfolderBase]: 737/1456 cut-off events. [2023-11-29 00:43:39,825 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-29 00:43:39,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2696 conditions, 1456 events. 737/1456 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8048 event pairs, 157 based on Foata normal form. 40/1329 useless extension candidates. Maximal degree in co-relation 2472. Up to 804 conditions per place. [2023-11-29 00:43:39,842 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 73 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-11-29 00:43:39,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 93 transitions, 362 flow [2023-11-29 00:43:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:43:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:43:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2023-11-29 00:43:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693877551020408 [2023-11-29 00:43:39,855 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 164 transitions. [2023-11-29 00:43:39,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 164 transitions. [2023-11-29 00:43:39,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:39,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 164 transitions. [2023-11-29 00:43:39,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:39,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:39,865 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:39,867 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 5 states and 164 transitions. [2023-11-29 00:43:39,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 93 transitions, 362 flow [2023-11-29 00:43:39,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 93 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:43:39,875 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 142 flow [2023-11-29 00:43:39,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-29 00:43:39,880 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-29 00:43:39,880 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 142 flow [2023-11-29 00:43:39,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:39,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:39,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:39,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:43:39,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:39,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1901818962, now seen corresponding path program 1 times [2023-11-29 00:43:39,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:39,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449759662] [2023-11-29 00:43:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:39,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449759662] [2023-11-29 00:43:39,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449759662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:39,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:39,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:43:39,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609779625] [2023-11-29 00:43:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:39,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:39,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:43:39,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-29 00:43:39,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:39,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:39,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-29 00:43:39,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:40,249 INFO L124 PetriNetUnfolderBase]: 604/1241 cut-off events. [2023-11-29 00:43:40,250 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-29 00:43:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1241 events. 604/1241 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6726 event pairs, 169 based on Foata normal form. 0/1129 useless extension candidates. Maximal degree in co-relation 2386. Up to 631 conditions per place. [2023-11-29 00:43:40,260 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 65 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2023-11-29 00:43:40,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 366 flow [2023-11-29 00:43:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:43:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:43:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2023-11-29 00:43:40,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2023-11-29 00:43:40,263 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 163 transitions. [2023-11-29 00:43:40,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 163 transitions. [2023-11-29 00:43:40,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:40,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 163 transitions. [2023-11-29 00:43:40,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,267 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,268 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 142 flow. Second operand 5 states and 163 transitions. [2023-11-29 00:43:40,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 366 flow [2023-11-29 00:43:40,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 362 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 00:43:40,273 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 162 flow [2023-11-29 00:43:40,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-29 00:43:40,274 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-11-29 00:43:40,274 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 162 flow [2023-11-29 00:43:40,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:40,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:40,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:43:40,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:40,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1173184616, now seen corresponding path program 1 times [2023-11-29 00:43:40,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:40,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690153837] [2023-11-29 00:43:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:40,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:40,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:40,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690153837] [2023-11-29 00:43:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690153837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:40,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:40,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:43:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911235858] [2023-11-29 00:43:40,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:40,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:43:40,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:40,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:40,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:40,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:40,748 INFO L124 PetriNetUnfolderBase]: 1140/2287 cut-off events. [2023-11-29 00:43:40,749 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-11-29 00:43:40,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5002 conditions, 2287 events. 1140/2287 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13362 event pairs, 518 based on Foata normal form. 72/2197 useless extension candidates. Maximal degree in co-relation 4019. Up to 1152 conditions per place. [2023-11-29 00:43:40,765 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 79 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-29 00:43:40,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 96 transitions, 480 flow [2023-11-29 00:43:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:43:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:43:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-29 00:43:40,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2023-11-29 00:43:40,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-29 00:43:40,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-29 00:43:40,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:40,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-29 00:43:40,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,770 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,770 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 162 flow. Second operand 4 states and 135 transitions. [2023-11-29 00:43:40,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 96 transitions, 480 flow [2023-11-29 00:43:40,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:43:40,777 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 186 flow [2023-11-29 00:43:40,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-29 00:43:40,778 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2023-11-29 00:43:40,779 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 186 flow [2023-11-29 00:43:40,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:40,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:40,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:43:40,780 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:40,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2053561760, now seen corresponding path program 1 times [2023-11-29 00:43:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:40,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960013239] [2023-11-29 00:43:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:40,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960013239] [2023-11-29 00:43:40,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960013239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:40,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:40,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:43:40,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61900882] [2023-11-29 00:43:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:40,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:40,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:43:40,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:40,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:40,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:40,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:40,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:41,302 INFO L124 PetriNetUnfolderBase]: 1397/2631 cut-off events. [2023-11-29 00:43:41,302 INFO L125 PetriNetUnfolderBase]: For 1245/1289 co-relation queries the response was YES. [2023-11-29 00:43:41,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 2631 events. 1397/2631 cut-off events. For 1245/1289 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15090 event pairs, 539 based on Foata normal form. 76/2602 useless extension candidates. Maximal degree in co-relation 4944. Up to 1439 conditions per place. [2023-11-29 00:43:41,326 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 78 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-11-29 00:43:41,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 506 flow [2023-11-29 00:43:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:43:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:43:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-29 00:43:41,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-29 00:43:41,328 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-29 00:43:41,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-29 00:43:41,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:41,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-29 00:43:41,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:41,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:41,331 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:41,331 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 186 flow. Second operand 4 states and 134 transitions. [2023-11-29 00:43:41,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 506 flow [2023-11-29 00:43:41,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:43:41,337 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 208 flow [2023-11-29 00:43:41,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-11-29 00:43:41,339 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-11-29 00:43:41,339 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 208 flow [2023-11-29 00:43:41,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:41,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:41,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:43:41,340 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:41,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1570774344, now seen corresponding path program 1 times [2023-11-29 00:43:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:41,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703123027] [2023-11-29 00:43:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:41,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703123027] [2023-11-29 00:43:41,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703123027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:41,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:41,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:43:41,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961130445] [2023-11-29 00:43:41,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:43:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:41,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:43:41,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:43:41,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-29 00:43:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2023-11-29 00:43:41,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:41,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-29 00:43:41,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:41,713 INFO L124 PetriNetUnfolderBase]: 695/1544 cut-off events. [2023-11-29 00:43:41,714 INFO L125 PetriNetUnfolderBase]: For 840/906 co-relation queries the response was YES. [2023-11-29 00:43:41,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3767 conditions, 1544 events. 695/1544 cut-off events. For 840/906 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8538 event pairs, 189 based on Foata normal form. 68/1562 useless extension candidates. Maximal degree in co-relation 3345. Up to 786 conditions per place. [2023-11-29 00:43:41,729 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 50 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-29 00:43:41,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 369 flow [2023-11-29 00:43:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:43:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:43:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-29 00:43:41,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 00:43:41,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-29 00:43:41,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-29 00:43:41,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:41,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-29 00:43:41,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:41,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 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) [2023-11-29 00:43:41,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 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) [2023-11-29 00:43:41,733 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 208 flow. Second operand 3 states and 98 transitions. [2023-11-29 00:43:41,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 369 flow [2023-11-29 00:43:41,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 359 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 00:43:41,741 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 194 flow [2023-11-29 00:43:41,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-29 00:43:41,743 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2023-11-29 00:43:41,743 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 194 flow [2023-11-29 00:43:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2023-11-29 00:43:41,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:41,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:41,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:43:41,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:41,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:41,744 INFO L85 PathProgramCache]: Analyzing trace with hash 282808308, now seen corresponding path program 1 times [2023-11-29 00:43:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:41,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293153694] [2023-11-29 00:43:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293153694] [2023-11-29 00:43:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293153694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919736389] [2023-11-29 00:43:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:41,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:41,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:41,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:43:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:42,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:43:42,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:42,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:43:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919736389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:42,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:43:42,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 00:43:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611661855] [2023-11-29 00:43:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:43:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:42,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:43:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:43:42,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:42,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:42,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:42,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:42,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:42,571 INFO L124 PetriNetUnfolderBase]: 1128/2392 cut-off events. [2023-11-29 00:43:42,572 INFO L125 PetriNetUnfolderBase]: For 1211/1327 co-relation queries the response was YES. [2023-11-29 00:43:42,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5932 conditions, 2392 events. 1128/2392 cut-off events. For 1211/1327 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 14093 event pairs, 228 based on Foata normal form. 18/2329 useless extension candidates. Maximal degree in co-relation 3454. Up to 892 conditions per place. [2023-11-29 00:43:42,596 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 97 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2023-11-29 00:43:42,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 119 transitions, 649 flow [2023-11-29 00:43:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:43:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:43:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2023-11-29 00:43:42,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2023-11-29 00:43:42,598 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 202 transitions. [2023-11-29 00:43:42,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 202 transitions. [2023-11-29 00:43:42,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:42,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 202 transitions. [2023-11-29 00:43:42,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:42,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:42,601 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:42,601 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 194 flow. Second operand 7 states and 202 transitions. [2023-11-29 00:43:42,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 119 transitions, 649 flow [2023-11-29 00:43:42,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 119 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:43:42,608 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 247 flow [2023-11-29 00:43:42,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2023-11-29 00:43:42,609 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 25 predicate places. [2023-11-29 00:43:42,609 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 247 flow [2023-11-29 00:43:42,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:42,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:42,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:42,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:43:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 00:43:42,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:42,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash 277408517, now seen corresponding path program 1 times [2023-11-29 00:43:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632016557] [2023-11-29 00:43:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:42,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:42,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:42,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632016557] [2023-11-29 00:43:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632016557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:42,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:42,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:43:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419855532] [2023-11-29 00:43:42,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:42,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:43:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:43:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:43:42,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:43:42,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:42,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:42,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:43:42,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:43,587 INFO L124 PetriNetUnfolderBase]: 1656/3378 cut-off events. [2023-11-29 00:43:43,588 INFO L125 PetriNetUnfolderBase]: For 2451/2667 co-relation queries the response was YES. [2023-11-29 00:43:43,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8733 conditions, 3378 events. 1656/3378 cut-off events. For 2451/2667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 20915 event pairs, 298 based on Foata normal form. 28/3389 useless extension candidates. Maximal degree in co-relation 5657. Up to 1431 conditions per place. [2023-11-29 00:43:43,615 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 108 selfloop transitions, 9 changer transitions 0/129 dead transitions. [2023-11-29 00:43:43,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 747 flow [2023-11-29 00:43:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:43:43,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:43:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2023-11-29 00:43:43,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2023-11-29 00:43:43,617 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 195 transitions. [2023-11-29 00:43:43,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 195 transitions. [2023-11-29 00:43:43,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:43,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 195 transitions. [2023-11-29 00:43:43,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:43,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:43,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:43,620 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 247 flow. Second operand 7 states and 195 transitions. [2023-11-29 00:43:43,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 747 flow [2023-11-29 00:43:43,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 739 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 00:43:43,629 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 308 flow [2023-11-29 00:43:43,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=308, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2023-11-29 00:43:43,630 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-11-29 00:43:43,630 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 308 flow [2023-11-29 00:43:43,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:43,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:43,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:43,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:43:43,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:43,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:43,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1049580242, now seen corresponding path program 1 times [2023-11-29 00:43:43,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:43,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266160750] [2023-11-29 00:43:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:43,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:43,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:43,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266160750] [2023-11-29 00:43:43,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266160750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:43,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066153558] [2023-11-29 00:43:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:43,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:43,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:43,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:43:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:43,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:43:43,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:43,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:43:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066153558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:43,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:43:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 00:43:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091635140] [2023-11-29 00:43:43,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:43,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:43:43,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:43,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:43:43,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:43:43,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:43,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:43,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:43,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:43,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:44,504 INFO L124 PetriNetUnfolderBase]: 1553/3290 cut-off events. [2023-11-29 00:43:44,504 INFO L125 PetriNetUnfolderBase]: For 3229/3407 co-relation queries the response was YES. [2023-11-29 00:43:44,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8667 conditions, 3290 events. 1553/3290 cut-off events. For 3229/3407 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21026 event pairs, 78 based on Foata normal form. 82/3289 useless extension candidates. Maximal degree in co-relation 7230. Up to 1114 conditions per place. [2023-11-29 00:43:44,529 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 141 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2023-11-29 00:43:44,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 162 transitions, 1160 flow [2023-11-29 00:43:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:43:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:43:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2023-11-29 00:43:44,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2023-11-29 00:43:44,531 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 192 transitions. [2023-11-29 00:43:44,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 192 transitions. [2023-11-29 00:43:44,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:44,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 192 transitions. [2023-11-29 00:43:44,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:44,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:44,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:44,533 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 308 flow. Second operand 6 states and 192 transitions. [2023-11-29 00:43:44,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 162 transitions, 1160 flow [2023-11-29 00:43:44,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 162 transitions, 1140 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-29 00:43:44,547 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 308 flow [2023-11-29 00:43:44,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2023-11-29 00:43:44,548 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 34 predicate places. [2023-11-29 00:43:44,549 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 308 flow [2023-11-29 00:43:44,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:44,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:44,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:44,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:43:44,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:43:44,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:44,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash 177123455, now seen corresponding path program 1 times [2023-11-29 00:43:44,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:44,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406353867] [2023-11-29 00:43:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:44,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:44,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:44,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406353867] [2023-11-29 00:43:44,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406353867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:44,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789083529] [2023-11-29 00:43:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:44,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:44,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:44,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:44,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:43:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:44,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:43:44,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:45,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789083529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:43:45,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:43:45,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 00:43:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808912601] [2023-11-29 00:43:45,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:45,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:43:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:43:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:43:45,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:45,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 308 flow. Second operand has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:45,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:45,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:45,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:45,961 INFO L124 PetriNetUnfolderBase]: 2514/5254 cut-off events. [2023-11-29 00:43:45,961 INFO L125 PetriNetUnfolderBase]: For 6618/6844 co-relation queries the response was YES. [2023-11-29 00:43:45,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14729 conditions, 5254 events. 2514/5254 cut-off events. For 6618/6844 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 33796 event pairs, 514 based on Foata normal form. 90/5315 useless extension candidates. Maximal degree in co-relation 13288. Up to 1407 conditions per place. [2023-11-29 00:43:45,990 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 169 selfloop transitions, 18 changer transitions 0/201 dead transitions. [2023-11-29 00:43:45,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 201 transitions, 1324 flow [2023-11-29 00:43:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:43:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 00:43:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 336 transitions. [2023-11-29 00:43:45,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2023-11-29 00:43:45,992 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 336 transitions. [2023-11-29 00:43:45,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 336 transitions. [2023-11-29 00:43:45,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:45,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 336 transitions. [2023-11-29 00:43:45,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.545454545454547) internal successors, (336), 11 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:45,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:45,996 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:45,996 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 308 flow. Second operand 11 states and 336 transitions. [2023-11-29 00:43:45,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 201 transitions, 1324 flow [2023-11-29 00:43:46,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 201 transitions, 1276 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:43:46,010 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 461 flow [2023-11-29 00:43:46,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=461, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-11-29 00:43:46,011 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 45 predicate places. [2023-11-29 00:43:46,012 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 461 flow [2023-11-29 00:43:46,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:46,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:46,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:46,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:43:46,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:43:46,215 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:46,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:46,215 INFO L85 PathProgramCache]: Analyzing trace with hash -535949365, now seen corresponding path program 1 times [2023-11-29 00:43:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:46,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773206285] [2023-11-29 00:43:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:46,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:46,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773206285] [2023-11-29 00:43:46,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773206285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:46,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:46,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:43:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750092580] [2023-11-29 00:43:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:43:46,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:43:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:43:46,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:43:46,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:46,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:46,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:43:46,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:47,139 INFO L124 PetriNetUnfolderBase]: 2885/5772 cut-off events. [2023-11-29 00:43:47,139 INFO L125 PetriNetUnfolderBase]: For 8457/8789 co-relation queries the response was YES. [2023-11-29 00:43:47,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16674 conditions, 5772 events. 2885/5772 cut-off events. For 8457/8789 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 36450 event pairs, 684 based on Foata normal form. 42/5787 useless extension candidates. Maximal degree in co-relation 14281. Up to 3409 conditions per place. [2023-11-29 00:43:47,167 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 116 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2023-11-29 00:43:47,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 965 flow [2023-11-29 00:43:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:43:47,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 00:43:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2023-11-29 00:43:47,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 00:43:47,170 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 196 transitions. [2023-11-29 00:43:47,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 196 transitions. [2023-11-29 00:43:47,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:47,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 196 transitions. [2023-11-29 00:43:47,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.0) internal successors, (196), 7 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) [2023-11-29 00:43:47,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:47,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:47,172 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 461 flow. Second operand 7 states and 196 transitions. [2023-11-29 00:43:47,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 965 flow [2023-11-29 00:43:47,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 951 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 00:43:47,194 INFO L231 Difference]: Finished difference. Result has 99 places, 78 transitions, 524 flow [2023-11-29 00:43:47,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2023-11-29 00:43:47,195 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-29 00:43:47,196 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 524 flow [2023-11-29 00:43:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:47,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:47,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:47,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:43:47,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:47,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1822751390, now seen corresponding path program 1 times [2023-11-29 00:43:47,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:47,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982819018] [2023-11-29 00:43:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:47,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:43:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:47,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982819018] [2023-11-29 00:43:47,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982819018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:47,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:47,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:43:47,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646446216] [2023-11-29 00:43:47,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:47,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:43:47,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 00:43:47,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:47,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:47,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 00:43:47,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:48,094 INFO L124 PetriNetUnfolderBase]: 2959/6098 cut-off events. [2023-11-29 00:43:48,094 INFO L125 PetriNetUnfolderBase]: For 9839/10073 co-relation queries the response was YES. [2023-11-29 00:43:48,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17546 conditions, 6098 events. 2959/6098 cut-off events. For 9839/10073 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 40365 event pairs, 507 based on Foata normal form. 146/6243 useless extension candidates. Maximal degree in co-relation 15660. Up to 2960 conditions per place. [2023-11-29 00:43:48,129 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 120 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-11-29 00:43:48,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 142 transitions, 1274 flow [2023-11-29 00:43:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:43:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:43:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-29 00:43:48,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-29 00:43:48,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-29 00:43:48,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-29 00:43:48,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:48,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-29 00:43:48,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:48,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:48,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:48,133 INFO L175 Difference]: Start difference. First operand has 99 places, 78 transitions, 524 flow. Second operand 4 states and 120 transitions. [2023-11-29 00:43:48,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 142 transitions, 1274 flow [2023-11-29 00:43:48,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 142 transitions, 1252 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-29 00:43:48,172 INFO L231 Difference]: Finished difference. Result has 99 places, 78 transitions, 528 flow [2023-11-29 00:43:48,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=528, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2023-11-29 00:43:48,173 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-29 00:43:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 528 flow [2023-11-29 00:43:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:48,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:48,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:43:48,174 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -878940028, now seen corresponding path program 1 times [2023-11-29 00:43:48,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:48,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62440783] [2023-11-29 00:43:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:48,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:48,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:48,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62440783] [2023-11-29 00:43:48,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62440783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:48,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049183664] [2023-11-29 00:43:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:48,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:48,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:48,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:48,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:43:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:48,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:43:48,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:48,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:43:48,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049183664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:48,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:43:48,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 00:43:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740439834] [2023-11-29 00:43:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:48,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:43:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:43:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:43:48,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:48,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:48,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:48,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:48,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:49,355 INFO L124 PetriNetUnfolderBase]: 2947/5906 cut-off events. [2023-11-29 00:43:49,355 INFO L125 PetriNetUnfolderBase]: For 11134/11152 co-relation queries the response was YES. [2023-11-29 00:43:49,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17953 conditions, 5906 events. 2947/5906 cut-off events. For 11134/11152 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 38154 event pairs, 349 based on Foata normal form. 178/5906 useless extension candidates. Maximal degree in co-relation 17116. Up to 3416 conditions per place. [2023-11-29 00:43:49,384 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 131 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2023-11-29 00:43:49,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 152 transitions, 1216 flow [2023-11-29 00:43:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:43:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:43:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2023-11-29 00:43:49,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-29 00:43:49,385 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 189 transitions. [2023-11-29 00:43:49,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 189 transitions. [2023-11-29 00:43:49,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:49,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 189 transitions. [2023-11-29 00:43:49,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:49,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:49,387 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:49,387 INFO L175 Difference]: Start difference. First operand has 99 places, 78 transitions, 528 flow. Second operand 6 states and 189 transitions. [2023-11-29 00:43:49,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 152 transitions, 1216 flow [2023-11-29 00:43:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 152 transitions, 1180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:43:49,411 INFO L231 Difference]: Finished difference. Result has 101 places, 77 transitions, 526 flow [2023-11-29 00:43:49,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=101, PETRI_TRANSITIONS=77} [2023-11-29 00:43:49,411 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 54 predicate places. [2023-11-29 00:43:49,412 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 77 transitions, 526 flow [2023-11-29 00:43:49,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:49,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:49,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 00:43:49,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:43:49,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:49,612 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:49,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1477336588, now seen corresponding path program 1 times [2023-11-29 00:43:49,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116493025] [2023-11-29 00:43:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:43:49,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116493025] [2023-11-29 00:43:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116493025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:43:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:43:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465089620] [2023-11-29 00:43:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:43:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 00:43:49,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 77 transitions, 526 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:49,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:49,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 00:43:49,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:50,510 INFO L124 PetriNetUnfolderBase]: 3062/6052 cut-off events. [2023-11-29 00:43:50,510 INFO L125 PetriNetUnfolderBase]: For 10579/10579 co-relation queries the response was YES. [2023-11-29 00:43:50,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18391 conditions, 6052 events. 3062/6052 cut-off events. For 10579/10579 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 38358 event pairs, 765 based on Foata normal form. 178/6206 useless extension candidates. Maximal degree in co-relation 15337. Up to 2727 conditions per place. [2023-11-29 00:43:50,541 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 108 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-11-29 00:43:50,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 129 transitions, 1092 flow [2023-11-29 00:43:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:43:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:43:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-29 00:43:50,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-29 00:43:50,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-29 00:43:50,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-29 00:43:50,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:50,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-29 00:43:50,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:50,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:50,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:50,545 INFO L175 Difference]: Start difference. First operand has 101 places, 77 transitions, 526 flow. Second operand 4 states and 120 transitions. [2023-11-29 00:43:50,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 129 transitions, 1092 flow [2023-11-29 00:43:50,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 1083 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 00:43:50,583 INFO L231 Difference]: Finished difference. Result has 100 places, 77 transitions, 533 flow [2023-11-29 00:43:50,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=533, PETRI_PLACES=100, PETRI_TRANSITIONS=77} [2023-11-29 00:43:50,584 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 53 predicate places. [2023-11-29 00:43:50,584 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 77 transitions, 533 flow [2023-11-29 00:43:50,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:50,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:50,585 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, 1, 1, 1, 1, 1] [2023-11-29 00:43:50,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:43:50,585 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:50,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1980566305, now seen corresponding path program 1 times [2023-11-29 00:43:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:50,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135414418] [2023-11-29 00:43:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135414418] [2023-11-29 00:43:50,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135414418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:50,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007864918] [2023-11-29 00:43:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:50,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:50,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:43:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:50,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:43:50,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:50,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:43:50,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007864918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:50,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:43:50,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-29 00:43:50,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833120006] [2023-11-29 00:43:50,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:50,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:43:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:43:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:43:50,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:50,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 77 transitions, 533 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:50,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:50,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:50,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:51,677 INFO L124 PetriNetUnfolderBase]: 2712/5522 cut-off events. [2023-11-29 00:43:51,677 INFO L125 PetriNetUnfolderBase]: For 11149/11149 co-relation queries the response was YES. [2023-11-29 00:43:51,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 5522 events. 2712/5522 cut-off events. For 11149/11149 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 35599 event pairs, 2030 based on Foata normal form. 24/5503 useless extension candidates. Maximal degree in co-relation 15455. Up to 4184 conditions per place. [2023-11-29 00:43:51,702 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 56 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2023-11-29 00:43:51,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 708 flow [2023-11-29 00:43:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:43:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:43:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2023-11-29 00:43:51,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2023-11-29 00:43:51,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 102 transitions. [2023-11-29 00:43:51,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 102 transitions. [2023-11-29 00:43:51,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:51,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 102 transitions. [2023-11-29 00:43:51,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:51,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:51,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:51,705 INFO L175 Difference]: Start difference. First operand has 100 places, 77 transitions, 533 flow. Second operand 4 states and 102 transitions. [2023-11-29 00:43:51,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 708 flow [2023-11-29 00:43:51,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 85 transitions, 698 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 00:43:51,728 INFO L231 Difference]: Finished difference. Result has 99 places, 76 transitions, 545 flow [2023-11-29 00:43:51,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=545, PETRI_PLACES=99, PETRI_TRANSITIONS=76} [2023-11-29 00:43:51,729 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-29 00:43:51,729 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 76 transitions, 545 flow [2023-11-29 00:43:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:51,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:51,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:43:51,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:43:51,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:51,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1145359499, now seen corresponding path program 1 times [2023-11-29 00:43:51,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:51,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893325104] [2023-11-29 00:43:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:51,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:52,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:52,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893325104] [2023-11-29 00:43:52,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893325104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:52,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207966165] [2023-11-29 00:43:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:52,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:52,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:43:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:52,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:43:52,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:52,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:43:52,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207966165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:43:52,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:43:52,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-29 00:43:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010561673] [2023-11-29 00:43:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:43:52,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:43:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:43:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:43:52,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:43:52,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 76 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:52,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:52,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:43:52,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:53,323 INFO L124 PetriNetUnfolderBase]: 3321/6452 cut-off events. [2023-11-29 00:43:53,323 INFO L125 PetriNetUnfolderBase]: For 12964/12964 co-relation queries the response was YES. [2023-11-29 00:43:53,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20203 conditions, 6452 events. 3321/6452 cut-off events. For 12964/12964 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 40399 event pairs, 611 based on Foata normal form. 70/6495 useless extension candidates. Maximal degree in co-relation 17161. Up to 2613 conditions per place. [2023-11-29 00:43:53,360 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 161 selfloop transitions, 30 changer transitions 0/201 dead transitions. [2023-11-29 00:43:53,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 201 transitions, 1504 flow [2023-11-29 00:43:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:43:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 00:43:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2023-11-29 00:43:53,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-11-29 00:43:53,362 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 314 transitions. [2023-11-29 00:43:53,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 314 transitions. [2023-11-29 00:43:53,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:53,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 314 transitions. [2023-11-29 00:43:53,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.166666666666668) internal successors, (314), 12 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:53,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:53,365 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:53,365 INFO L175 Difference]: Start difference. First operand has 99 places, 76 transitions, 545 flow. Second operand 12 states and 314 transitions. [2023-11-29 00:43:53,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 201 transitions, 1504 flow [2023-11-29 00:43:53,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 201 transitions, 1464 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 00:43:53,394 INFO L231 Difference]: Finished difference. Result has 110 places, 88 transitions, 716 flow [2023-11-29 00:43:53,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=716, PETRI_PLACES=110, PETRI_TRANSITIONS=88} [2023-11-29 00:43:53,395 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 63 predicate places. [2023-11-29 00:43:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 88 transitions, 716 flow [2023-11-29 00:43:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:53,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:53,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:43:53,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:43:53,596 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:53,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash 144202320, now seen corresponding path program 1 times [2023-11-29 00:43:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:53,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789117210] [2023-11-29 00:43:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:53,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789117210] [2023-11-29 00:43:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789117210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889902247] [2023-11-29 00:43:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:53,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:53,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:53,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:43:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:53,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:43:53,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:53,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:54,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889902247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:43:54,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:43:54,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-29 00:43:54,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029479065] [2023-11-29 00:43:54,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:54,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:43:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:43:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:43:54,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 00:43:54,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 88 transitions, 716 flow. Second operand has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:54,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:54,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 00:43:54,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:55,740 INFO L124 PetriNetUnfolderBase]: 4967/9474 cut-off events. [2023-11-29 00:43:55,740 INFO L125 PetriNetUnfolderBase]: For 20115/20115 co-relation queries the response was YES. [2023-11-29 00:43:55,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30166 conditions, 9474 events. 4967/9474 cut-off events. For 20115/20115 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 61688 event pairs, 727 based on Foata normal form. 80/9529 useless extension candidates. Maximal degree in co-relation 26818. Up to 3638 conditions per place. [2023-11-29 00:43:55,797 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 254 selfloop transitions, 67 changer transitions 0/330 dead transitions. [2023-11-29 00:43:55,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 330 transitions, 2563 flow [2023-11-29 00:43:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:43:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 00:43:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 557 transitions. [2023-11-29 00:43:55,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736394557823129 [2023-11-29 00:43:55,800 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 557 transitions. [2023-11-29 00:43:55,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 557 transitions. [2023-11-29 00:43:55,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:55,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 557 transitions. [2023-11-29 00:43:55,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 23.208333333333332) internal successors, (557), 24 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:55,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:55,806 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:55,806 INFO L175 Difference]: Start difference. First operand has 110 places, 88 transitions, 716 flow. Second operand 24 states and 557 transitions. [2023-11-29 00:43:55,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 330 transitions, 2563 flow [2023-11-29 00:43:55,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 330 transitions, 2509 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-29 00:43:55,859 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1236 flow [2023-11-29 00:43:55,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1236, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2023-11-29 00:43:55,860 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 88 predicate places. [2023-11-29 00:43:55,860 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1236 flow [2023-11-29 00:43:55,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:55,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:55,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:55,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:43:56,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:43:56,061 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:56,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1146406623, now seen corresponding path program 1 times [2023-11-29 00:43:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:56,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330082206] [2023-11-29 00:43:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:56,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:56,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330082206] [2023-11-29 00:43:56,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330082206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:56,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638191863] [2023-11-29 00:43:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:56,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:56,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:43:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:56,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:43:56,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:56,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638191863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:43:56,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:43:56,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-29 00:43:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231829268] [2023-11-29 00:43:56,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:56,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:43:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:56,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:43:56,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:43:56,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:43:56,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1236 flow. Second operand has 16 states, 16 states have (on average 17.625) internal successors, (282), 16 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:56,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:56,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:43:56,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:58,511 INFO L124 PetriNetUnfolderBase]: 6151/12096 cut-off events. [2023-11-29 00:43:58,511 INFO L125 PetriNetUnfolderBase]: For 35423/35423 co-relation queries the response was YES. [2023-11-29 00:43:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38421 conditions, 12096 events. 6151/12096 cut-off events. For 35423/35423 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 83019 event pairs, 1407 based on Foata normal form. 462/12525 useless extension candidates. Maximal degree in co-relation 35313. Up to 3236 conditions per place. [2023-11-29 00:43:58,597 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 200 selfloop transitions, 104 changer transitions 0/315 dead transitions. [2023-11-29 00:43:58,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 315 transitions, 2808 flow [2023-11-29 00:43:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:43:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 00:43:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 436 transitions. [2023-11-29 00:43:58,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234093637454982 [2023-11-29 00:43:58,599 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 436 transitions. [2023-11-29 00:43:58,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 436 transitions. [2023-11-29 00:43:58,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:58,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 436 transitions. [2023-11-29 00:43:58,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 25.647058823529413) internal successors, (436), 17 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:58,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:58,603 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:58,603 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1236 flow. Second operand 17 states and 436 transitions. [2023-11-29 00:43:58,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 315 transitions, 2808 flow [2023-11-29 00:43:58,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 315 transitions, 2559 flow, removed 110 selfloop flow, removed 5 redundant places. [2023-11-29 00:43:58,704 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1557 flow [2023-11-29 00:43:58,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1557, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2023-11-29 00:43:58,705 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 94 predicate places. [2023-11-29 00:43:58,705 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1557 flow [2023-11-29 00:43:58,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.625) internal successors, (282), 16 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:58,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:58,705 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 00:43:58,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:43:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:43:58,906 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:43:58,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1259138213, now seen corresponding path program 2 times [2023-11-29 00:43:58,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:58,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948396670] [2023-11-29 00:43:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:58,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:59,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948396670] [2023-11-29 00:43:59,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948396670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316837843] [2023-11-29 00:43:59,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:43:59,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:59,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:59,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:43:59,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:43:59,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:43:59,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:43:59,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:59,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316837843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:43:59,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:43:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 00:43:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170534860] [2023-11-29 00:43:59,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:43:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:43:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:43:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:43:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:43:59,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 00:43:59,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1557 flow. Second operand has 24 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:59,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:43:59,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 00:43:59,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:02,761 INFO L124 PetriNetUnfolderBase]: 8833/17378 cut-off events. [2023-11-29 00:44:02,761 INFO L125 PetriNetUnfolderBase]: For 51964/51964 co-relation queries the response was YES. [2023-11-29 00:44:02,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56768 conditions, 17378 events. 8833/17378 cut-off events. For 51964/51964 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 119599 event pairs, 2687 based on Foata normal form. 144/17459 useless extension candidates. Maximal degree in co-relation 51637. Up to 7569 conditions per place. [2023-11-29 00:44:02,877 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 436 selfloop transitions, 49 changer transitions 0/499 dead transitions. [2023-11-29 00:44:02,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 499 transitions, 4310 flow [2023-11-29 00:44:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:44:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 00:44:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 706 transitions. [2023-11-29 00:44:02,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549165120593692 [2023-11-29 00:44:02,881 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 706 transitions. [2023-11-29 00:44:02,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 706 transitions. [2023-11-29 00:44:02,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:02,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 706 transitions. [2023-11-29 00:44:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 32.09090909090909) internal successors, (706), 22 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:02,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:02,889 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:02,889 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1557 flow. Second operand 22 states and 706 transitions. [2023-11-29 00:44:02,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 499 transitions, 4310 flow [2023-11-29 00:44:03,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 499 transitions, 4120 flow, removed 83 selfloop flow, removed 4 redundant places. [2023-11-29 00:44:03,087 INFO L231 Difference]: Finished difference. Result has 164 places, 180 transitions, 1942 flow [2023-11-29 00:44:03,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1942, PETRI_PLACES=164, PETRI_TRANSITIONS=180} [2023-11-29 00:44:03,088 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 117 predicate places. [2023-11-29 00:44:03,088 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 180 transitions, 1942 flow [2023-11-29 00:44:03,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:03,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:44:03,089 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:03,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:44:03,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:44:03,289 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:44:03,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2062870858, now seen corresponding path program 1 times [2023-11-29 00:44:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013818370] [2023-11-29 00:44:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:03,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:44:03,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013818370] [2023-11-29 00:44:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013818370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981533864] [2023-11-29 00:44:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:03,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:03,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:03,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:03,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:44:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:03,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:44:03,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 00:44:03,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 00:44:03,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981533864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:03,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:03,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-11-29 00:44:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776484546] [2023-11-29 00:44:03,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:03,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:44:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:44:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:44:03,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:44:03,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 180 transitions, 1942 flow. Second operand has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:03,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:44:03,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:44:03,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:08,853 INFO L124 PetriNetUnfolderBase]: 13697/26826 cut-off events. [2023-11-29 00:44:08,853 INFO L125 PetriNetUnfolderBase]: For 70552/70552 co-relation queries the response was YES. [2023-11-29 00:44:08,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85707 conditions, 26826 events. 13697/26826 cut-off events. For 70552/70552 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 201195 event pairs, 2182 based on Foata normal form. 192/26942 useless extension candidates. Maximal degree in co-relation 82351. Up to 5837 conditions per place. [2023-11-29 00:44:09,043 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 365 selfloop transitions, 192 changer transitions 0/568 dead transitions. [2023-11-29 00:44:09,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 568 transitions, 5346 flow [2023-11-29 00:44:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:44:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 00:44:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 676 transitions. [2023-11-29 00:44:09,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2023-11-29 00:44:09,045 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 676 transitions. [2023-11-29 00:44:09,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 676 transitions. [2023-11-29 00:44:09,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:09,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 676 transitions. [2023-11-29 00:44:09,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:09,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:09,049 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:09,049 INFO L175 Difference]: Start difference. First operand has 164 places, 180 transitions, 1942 flow. Second operand 26 states and 676 transitions. [2023-11-29 00:44:09,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 568 transitions, 5346 flow [2023-11-29 00:44:09,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 568 transitions, 5249 flow, removed 25 selfloop flow, removed 6 redundant places. [2023-11-29 00:44:09,331 INFO L231 Difference]: Finished difference. Result has 193 places, 293 transitions, 3773 flow [2023-11-29 00:44:09,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3773, PETRI_PLACES=193, PETRI_TRANSITIONS=293} [2023-11-29 00:44:09,332 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 146 predicate places. [2023-11-29 00:44:09,332 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 293 transitions, 3773 flow [2023-11-29 00:44:09,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:09,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:44:09,333 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:09,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:44:09,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:09,533 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:44:09,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1006926773, now seen corresponding path program 2 times [2023-11-29 00:44:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:09,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760688356] [2023-11-29 00:44:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:09,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760688356] [2023-11-29 00:44:09,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760688356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706298718] [2023-11-29 00:44:09,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:44:09,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:09,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:09,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:44:10,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:44:10,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:10,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:44:10,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:10,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:44:10,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706298718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:10,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:10,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-29 00:44:10,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298502274] [2023-11-29 00:44:10,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:10,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:44:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:10,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:44:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:44:10,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 00:44:10,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 293 transitions, 3773 flow. Second operand has 26 states, 26 states have (on average 17.384615384615383) internal successors, (452), 26 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:10,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:44:10,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 00:44:10,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:19,892 INFO L124 PetriNetUnfolderBase]: 22308/42391 cut-off events. [2023-11-29 00:44:19,893 INFO L125 PetriNetUnfolderBase]: For 124135/124135 co-relation queries the response was YES. [2023-11-29 00:44:20,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139270 conditions, 42391 events. 22308/42391 cut-off events. For 124135/124135 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 333236 event pairs, 4207 based on Foata normal form. 350/42630 useless extension candidates. Maximal degree in co-relation 135758. Up to 11272 conditions per place. [2023-11-29 00:44:20,289 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 480 selfloop transitions, 368 changer transitions 0/857 dead transitions. [2023-11-29 00:44:20,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 857 transitions, 9337 flow [2023-11-29 00:44:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:44:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 00:44:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 961 transitions. [2023-11-29 00:44:20,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47834743653558986 [2023-11-29 00:44:20,292 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 961 transitions. [2023-11-29 00:44:20,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 961 transitions. [2023-11-29 00:44:20,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:20,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 961 transitions. [2023-11-29 00:44:20,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 23.4390243902439) internal successors, (961), 41 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:20,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 49.0) internal successors, (2058), 42 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:20,298 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 49.0) internal successors, (2058), 42 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:20,298 INFO L175 Difference]: Start difference. First operand has 193 places, 293 transitions, 3773 flow. Second operand 41 states and 961 transitions. [2023-11-29 00:44:20,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 857 transitions, 9337 flow [2023-11-29 00:44:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 857 transitions, 9235 flow, removed 49 selfloop flow, removed 2 redundant places. [2023-11-29 00:44:21,232 INFO L231 Difference]: Finished difference. Result has 242 places, 466 transitions, 7026 flow [2023-11-29 00:44:21,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7026, PETRI_PLACES=242, PETRI_TRANSITIONS=466} [2023-11-29 00:44:21,233 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 195 predicate places. [2023-11-29 00:44:21,233 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 466 transitions, 7026 flow [2023-11-29 00:44:21,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.384615384615383) internal successors, (452), 26 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:21,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:44:21,233 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:21,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:44:21,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:21,434 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:44:21,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1295697576, now seen corresponding path program 2 times [2023-11-29 00:44:21,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:21,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387362025] [2023-11-29 00:44:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:21,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:44:21,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387362025] [2023-11-29 00:44:21,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387362025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806394845] [2023-11-29 00:44:21,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:44:21,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:21,942 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:21,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:44:22,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:44:22,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:44:22,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:44:22,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:44:22,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:44:22,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806394845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:22,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:22,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2023-11-29 00:44:22,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901506727] [2023-11-29 00:44:22,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:22,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:44:22,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:22,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:44:22,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:44:22,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:44:22,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 466 transitions, 7026 flow. Second operand has 28 states, 28 states have (on average 18.142857142857142) internal successors, (508), 28 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:22,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:44:22,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:44:22,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:44:38,438 INFO L124 PetriNetUnfolderBase]: 31842/62525 cut-off events. [2023-11-29 00:44:38,438 INFO L125 PetriNetUnfolderBase]: For 254845/254845 co-relation queries the response was YES. [2023-11-29 00:44:38,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212818 conditions, 62525 events. 31842/62525 cut-off events. For 254845/254845 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 535137 event pairs, 6221 based on Foata normal form. 630/62988 useless extension candidates. Maximal degree in co-relation 209351. Up to 13234 conditions per place. [2023-11-29 00:44:39,142 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 518 selfloop transitions, 645 changer transitions 0/1175 dead transitions. [2023-11-29 00:44:39,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1175 transitions, 15216 flow [2023-11-29 00:44:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:44:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-29 00:44:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1063 transitions. [2023-11-29 00:44:39,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291189646590343 [2023-11-29 00:44:39,146 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 1063 transitions. [2023-11-29 00:44:39,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 1063 transitions. [2023-11-29 00:44:39,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:44:39,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 1063 transitions. [2023-11-29 00:44:39,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 25.926829268292682) internal successors, (1063), 41 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:39,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 49.0) internal successors, (2058), 42 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:39,152 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 49.0) internal successors, (2058), 42 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:39,152 INFO L175 Difference]: Start difference. First operand has 242 places, 466 transitions, 7026 flow. Second operand 41 states and 1063 transitions. [2023-11-29 00:44:39,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1175 transitions, 15216 flow [2023-11-29 00:44:42,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1175 transitions, 14817 flow, removed 20 selfloop flow, removed 8 redundant places. [2023-11-29 00:44:42,201 INFO L231 Difference]: Finished difference. Result has 276 places, 733 transitions, 12692 flow [2023-11-29 00:44:42,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12692, PETRI_PLACES=276, PETRI_TRANSITIONS=733} [2023-11-29 00:44:42,202 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 229 predicate places. [2023-11-29 00:44:42,202 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 733 transitions, 12692 flow [2023-11-29 00:44:42,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 18.142857142857142) internal successors, (508), 28 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:42,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:44:42,202 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:44:42,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 00:44:42,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:42,403 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:44:42,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:44:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -671220897, now seen corresponding path program 1 times [2023-11-29 00:44:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:44:42,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933600507] [2023-11-29 00:44:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:44:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 00:44:42,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:44:42,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933600507] [2023-11-29 00:44:42,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933600507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:44:42,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109130837] [2023-11-29 00:44:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:44:42,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:44:42,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:44:42,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:44:42,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:44:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:44:43,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:44:43,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:44:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 00:44:43,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:44:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 00:44:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109130837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:44:43,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:44:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 00:44:43,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605589908] [2023-11-29 00:44:43,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:44:43,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:44:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:44:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:44:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:44:43,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:44:43,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 733 transitions, 12692 flow. Second operand has 24 states, 24 states have (on average 18.416666666666668) internal successors, (442), 24 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:44:43,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:44:43,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:44:43,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:45:15,584 INFO L124 PetriNetUnfolderBase]: 54445/107004 cut-off events. [2023-11-29 00:45:15,584 INFO L125 PetriNetUnfolderBase]: For 508946/508946 co-relation queries the response was YES. [2023-11-29 00:45:16,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374381 conditions, 107004 events. 54445/107004 cut-off events. For 508946/508946 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 999746 event pairs, 11397 based on Foata normal form. 616/107325 useless extension candidates. Maximal degree in co-relation 370885. Up to 16182 conditions per place. [2023-11-29 00:45:17,064 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 506 selfloop transitions, 1090 changer transitions 0/1608 dead transitions. [2023-11-29 00:45:17,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1608 transitions, 26766 flow [2023-11-29 00:45:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:45:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 00:45:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 810 transitions. [2023-11-29 00:45:17,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533245556287031 [2023-11-29 00:45:17,068 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 810 transitions. [2023-11-29 00:45:17,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 810 transitions. [2023-11-29 00:45:17,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:45:17,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 810 transitions. [2023-11-29 00:45:17,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 26.129032258064516) internal successors, (810), 31 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:17,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 49.0) internal successors, (1568), 32 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:17,074 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 49.0) internal successors, (1568), 32 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:17,074 INFO L175 Difference]: Start difference. First operand has 276 places, 733 transitions, 12692 flow. Second operand 31 states and 810 transitions. [2023-11-29 00:45:17,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1608 transitions, 26766 flow [2023-11-29 00:45:27,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1608 transitions, 26179 flow, removed 144 selfloop flow, removed 14 redundant places. [2023-11-29 00:45:27,205 INFO L231 Difference]: Finished difference. Result has 308 places, 1279 transitions, 25595 flow [2023-11-29 00:45:27,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=12397, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25595, PETRI_PLACES=308, PETRI_TRANSITIONS=1279} [2023-11-29 00:45:27,206 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 261 predicate places. [2023-11-29 00:45:27,206 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 1279 transitions, 25595 flow [2023-11-29 00:45:27,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.416666666666668) internal successors, (442), 24 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:27,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:45:27,207 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:45:27,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:45:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:27,407 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:45:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:45:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -443646863, now seen corresponding path program 1 times [2023-11-29 00:45:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:45:27,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37669735] [2023-11-29 00:45:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:45:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 00:45:27,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:45:27,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37669735] [2023-11-29 00:45:27,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37669735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:45:27,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342279757] [2023-11-29 00:45:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:45:27,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:45:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:45:27,693 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:45:27,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:45:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:45:27,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:45:27,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:45:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 00:45:28,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:45:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 00:45:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342279757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:45:28,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:45:28,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2023-11-29 00:45:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463921094] [2023-11-29 00:45:28,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:45:28,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:45:28,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:45:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:45:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:45:28,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 00:45:28,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 1279 transitions, 25595 flow. Second operand has 24 states, 24 states have (on average 18.083333333333332) internal successors, (434), 24 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:45:28,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:45:28,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 00:45:28,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:47:03,111 INFO L124 PetriNetUnfolderBase]: 111801/213434 cut-off events. [2023-11-29 00:47:03,111 INFO L125 PetriNetUnfolderBase]: For 1133373/1133373 co-relation queries the response was YES. [2023-11-29 00:47:05,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769725 conditions, 213434 events. 111801/213434 cut-off events. For 1133373/1133373 co-relation queries the response was YES. Maximal size of possible extension queue 2062. Compared 2106742 event pairs, 23091 based on Foata normal form. 1520/214437 useless extension candidates. Maximal degree in co-relation 766066. Up to 33765 conditions per place. [2023-11-29 00:47:06,702 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 468 selfloop transitions, 2260 changer transitions 0/2737 dead transitions. [2023-11-29 00:47:06,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 2737 transitions, 55756 flow [2023-11-29 00:47:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:47:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 00:47:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 746 transitions. [2023-11-29 00:47:06,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475765306122449 [2023-11-29 00:47:06,704 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 746 transitions. [2023-11-29 00:47:06,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 746 transitions. [2023-11-29 00:47:06,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:47:06,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 746 transitions. [2023-11-29 00:47:06,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 23.3125) internal successors, (746), 32 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:06,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 49.0) internal successors, (1617), 33 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:06,710 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 49.0) internal successors, (1617), 33 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:06,711 INFO L175 Difference]: Start difference. First operand has 308 places, 1279 transitions, 25595 flow. Second operand 32 states and 746 transitions. [2023-11-29 00:47:06,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 2737 transitions, 55756 flow [2023-11-29 00:47:41,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 2737 transitions, 55368 flow, removed 63 selfloop flow, removed 3 redundant places. [2023-11-29 00:47:41,971 INFO L231 Difference]: Finished difference. Result has 337 places, 2447 transitions, 55650 flow [2023-11-29 00:47:41,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=24680, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=55650, PETRI_PLACES=337, PETRI_TRANSITIONS=2447} [2023-11-29 00:47:41,973 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 290 predicate places. [2023-11-29 00:47:41,973 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 2447 transitions, 55650 flow [2023-11-29 00:47:41,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.083333333333332) internal successors, (434), 24 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:41,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:47:41,974 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:41,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 00:47:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:42,174 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:47:42,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1488388936, now seen corresponding path program 3 times [2023-11-29 00:47:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13918040] [2023-11-29 00:47:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:47:42,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13918040] [2023-11-29 00:47:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13918040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968306793] [2023-11-29 00:47:42,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:47:42,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:42,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:42,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:47:43,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 00:47:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:43,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:47:43,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 00:47:43,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 00:47:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968306793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:43,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:43,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 36 [2023-11-29 00:47:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287906826] [2023-11-29 00:47:43,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:47:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:47:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1060, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:47:43,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 00:47:43,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 2447 transitions, 55650 flow. Second operand has 38 states, 38 states have (on average 18.05263157894737) internal successors, (686), 38 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:43,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:47:43,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 00:47:43,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:51:30,208 INFO L124 PetriNetUnfolderBase]: 143205/280972 cut-off events. [2023-11-29 00:51:30,208 INFO L125 PetriNetUnfolderBase]: For 2056497/2056497 co-relation queries the response was YES. [2023-11-29 00:51:34,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1065429 conditions, 280972 events. 143205/280972 cut-off events. For 2056497/2056497 co-relation queries the response was YES. Maximal size of possible extension queue 2664. Compared 2935270 event pairs, 39235 based on Foata normal form. 940/281215 useless extension candidates. Maximal degree in co-relation 1044636. Up to 57858 conditions per place. [2023-11-29 00:51:35,442 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 1569 selfloop transitions, 2428 changer transitions 0/4011 dead transitions. [2023-11-29 00:51:35,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 4011 transitions, 87327 flow [2023-11-29 00:51:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 00:51:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 00:51:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1326 transitions. [2023-11-29 00:51:35,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637755102040817 [2023-11-29 00:51:35,446 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 1326 transitions. [2023-11-29 00:51:35,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 1326 transitions. [2023-11-29 00:51:35,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:51:35,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 1326 transitions. [2023-11-29 00:51:35,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 27.625) internal successors, (1326), 48 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:35,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 49.0) internal successors, (2401), 49 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:35,455 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 49.0) internal successors, (2401), 49 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:35,455 INFO L175 Difference]: Start difference. First operand has 337 places, 2447 transitions, 55650 flow. Second operand 48 states and 1326 transitions. [2023-11-29 00:51:35,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 4011 transitions, 87327 flow [2023-11-29 00:53:04,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 4011 transitions, 85204 flow, removed 1059 selfloop flow, removed 3 redundant places. [2023-11-29 00:53:04,382 INFO L231 Difference]: Finished difference. Result has 399 places, 3324 transitions, 83137 flow [2023-11-29 00:53:04,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=53547, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=83137, PETRI_PLACES=399, PETRI_TRANSITIONS=3324} [2023-11-29 00:53:04,384 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 352 predicate places. [2023-11-29 00:53:04,384 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 3324 transitions, 83137 flow [2023-11-29 00:53:04,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 18.05263157894737) internal successors, (686), 38 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:04,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:53:04,385 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:04,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:53:04,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:53:04,585 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-29 00:53:04,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:04,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1177252860, now seen corresponding path program 2 times [2023-11-29 00:53:04,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:04,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629248433] [2023-11-29 00:53:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:04,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:53:05,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629248433] [2023-11-29 00:53:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629248433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492253583] [2023-11-29 00:53:05,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:53:05,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:05,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:05,093 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:05,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6acda93c-7405-4491-86a0-38db1b206300/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:53:05,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:53:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:05,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:53:05,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:53:05,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:53:05,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492253583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:05,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:05,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 34 [2023-11-29 00:53:05,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305783399] [2023-11-29 00:53:05,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:05,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 00:53:05,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 00:53:05,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:53:05,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 00:53:05,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 3324 transitions, 83137 flow. Second operand has 36 states, 36 states have (on average 17.61111111111111) internal successors, (634), 36 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:05,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:53:05,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 00:53:05,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand