./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.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_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/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_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/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_7458736a-f489-4685-8d9a-69ea33631e69/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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:27:37,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:27:37,991 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:27:37,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:27:37,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:27:38,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:27:38,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:27:38,029 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:27:38,029 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:27:38,030 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:27:38,031 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:27:38,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:27:38,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:27:38,034 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:27:38,034 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:27:38,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:27:38,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:27:38,037 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:27:38,037 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:27:38,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:27:38,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:27:38,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:27:38,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:27:38,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:27:38,046 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:27:38,047 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:27:38,047 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:27:38,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:27:38,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:27:38,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:27:38,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:27:38,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:27:38,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:27:38,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:38,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:27:38,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:27:38,054 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:27:38,054 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:27:38,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:27:38,055 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:27:38,055 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:27:38,056 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:27:38,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:27:38,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:27:38,058 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_7458736a-f489-4685-8d9a-69ea33631e69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2023-11-23 22:27:38,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:27:38,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:27:38,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:27:38,422 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:27:38,424 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:27:38,425 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-23 22:27:41,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:27:42,083 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:27:42,085 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/sv-benchmarks/c/pthread/queue_ok_longer.i [2023-11-23 22:27:42,107 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/data/a2222f115/75d9fd889a51422cad83cdafe755736f/FLAGea5455f06 [2023-11-23 22:27:42,124 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/data/a2222f115/75d9fd889a51422cad83cdafe755736f [2023-11-23 22:27:42,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:27:42,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:27:42,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:42,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:27:42,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:27:42,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:42" (1/1) ... [2023-11-23 22:27:42,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b48551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:42, skipping insertion in model container [2023-11-23 22:27:42,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:42" (1/1) ... [2023-11-23 22:27:42,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:27:42,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:42,979 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:27:43,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:43,159 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:27:43,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43 WrapperNode [2023-11-23 22:27:43,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:43,162 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:43,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:27:43,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:27:43,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,277 INFO L138 Inliner]: procedures = 275, calls = 61, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 226 [2023-11-23 22:27:43,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:43,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:27:43,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:27:43,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:27:43,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,311 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,334 INFO L189 HeapSplitter]: Split 36 memory accesses to 6 slices as follows [2, 5, 2, 23, 2, 2] [2023-11-23 22:27:43,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,370 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,372 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:27:43,379 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:27:43,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:27:43,380 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:27:43,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (1/1) ... [2023-11-23 22:27:43,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:43,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:43,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:27:43,488 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-23 22:27:43,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-23 22:27:43,488 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-23 22:27:43,488 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-23 22:27:43,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:27:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:27:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:27:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:27:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:27:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:27:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:27:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:27:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 22:27:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:27:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:27:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:27:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:27:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:27:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 22:27:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:27:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:27:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:27:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:27:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:27:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:27:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:27:43,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 22:27:43,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:27:43,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:27:43,495 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 22:27:43,687 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:27:43,690 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:27:44,199 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:27:44,571 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:27:44,571 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:27:44,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:44 BoogieIcfgContainer [2023-11-23 22:27:44,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:27:44,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:27:44,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:27:44,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:27:44,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:42" (1/3) ... [2023-11-23 22:27:44,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0922aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:44, skipping insertion in model container [2023-11-23 22:27:44,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:43" (2/3) ... [2023-11-23 22:27:44,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0922aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:44, skipping insertion in model container [2023-11-23 22:27:44,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:44" (3/3) ... [2023-11-23 22:27:44,588 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2023-11-23 22:27:44,599 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:27:44,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:27:44,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-23 22:27:44,613 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:27:44,753 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:27:44,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 138 flow [2023-11-23 22:27:44,862 INFO L124 PetriNetUnfolderBase]: 7/60 cut-off events. [2023-11-23 22:27:44,864 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:27:44,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 60 events. 7/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 175 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-23 22:27:44,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 62 transitions, 138 flow [2023-11-23 22:27:44,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 58 transitions, 125 flow [2023-11-23 22:27:44,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:27:44,906 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;@62a491d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:27:44,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-23 22:27:44,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:27:44,918 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-23 22:27:44,918 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:27:44,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:44,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:44,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:44,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1388236445, now seen corresponding