./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ --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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:40:31,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:40:32,020 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:40:32,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:40:32,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:40:32,053 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:40:32,054 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:40:32,055 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:40:32,055 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:40:32,056 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:40:32,057 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:40:32,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:40:32,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:40:32,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:40:32,059 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:40:32,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:40:32,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:40:32,061 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:40:32,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:40:32,062 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:40:32,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:40:32,067 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:40:32,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:40:32,068 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:40:32,068 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:40:32,069 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:40:32,069 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:40:32,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:40:32,070 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:40:32,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:40:32,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:40:32,072 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:40:32,073 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:40:32,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:40:32,074 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:40:32,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:40:32,080 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:40:32,080 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:40:32,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:40:32,081 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:40:32,081 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:40:32,083 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:40:32,083 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:40:32,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:40:32,084 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_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-23 22:40:32,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:40:32,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:40:32,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:40:32,473 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:40:32,473 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:40:32,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-23 22:40:35,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:40:35,858 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:40:35,858 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/sv-benchmarks/c/pthread/stack-2.i [2023-11-23 22:40:35,878 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/data/96cb180c5/30c96320419a4897b629f8403c77347f/FLAG992b553e2 [2023-11-23 22:40:36,167 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/data/96cb180c5/30c96320419a4897b629f8403c77347f [2023-11-23 22:40:36,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:40:36,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:40:36,182 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:40:36,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:40:36,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:40:36,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:40:36" (1/1) ... [2023-11-23 22:40:36,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be7ed68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:36, skipping insertion in model container [2023-11-23 22:40:36,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:40:36" (1/1) ... [2023-11-23 22:40:36,267 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:40:36,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:40:36,867 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:40:36,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:40:37,035 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:40:37,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37 WrapperNode [2023-11-23 22:40:37,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:40:37,038 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:40:37,038 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:40:37,038 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:40:37,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,141 INFO L138 Inliner]: procedures = 278, calls = 47, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 179 [2023-11-23 22:40:37,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:40:37,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:40:37,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:40:37,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:40:37,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,169 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,191 INFO L189 HeapSplitter]: Split 18 memory accesses to 5 slices as follows [2, 5, 2, 2, 7] [2023-11-23 22:40:37,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:40:37,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:40:37,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:40:37,246 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:40:37,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (1/1) ... [2023-11-23 22:40:37,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:40:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:37,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:40:37,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:40:37,332 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-23 22:40:37,332 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-23 22:40:37,332 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-23 22:40:37,332 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-23 22:40:37,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:40:37,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:40:37,333 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:40:37,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:40:37,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:40:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:40:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:40:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:40:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:40:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:40:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:40:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:40:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:40:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:40:37,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:40:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:40:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:40:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:40:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:40:37,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:40:37,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:40:37,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:40:37,342 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:40:37,550 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:40:37,553 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:40:37,842 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:40:38,171 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:40:38,172 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:40:38,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:40:38 BoogieIcfgContainer [2023-11-23 22:40:38,172 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:40:38,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:40:38,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:40:38,184 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:40:38,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:40:36" (1/3) ... [2023-11-23 22:40:38,185 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff30089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:40:38, skipping insertion in model container [2023-11-23 22:40:38,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:40:37" (2/3) ... [2023-11-23 22:40:38,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff30089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:40:38, skipping insertion in model container [2023-11-23 22:40:38,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:40:38" (3/3) ... [2023-11-23 22:40:38,189 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-23 22:40:38,200 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:40:38,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:40:38,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 22:40:38,211 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:40:38,305 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:40:38,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2023-11-23 22:40:38,403 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-11-23 22:40:38,403 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:40:38,408 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 7. 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. [2023-11-23 22:40:38,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2023-11-23 22:40:38,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 99 flow [2023-11-23 22:40:38,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:40:38,451 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;@5808afa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:40:38,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-23 22:40:38,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:40:38,466 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-11-23 22:40:38,470 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:40:38,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:38,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:38,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:38,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:38,479 INFO L85 PathProgramCache]: Analyzing trace with hash -934362570, now seen corresponding path program 1 times [2023-11-23 22:40:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302329251] [2023-11-23 22:40:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:38,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:38,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302329251] [2023-11-23 22:40:38,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302329251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:38,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:38,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:40:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867300598] [2023-11-23 22:40:38,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:38,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:38,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:40:38,972 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) [2023-11-23 22:40:38,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:38,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:40:38,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:39,423 INFO L124 PetriNetUnfolderBase]: 737/1456 cut-off events. [2023-11-23 22:40:39,424 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-23 22:40:39,431 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 67. Compared 8064 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. [2023-11-23 22:40:39,447 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 73 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-11-23 22:40:39,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 93 transitions, 362 flow [2023-11-23 22:40:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:40:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2023-11-23 22:40:39,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693877551020408 [2023-11-23 22:40:39,464 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 164 transitions. [2023-11-23 22:40:39,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 164 transitions. [2023-11-23 22:40:39,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:39,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 164 transitions. [2023-11-23 22:40:39,474 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) [2023-11-23 22:40:39,480 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) [2023-11-23 22:40:39,480 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) [2023-11-23 22:40:39,482 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 5 states and 164 transitions. [2023-11-23 22:40:39,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 93 transitions, 362 flow [2023-11-23 22:40:39,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 93 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:40:39,494 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 142 flow [2023-11-23 22:40:39,496 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} [2023-11-23 22:40:39,499 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-23 22:40:39,499 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 142 flow [2023-11-23 22:40:39,499 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) [2023-11-23 22:40:39,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:39,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:39,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:40:39,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:39,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:39,501 INFO L85 PathProgramCache]: Analyzing trace with hash 257188861, now seen corresponding path program 1 times [2023-11-23 22:40:39,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:39,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388918756] [2023-11-23 22:40:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:39,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:39,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:39,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388918756] [2023-11-23 22:40:39,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388918756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:39,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:39,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:40:39,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936744387] [2023-11-23 22:40:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:39,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:39,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:39,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:39,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:40:39,709 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) [2023-11-23 22:40:39,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:39,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:40:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:39,997 INFO L124 PetriNetUnfolderBase]: 604/1241 cut-off events. [2023-11-23 22:40:39,997 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-23 22:40:40,001 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 6732 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. [2023-11-23 22:40:40,010 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 65 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2023-11-23 22:40:40,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 366 flow [2023-11-23 22:40:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:40:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:40:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2023-11-23 22:40:40,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2023-11-23 22:40:40,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 163 transitions. [2023-11-23 22:40:40,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 163 transitions. [2023-11-23 22:40:40,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:40,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 163 transitions. [2023-11-23 22:40:40,015 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) [2023-11-23 22:40:40,017 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) [2023-11-23 22:40:40,017 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) [2023-11-23 22:40:40,017 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 142 flow. Second operand 5 states and 163 transitions. [2023-11-23 22:40:40,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 366 flow [2023-11-23 22:40:40,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 362 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-23 22:40:40,025 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 162 flow [2023-11-23 22:40:40,025 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} [2023-11-23 22:40:40,026 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-11-23 22:40:40,026 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 162 flow [2023-11-23 22:40:40,027 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) [2023-11-23 22:40:40,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:40,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:40,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:40:40,027 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:40,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash -617111179, now seen corresponding path program 1 times [2023-11-23 22:40:40,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:40,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824916814] [2023-11-23 22:40:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:40,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:40,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:40,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824916814] [2023-11-23 22:40:40,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824916814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:40,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:40,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:40:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303436471] [2023-11-23 22:40:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:40,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:40,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:40:40,118 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) [2023-11-23 22:40:40,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:40,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:40:40,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:40,596 INFO L124 PetriNetUnfolderBase]: 1140/2287 cut-off events. [2023-11-23 22:40:40,596 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-11-23 22:40:40,605 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 13373 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. [2023-11-23 22:40:40,622 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 79 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-23 22:40:40,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 96 transitions, 480 flow [2023-11-23 22:40:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-23 22:40:40,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2023-11-23 22:40:40,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-23 22:40:40,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-23 22:40:40,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:40,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-23 22:40:40,634 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) [2023-11-23 22:40:40,636 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) [2023-11-23 22:40:40,636 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) [2023-11-23 22:40:40,636 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 162 flow. Second operand 4 states and 135 transitions. [2023-11-23 22:40:40,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 96 transitions, 480 flow [2023-11-23 22:40:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:40:40,672 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 186 flow [2023-11-23 22:40:40,672 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} [2023-11-23 22:40:40,673 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2023-11-23 22:40:40,673 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 186 flow [2023-11-23 22:40:40,674 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) [2023-11-23 22:40:40,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:40,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:40,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:40:40,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:40,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1115197879, now seen corresponding path program 1 times [2023-11-23 22:40:40,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:40,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545071771] [2023-11-23 22:40:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:40,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:40,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:40,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545071771] [2023-11-23 22:40:40,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545071771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:40,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:40,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:40:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654944613] [2023-11-23 22:40:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:40,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:40:40,849 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) [2023-11-23 22:40:40,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:40,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:40:40,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:41,412 INFO L124 PetriNetUnfolderBase]: 1401/2628 cut-off events. [2023-11-23 22:40:41,413 INFO L125 PetriNetUnfolderBase]: For 1250/1294 co-relation queries the response was YES. [2023-11-23 22:40:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2628 events. 1401/2628 cut-off events. For 1250/1294 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15076 event pairs, 537 based on Foata normal form. 76/2589 useless extension candidates. Maximal degree in co-relation 4950. Up to 1445 conditions per place. [2023-11-23 22:40:41,439 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 78 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-11-23 22:40:41,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 506 flow [2023-11-23 22:40:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-23 22:40:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-23 22:40:41,442 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-23 22:40:41,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-23 22:40:41,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:41,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-23 22:40:41,443 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) [2023-11-23 22:40:41,444 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) [2023-11-23 22:40:41,444 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) [2023-11-23 22:40:41,445 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 186 flow. Second operand 4 states and 134 transitions. [2023-11-23 22:40:41,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 506 flow [2023-11-23 22:40:41,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:40:41,451 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 208 flow [2023-11-23 22:40:41,451 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} [2023-11-23 22:40:41,452 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-11-23 22:40:41,453 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 208 flow [2023-11-23 22:40:41,453 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) [2023-11-23 22:40:41,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:41,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:41,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:40:41,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:41,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1217159900, now seen corresponding path program 1 times [2023-11-23 22:40:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39168691] [2023-11-23 22:40:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39168691] [2023-11-23 22:40:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39168691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:40:41,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800326141] [2023-11-23 22:40:41,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:41,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:40:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:40:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:40:41,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:40:41,562 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) [2023-11-23 22:40:41,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:41,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:40:41,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:41,867 INFO L124 PetriNetUnfolderBase]: 695/1544 cut-off events. [2023-11-23 22:40:41,867 INFO L125 PetriNetUnfolderBase]: For 840/906 co-relation queries the response was YES. [2023-11-23 22:40:41,873 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 8520 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. [2023-11-23 22:40:41,885 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 50 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-23 22:40:41,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 369 flow [2023-11-23 22:40:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:40:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:40:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-23 22:40:41,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-23 22:40:41,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-23 22:40:41,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-23 22:40:41,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:41,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-23 22:40:41,889 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) [2023-11-23 22:40:41,890 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) [2023-11-23 22:40:41,890 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) [2023-11-23 22:40:41,890 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 208 flow. Second operand 3 states and 98 transitions. [2023-11-23 22:40:41,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 369 flow [2023-11-23 22:40:41,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 359 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:41,899 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 194 flow [2023-11-23 22:40:41,900 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} [2023-11-23 22:40:41,901 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2023-11-23 22:40:41,901 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 194 flow [2023-11-23 22:40:41,902 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) [2023-11-23 22:40:41,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:41,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:41,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:40:41,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:41,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:41,904 INFO L85 PathProgramCache]: Analyzing trace with hash -984839171, now seen corresponding path program 1 times [2023-11-23 22:40:41,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:41,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431750199] [2023-11-23 22:40:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:41,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:42,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:42,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431750199] [2023-11-23 22:40:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431750199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107353997] [2023-11-23 22:40:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:42,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:42,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:42,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:40:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:42,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:40:42,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:42,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107353997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:42,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 22:40:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385166666] [2023-11-23 22:40:42,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:42,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:42,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:40:42,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:40:42,359 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) [2023-11-23 22:40:42,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:42,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:40:42,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:42,916 INFO L124 PetriNetUnfolderBase]: 1128/2392 cut-off events. [2023-11-23 22:40:42,916 INFO L125 PetriNetUnfolderBase]: For 1211/1327 co-relation queries the response was YES. [2023-11-23 22:40:42,926 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 14065 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. [2023-11-23 22:40:42,945 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 97 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2023-11-23 22:40:42,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 119 transitions, 649 flow [2023-11-23 22:40:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:40:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:40:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2023-11-23 22:40:42,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2023-11-23 22:40:42,948 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 202 transitions. [2023-11-23 22:40:42,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 202 transitions. [2023-11-23 22:40:42,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:42,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 202 transitions. [2023-11-23 22:40:42,950 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) [2023-11-23 22:40:42,951 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) [2023-11-23 22:40:42,952 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) [2023-11-23 22:40:42,952 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 194 flow. Second operand 7 states and 202 transitions. [2023-11-23 22:40:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 119 transitions, 649 flow [2023-11-23 22:40:42,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 119 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:40:42,961 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 247 flow [2023-11-23 22:40:42,961 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} [2023-11-23 22:40:42,962 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 25 predicate places. [2023-11-23 22:40:42,962 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 247 flow [2023-11-23 22:40:42,963 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) [2023-11-23 22:40:42,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:42,963 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] [2023-11-23 22:40:42,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:40:43,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:43,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1868332703, now seen corresponding path program 1 times [2023-11-23 22:40:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:43,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35140369] [2023-11-23 22:40:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:43,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:43,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35140369] [2023-11-23 22:40:43,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35140369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:43,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:43,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:43,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991133371] [2023-11-23 22:40:43,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:43,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:43,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-23 22:40:43,357 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) [2023-11-23 22:40:43,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:43,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-23 22:40:43,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:44,105 INFO L124 PetriNetUnfolderBase]: 1656/3378 cut-off events. [2023-11-23 22:40:44,105 INFO L125 PetriNetUnfolderBase]: For 2451/2667 co-relation queries the response was YES. [2023-11-23 22:40:44,114 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 20953 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. [2023-11-23 22:40:44,136 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 108 selfloop transitions, 9 changer transitions 0/129 dead transitions. [2023-11-23 22:40:44,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 747 flow [2023-11-23 22:40:44,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:40:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:40:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2023-11-23 22:40:44,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2023-11-23 22:40:44,139 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 195 transitions. [2023-11-23 22:40:44,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 195 transitions. [2023-11-23 22:40:44,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:44,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 195 transitions. [2023-11-23 22:40:44,140 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) [2023-11-23 22:40:44,141 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) [2023-11-23 22:40:44,142 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) [2023-11-23 22:40:44,142 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 247 flow. Second operand 7 states and 195 transitions. [2023-11-23 22:40:44,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 747 flow [2023-11-23 22:40:44,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 739 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:44,153 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 308 flow [2023-11-23 22:40:44,154 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} [2023-11-23 22:40:44,154 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-11-23 22:40:44,155 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 308 flow [2023-11-23 22:40:44,155 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) [2023-11-23 22:40:44,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:44,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:44,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:40:44,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:44,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 628033035, now seen corresponding path program 1 times [2023-11-23 22:40:44,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:44,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447408048] [2023-11-23 22:40:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:44,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447408048] [2023-11-23 22:40:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447408048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:44,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652914702] [2023-11-23 22:40:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:44,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:44,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:44,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:40:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:44,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:40:44,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:44,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652914702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:44,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:44,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-23 22:40:44,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192512886] [2023-11-23 22:40:44,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:44,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:44,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:44,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:40:44,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:40:44,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:44,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:44,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:40:44,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:45,155 INFO L124 PetriNetUnfolderBase]: 1823/3568 cut-off events. [2023-11-23 22:40:45,155 INFO L125 PetriNetUnfolderBase]: For 3554/3760 co-relation queries the response was YES. [2023-11-23 22:40:45,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9659 conditions, 3568 events. 1823/3568 cut-off events. For 3554/3760 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 21745 event pairs, 172 based on Foata normal form. 82/3567 useless extension candidates. Maximal degree in co-relation 8068. Up to 1789 conditions per place. [2023-11-23 22:40:45,200 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 85 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-11-23 22:40:45,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 724 flow [2023-11-23 22:40:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-23 22:40:45,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-23 22:40:45,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-23 22:40:45,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-23 22:40:45,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:45,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-23 22:40:45,204 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) [2023-11-23 22:40:45,205 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) [2023-11-23 22:40:45,206 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) [2023-11-23 22:40:45,206 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 308 flow. Second operand 4 states and 120 transitions. [2023-11-23 22:40:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 724 flow [2023-11-23 22:40:45,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 712 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:45,227 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 308 flow [2023-11-23 22:40:45,227 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=4, PETRI_FLOW=308, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2023-11-23 22:40:45,231 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-11-23 22:40:45,231 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 308 flow [2023-11-23 22:40:45,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:45,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:45,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:45,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:45,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:40:45,455 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:45,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -465242723, now seen corresponding path program 1 times [2023-11-23 22:40:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:45,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613212904] [2023-11-23 22:40:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613212904] [2023-11-23 22:40:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613212904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:45,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079363569] [2023-11-23 22:40:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:45,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:45,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:45,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:40:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:45,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:40:45,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:45,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:40:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079363569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:40:45,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:40:45,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-23 22:40:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026778235] [2023-11-23 22:40:45,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:40:45,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:40:45,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:40:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:40:45,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:40:45,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 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) [2023-11-23 22:40:45,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:45,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:40:45,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:47,149 INFO L124 PetriNetUnfolderBase]: 2514/5254 cut-off events. [2023-11-23 22:40:47,149 INFO L125 PetriNetUnfolderBase]: For 6684/6910 co-relation queries the response was YES. [2023-11-23 22:40:47,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14729 conditions, 5254 events. 2514/5254 cut-off events. For 6684/6910 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 33742 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. [2023-11-23 22:40:47,195 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 169 selfloop transitions, 18 changer transitions 0/201 dead transitions. [2023-11-23 22:40:47,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 201 transitions, 1324 flow [2023-11-23 22:40:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:40:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-23 22:40:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 336 transitions. [2023-11-23 22:40:47,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2023-11-23 22:40:47,198 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 336 transitions. [2023-11-23 22:40:47,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 336 transitions. [2023-11-23 22:40:47,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:47,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 336 transitions. [2023-11-23 22:40:47,200 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) [2023-11-23 22:40:47,202 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) [2023-11-23 22:40:47,204 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) [2023-11-23 22:40:47,204 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 308 flow. Second operand 11 states and 336 transitions. [2023-11-23 22:40:47,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 201 transitions, 1324 flow [2023-11-23 22:40:47,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 201 transitions, 1226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:40:47,227 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 456 flow [2023-11-23 22:40:47,227 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=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=456, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-11-23 22:40:47,228 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 43 predicate places. [2023-11-23 22:40:47,228 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 456 flow [2023-11-23 22:40:47,229 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) [2023-11-23 22:40:47,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:47,230 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] [2023-11-23 22:40:47,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:47,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 22:40:47,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:47,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1534468745, now seen corresponding path program 1 times [2023-11-23 22:40:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441780218] [2023-11-23 22:40:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:47,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441780218] [2023-11-23 22:40:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441780218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:47,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:47,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:40:47,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759193976] [2023-11-23 22:40:47,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:47,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:40:47,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:40:47,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:40:47,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-23 22:40:47,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 456 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) [2023-11-23 22:40:47,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:47,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-23 22:40:47,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:48,835 INFO L124 PetriNetUnfolderBase]: 2885/5772 cut-off events. [2023-11-23 22:40:48,835 INFO L125 PetriNetUnfolderBase]: For 7846/8178 co-relation queries the response was YES. [2023-11-23 22:40:48,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16206 conditions, 5772 events. 2885/5772 cut-off events. For 7846/8178 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 36406 event pairs, 684 based on Foata normal form. 42/5787 useless extension candidates. Maximal degree in co-relation 13813. Up to 3409 conditions per place. [2023-11-23 22:40:48,884 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 116 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2023-11-23 22:40:48,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 137 transitions, 945 flow [2023-11-23 22:40:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:40:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:40:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2023-11-23 22:40:48,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-23 22:40:48,889 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 196 transitions. [2023-11-23 22:40:48,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 196 transitions. [2023-11-23 22:40:48,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:48,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 196 transitions. [2023-11-23 22:40:48,890 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) [2023-11-23 22:40:48,891 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) [2023-11-23 22:40:48,892 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) [2023-11-23 22:40:48,892 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 456 flow. Second operand 7 states and 196 transitions. [2023-11-23 22:40:48,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 137 transitions, 945 flow [2023-11-23 22:40:48,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 931 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:48,921 INFO L231 Difference]: Finished difference. Result has 97 places, 78 transitions, 519 flow [2023-11-23 22:40:48,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=88, 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=519, PETRI_PLACES=97, PETRI_TRANSITIONS=78} [2023-11-23 22:40:48,922 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 50 predicate places. [2023-11-23 22:40:48,923 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 78 transitions, 519 flow [2023-11-23 22:40:48,923 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) [2023-11-23 22:40:48,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:48,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:48,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:40:48,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:48,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2005811863, now seen corresponding path program 1 times [2023-11-23 22:40:48,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:48,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691615641] [2023-11-23 22:40:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:48,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:40:48,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:48,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691615641] [2023-11-23 22:40:48,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691615641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:48,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:48,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:40:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558245586] [2023-11-23 22:40:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:48,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:48,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:48,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:48,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:40:48,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 78 transitions, 519 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) [2023-11-23 22:40:48,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:48,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:40:48,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:50,061 INFO L124 PetriNetUnfolderBase]: 2959/6098 cut-off events. [2023-11-23 22:40:50,061 INFO L125 PetriNetUnfolderBase]: For 9183/9417 co-relation queries the response was YES. [2023-11-23 22:40:50,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17108 conditions, 6098 events. 2959/6098 cut-off events. For 9183/9417 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 40356 event pairs, 507 based on Foata normal form. 0/6097 useless extension candidates. Maximal degree in co-relation 15264. Up to 2960 conditions per place. [2023-11-23 22:40:50,116 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 120 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-11-23 22:40:50,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 1269 flow [2023-11-23 22:40:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-23 22:40:50,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-23 22:40:50,118 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-23 22:40:50,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-23 22:40:50,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:50,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-23 22:40:50,120 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) [2023-11-23 22:40:50,121 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) [2023-11-23 22:40:50,121 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) [2023-11-23 22:40:50,122 INFO L175 Difference]: Start difference. First operand has 97 places, 78 transitions, 519 flow. Second operand 4 states and 120 transitions. [2023-11-23 22:40:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 1269 flow [2023-11-23 22:40:50,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1251 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:50,275 INFO L231 Difference]: Finished difference. Result has 98 places, 78 transitions, 527 flow [2023-11-23 22:40:50,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=94, 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=527, PETRI_PLACES=98, PETRI_TRANSITIONS=78} [2023-11-23 22:40:50,276 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 51 predicate places. [2023-11-23 22:40:50,276 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 78 transitions, 527 flow [2023-11-23 22:40:50,276 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) [2023-11-23 22:40:50,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:50,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 22:40:50,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:40:50,277 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:50,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1470912286, now seen corresponding path program 1 times [2023-11-23 22:40:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19999664] [2023-11-23 22:40:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:50,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:50,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:50,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19999664] [2023-11-23 22:40:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19999664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:50,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353603174] [2023-11-23 22:40:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:50,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:50,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:50,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:50,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:40:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:50,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:40:50,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:50,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353603174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:50,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-23 22:40:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712069224] [2023-11-23 22:40:50,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:50,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:40:50,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:40:50,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:40:50,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:40:50,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 78 transitions, 527 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:50,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:50,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:40:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:51,936 INFO L124 PetriNetUnfolderBase]: 3353/6382 cut-off events. [2023-11-23 22:40:51,937 INFO L125 PetriNetUnfolderBase]: For 12025/12055 co-relation queries the response was YES. [2023-11-23 22:40:51,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19420 conditions, 6382 events. 3353/6382 cut-off events. For 12025/12055 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 40132 event pairs, 1027 based on Foata normal form. 178/6377 useless extension candidates. Maximal degree in co-relation 18542. Up to 3807 conditions per place. [2023-11-23 22:40:52,004 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 96 selfloop transitions, 5 changer transitions 0/116 dead transitions. [2023-11-23 22:40:52,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 116 transitions, 962 flow [2023-11-23 22:40:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-23 22:40:52,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2023-11-23 22:40:52,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-23 22:40:52,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-23 22:40:52,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:52,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-23 22:40:52,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:52,010 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) [2023-11-23 22:40:52,010 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) [2023-11-23 22:40:52,011 INFO L175 Difference]: Start difference. First operand has 98 places, 78 transitions, 527 flow. Second operand 4 states and 118 transitions. [2023-11-23 22:40:52,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 116 transitions, 962 flow [2023-11-23 22:40:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 116 transitions, 940 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:52,063 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 525 flow [2023-11-23 22:40:52,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=515, 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=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=525, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-11-23 22:40:52,064 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 51 predicate places. [2023-11-23 22:40:52,064 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 525 flow [2023-11-23 22:40:52,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:52,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:52,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-23 22:40:52,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:52,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:40:52,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:52,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1646359902, now seen corresponding path program 1 times [2023-11-23 22:40:52,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:52,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876435099] [2023-11-23 22:40:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:52,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:40:52,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:52,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876435099] [2023-11-23 22:40:52,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876435099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:52,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:52,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:40:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970794513] [2023-11-23 22:40:52,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:52,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:40:52,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:40:52,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 525 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) [2023-11-23 22:40:52,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:52,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:40:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:53,338 INFO L124 PetriNetUnfolderBase]: 3065/6051 cut-off events. [2023-11-23 22:40:53,338 INFO L125 PetriNetUnfolderBase]: For 10595/10595 co-relation queries the response was YES. [2023-11-23 22:40:53,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18237 conditions, 6051 events. 3065/6051 cut-off events. For 10595/10595 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 38319 event pairs, 765 based on Foata normal form. 178/6198 useless extension candidates. Maximal degree in co-relation 15208. Up to 2729 conditions per place. [2023-11-23 22:40:53,382 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 108 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-11-23 22:40:53,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 129 transitions, 1089 flow [2023-11-23 22:40:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-23 22:40:53,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-23 22:40:53,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-23 22:40:53,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-23 22:40:53,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:53,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-23 22:40:53,385 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) [2023-11-23 22:40:53,386 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) [2023-11-23 22:40:53,386 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) [2023-11-23 22:40:53,387 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 525 flow. Second operand 4 states and 120 transitions. [2023-11-23 22:40:53,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 129 transitions, 1089 flow [2023-11-23 22:40:53,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 129 transitions, 1079 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:40:53,441 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 531 flow [2023-11-23 22:40:53,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=94, 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=531, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2023-11-23 22:40:53,442 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 51 predicate places. [2023-11-23 22:40:53,442 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 531 flow [2023-11-23 22:40:53,442 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) [2023-11-23 22:40:53,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:53,443 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] [2023-11-23 22:40:53,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:40:53,443 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:53,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:53,444 INFO L85 PathProgramCache]: Analyzing trace with hash 718444905, now seen corresponding path program 1 times [2023-11-23 22:40:53,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:53,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945747015] [2023-11-23 22:40:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:53,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:53,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:53,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945747015] [2023-11-23 22:40:53,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945747015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:53,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459760694] [2023-11-23 22:40:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:53,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:53,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:53,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:53,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:40:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:53,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:40:53,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:53,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459760694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:53,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:53,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-23 22:40:53,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122009661] [2023-11-23 22:40:53,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:40:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:40:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:40:53,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:40:53,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 531 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) [2023-11-23 22:40:53,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:40:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:54,669 INFO L124 PetriNetUnfolderBase]: 2712/5512 cut-off events. [2023-11-23 22:40:54,669 INFO L125 PetriNetUnfolderBase]: For 10929/10929 co-relation queries the response was YES. [2023-11-23 22:40:54,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17014 conditions, 5512 events. 2712/5512 cut-off events. For 10929/10929 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 35477 event pairs, 2030 based on Foata normal form. 24/5487 useless extension candidates. Maximal degree in co-relation 15154. Up to 4187 conditions per place. [2023-11-23 22:40:54,722 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 56 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2023-11-23 22:40:54,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 85 transitions, 705 flow [2023-11-23 22:40:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:54,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2023-11-23 22:40:54,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2023-11-23 22:40:54,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 102 transitions. [2023-11-23 22:40:54,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 102 transitions. [2023-11-23 22:40:54,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:54,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 102 transitions. [2023-11-23 22:40:54,725 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) [2023-11-23 22:40:54,726 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) [2023-11-23 22:40:54,726 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) [2023-11-23 22:40:54,727 INFO L175 Difference]: Start difference. First operand has 98 places, 77 transitions, 531 flow. Second operand 4 states and 102 transitions. [2023-11-23 22:40:54,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 85 transitions, 705 flow [2023-11-23 22:40:54,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 85 transitions, 695 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:54,772 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 543 flow [2023-11-23 22:40:54,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=94, 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=543, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2023-11-23 22:40:54,773 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 50 predicate places. [2023-11-23 22:40:54,773 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 543 flow [2023-11-23 22:40:54,774 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) [2023-11-23 22:40:54,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:54,774 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] [2023-11-23 22:40:54,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-23 22:40:54,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:40:54,991 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:54,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -727600144, now seen corresponding path program 1 times [2023-11-23 22:40:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289213675] [2023-11-23 22:40:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:55,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:55,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289213675] [2023-11-23 22:40:55,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289213675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212128657] [2023-11-23 22:40:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:55,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:55,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:55,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:55,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:40:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:55,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:40:55,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:55,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:40:55,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212128657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:55,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:40:55,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-23 22:40:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688750085] [2023-11-23 22:40:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:55,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:40:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:40:55,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:40:55,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-23 22:40:55,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 543 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) [2023-11-23 22:40:55,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:55,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-23 22:40:55,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:56,838 INFO L124 PetriNetUnfolderBase]: 3321/6442 cut-off events. [2023-11-23 22:40:56,839 INFO L125 PetriNetUnfolderBase]: For 12732/12732 co-relation queries the response was YES. [2023-11-23 22:40:56,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19778 conditions, 6442 events. 3321/6442 cut-off events. For 12732/12732 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 40348 event pairs, 612 based on Foata normal form. 70/6479 useless extension candidates. Maximal degree in co-relation 16796. Up to 2613 conditions per place. [2023-11-23 22:40:56,887 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 161 selfloop transitions, 30 changer transitions 0/201 dead transitions. [2023-11-23 22:40:56,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 201 transitions, 1486 flow [2023-11-23 22:40:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:40:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:40:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2023-11-23 22:40:56,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-11-23 22:40:56,899 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 314 transitions. [2023-11-23 22:40:56,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 314 transitions. [2023-11-23 22:40:56,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:56,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 314 transitions. [2023-11-23 22:40:56,902 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) [2023-11-23 22:40:56,907 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) [2023-11-23 22:40:56,908 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) [2023-11-23 22:40:56,908 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 543 flow. Second operand 12 states and 314 transitions. [2023-11-23 22:40:56,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 201 transitions, 1486 flow [2023-11-23 22:40:56,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 201 transitions, 1446 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-23 22:40:56,958 INFO L231 Difference]: Finished difference. Result has 108 places, 88 transitions, 714 flow [2023-11-23 22:40:56,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=94, 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=714, PETRI_PLACES=108, PETRI_TRANSITIONS=88} [2023-11-23 22:40:56,959 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 61 predicate places. [2023-11-23 22:40:56,959 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 88 transitions, 714 flow [2023-11-23 22:40:56,959 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) [2023-11-23 22:40:56,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:56,960 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] [2023-11-23 22:40:56,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:57,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:40:57,175 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:40:57,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1572395190, now seen corresponding path program 1 times [2023-11-23 22:40:57,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:57,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773062080] [2023-11-23 22:40:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:57,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:57,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:57,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773062080] [2023-11-23 22:40:57,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773062080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:57,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300216393] [2023-11-23 22:40:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:57,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:57,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:57,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:57,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:40:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:57,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:40:57,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:57,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:40:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:57,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300216393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:40:57,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:40:57,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-23 22:40:57,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193543982] [2023-11-23 22:40:57,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:40:57,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:40:57,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:40:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:40:57,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-23 22:40:57,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 88 transitions, 714 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) [2023-11-23 22:40:57,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:57,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-23 22:40:57,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:41:00,127 INFO L124 PetriNetUnfolderBase]: 4968/9470 cut-off events. [2023-11-23 22:41:00,127 INFO L125 PetriNetUnfolderBase]: For 19577/19577 co-relation queries the response was YES. [2023-11-23 22:41:00,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29506 conditions, 9470 events. 4968/9470 cut-off events. For 19577/19577 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 61576 event pairs, 728 based on Foata normal form. 80/9519 useless extension candidates. Maximal degree in co-relation 26222. Up to 3638 conditions per place. [2023-11-23 22:41:00,233 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 254 selfloop transitions, 67 changer transitions 0/330 dead transitions. [2023-11-23 22:41:00,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 330 transitions, 2523 flow [2023-11-23 22:41:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 22:41:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-23 22:41:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 557 transitions. [2023-11-23 22:41:00,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736394557823129 [2023-11-23 22:41:00,241 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 557 transitions. [2023-11-23 22:41:00,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 557 transitions. [2023-11-23 22:41:00,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:41:00,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 557 transitions. [2023-11-23 22:41:00,249 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) [2023-11-23 22:41:00,255 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) [2023-11-23 22:41:00,256 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) [2023-11-23 22:41:00,257 INFO L175 Difference]: Start difference. First operand has 108 places, 88 transitions, 714 flow. Second operand 24 states and 557 transitions. [2023-11-23 22:41:00,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 330 transitions, 2523 flow [2023-11-23 22:41:00,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 330 transitions, 2469 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-23 22:41:00,355 INFO L231 Difference]: Finished difference. Result has 133 places, 126 transitions, 1234 flow [2023-11-23 22:41:00,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=105, 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=1234, PETRI_PLACES=133, PETRI_TRANSITIONS=126} [2023-11-23 22:41:00,356 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 86 predicate places. [2023-11-23 22:41:00,357 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 126 transitions, 1234 flow [2023-11-23 22:41:00,357 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) [2023-11-23 22:41:00,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:41:00,358 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] [2023-11-23 22:41:00,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:00,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:41:00,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:41:00,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash -537448960, now seen corresponding path program 1 times [2023-11-23 22:41:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:00,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511449711] [2023-11-23 22:41:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:00,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:00,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511449711] [2023-11-23 22:41:00,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511449711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:41:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998212350] [2023-11-23 22:41:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:00,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:00,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:00,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:00,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:41:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:00,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:41:00,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:01,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:01,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998212350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:01,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:41:01,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-23 22:41:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617559287] [2023-11-23 22:41:01,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:01,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:41:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:41:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:41:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-23 22:41:01,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 126 transitions, 1234 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) [2023-11-23 22:41:01,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:41:01,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-23 22:41:01,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:41:04,324 INFO L124 PetriNetUnfolderBase]: 6149/12080 cut-off events. [2023-11-23 22:41:04,325 INFO L125 PetriNetUnfolderBase]: For 34562/34562 co-relation queries the response was YES. [2023-11-23 22:41:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37480 conditions, 12080 events. 6149/12080 cut-off events. For 34562/34562 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 82982 event pairs, 1408 based on Foata normal form. 462/12503 useless extension candidates. Maximal degree in co-relation 34428. Up to 3236 conditions per place. [2023-11-23 22:41:04,420 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 200 selfloop transitions, 104 changer transitions 0/315 dead transitions. [2023-11-23 22:41:04,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 315 transitions, 2782 flow [2023-11-23 22:41:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:41:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-23 22:41:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 436 transitions. [2023-11-23 22:41:04,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234093637454982 [2023-11-23 22:41:04,422 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 436 transitions. [2023-11-23 22:41:04,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 436 transitions. [2023-11-23 22:41:04,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:41:04,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 436 transitions. [2023-11-23 22:41:04,425 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) [2023-11-23 22:41:04,427 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) [2023-11-23 22:41:04,428 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) [2023-11-23 22:41:04,428 INFO L175 Difference]: Start difference. First operand has 133 places, 126 transitions, 1234 flow. Second operand 17 states and 436 transitions. [2023-11-23 22:41:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 315 transitions, 2782 flow [2023-11-23 22:41:04,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 315 transitions, 2533 flow, removed 110 selfloop flow, removed 5 redundant places. [2023-11-23 22:41:04,543 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1555 flow [2023-11-23 22:41:04,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=120, 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=1555, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2023-11-23 22:41:04,544 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 92 predicate places. [2023-11-23 22:41:04,545 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1555 flow [2023-11-23 22:41:04,545 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) [2023-11-23 22:41:04,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:41:04,545 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-23 22:41:04,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:04,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 22:41:04,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:41:04,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:04,767 INFO L85 PathProgramCache]: Analyzing trace with hash 155585348, now seen corresponding path program 2 times [2023-11-23 22:41:04,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:04,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038614917] [2023-11-23 22:41:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:04,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:05,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:05,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038614917] [2023-11-23 22:41:05,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038614917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:41:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068724720] [2023-11-23 22:41:05,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:41:05,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:05,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:05,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:05,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:41:05,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:41:05,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:41:05,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:41:05,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:05,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:05,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068724720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:05,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:41:05,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-23 22:41:05,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279212803] [2023-11-23 22:41:05,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:05,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 22:41:05,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:41:05,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:41:05,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-23 22:41:05,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1555 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) [2023-11-23 22:41:05,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:41:05,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-23 22:41:05,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:41:09,171 INFO L124 PetriNetUnfolderBase]: 8834/17366 cut-off events. [2023-11-23 22:41:09,171 INFO L125 PetriNetUnfolderBase]: For 50730/50730 co-relation queries the response was YES. [2023-11-23 22:41:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55454 conditions, 17366 events. 8834/17366 cut-off events. For 50730/50730 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 119513 event pairs, 2688 based on Foata normal form. 144/17441 useless extension candidates. Maximal degree in co-relation 50451. Up to 7569 conditions per place. [2023-11-23 22:41:09,321 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 436 selfloop transitions, 49 changer transitions 0/499 dead transitions. [2023-11-23 22:41:09,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 499 transitions, 4273 flow [2023-11-23 22:41:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 22:41:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-23 22:41:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 706 transitions. [2023-11-23 22:41:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549165120593692 [2023-11-23 22:41:09,325 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 706 transitions. [2023-11-23 22:41:09,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 706 transitions. [2023-11-23 22:41:09,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:41:09,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 706 transitions. [2023-11-23 22:41:09,328 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) [2023-11-23 22:41:09,331 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) [2023-11-23 22:41:09,332 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) [2023-11-23 22:41:09,332 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1555 flow. Second operand 22 states and 706 transitions. [2023-11-23 22:41:09,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 499 transitions, 4273 flow [2023-11-23 22:41:09,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 499 transitions, 4083 flow, removed 83 selfloop flow, removed 4 redundant places. [2023-11-23 22:41:09,522 INFO L231 Difference]: Finished difference. Result has 162 places, 180 transitions, 1940 flow [2023-11-23 22:41:09,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=135, 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=1940, PETRI_PLACES=162, PETRI_TRANSITIONS=180} [2023-11-23 22:41:09,523 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 115 predicate places. [2023-11-23 22:41:09,523 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 180 transitions, 1940 flow [2023-11-23 22:41:09,523 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) [2023-11-23 22:41:09,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:41:09,524 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] [2023-11-23 22:41:09,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:41:09,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:41:09,728 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:41:09,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash -371089977, now seen corresponding path program 1 times [2023-11-23 22:41:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85094847] [2023-11-23 22:41:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:41:09,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85094847] [2023-11-23 22:41:09,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85094847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:41:09,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490263437] [2023-11-23 22:41:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:09,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:09,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:10,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:41:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:10,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:41:10,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:41:10,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 22:41:10,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490263437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:10,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:41:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-11-23 22:41:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940266824] [2023-11-23 22:41:10,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:10,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 22:41:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 22:41:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:41:10,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-23 22:41:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 180 transitions, 1940 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) [2023-11-23 22:41:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:41:10,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-23 22:41:10,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:41:16,766 INFO L124 PetriNetUnfolderBase]: 13698/26822 cut-off events. [2023-11-23 22:41:16,766 INFO L125 PetriNetUnfolderBase]: For 68062/68062 co-relation queries the response was YES. [2023-11-23 22:41:16,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83521 conditions, 26822 events. 13698/26822 cut-off events. For 68062/68062 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 201219 event pairs, 2183 based on Foata normal form. 192/26932 useless extension candidates. Maximal degree in co-relation 80221. Up to 5837 conditions per place. [2023-11-23 22:41:17,014 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 365 selfloop transitions, 192 changer transitions 0/568 dead transitions. [2023-11-23 22:41:17,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 568 transitions, 5301 flow [2023-11-23 22:41:17,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 22:41:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-23 22:41:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 676 transitions. [2023-11-23 22:41:17,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2023-11-23 22:41:17,017 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 676 transitions. [2023-11-23 22:41:17,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 676 transitions. [2023-11-23 22:41:17,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:41:17,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 676 transitions. [2023-11-23 22:41:17,020 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) [2023-11-23 22:41:17,023 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) [2023-11-23 22:41:17,024 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) [2023-11-23 22:41:17,025 INFO L175 Difference]: Start difference. First operand has 162 places, 180 transitions, 1940 flow. Second operand 26 states and 676 transitions. [2023-11-23 22:41:17,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 568 transitions, 5301 flow [2023-11-23 22:41:17,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 568 transitions, 5204 flow, removed 25 selfloop flow, removed 6 redundant places. [2023-11-23 22:41:17,339 INFO L231 Difference]: Finished difference. Result has 191 places, 293 transitions, 3771 flow [2023-11-23 22:41:17,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=156, 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=3771, PETRI_PLACES=191, PETRI_TRANSITIONS=293} [2023-11-23 22:41:17,340 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 144 predicate places. [2023-11-23 22:41:17,340 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 293 transitions, 3771 flow [2023-11-23 22:41:17,341 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) [2023-11-23 22:41:17,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:41:17,341 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] [2023-11-23 22:41:17,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-23 22:41:17,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:17,563 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-23 22:41:17,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:41:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1253337083, now seen corresponding path program 2 times [2023-11-23 22:41:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:41:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653024601] [2023-11-23 22:41:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:41:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:41:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:41:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:18,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:41:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653024601] [2023-11-23 22:41:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653024601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:41:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343571002] [2023-11-23 22:41:18,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:41:18,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:41:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:41:18,099 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:41:18,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00718863-78cd-4ccf-a61d-14980d5fe776/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:41:18,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:41:18,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:41:18,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:41:18,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:41:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:18,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:41:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:41:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343571002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:41:18,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:41:18,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-23 22:41:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360980166] [2023-11-23 22:41:18,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:41:18,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 22:41:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:41:18,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 22:41:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-23 22:41:18,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-23 22:41:18,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 293 transitions, 3771 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) [2023-11-23 22:41:18,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:41:18,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-23 22:41:18,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand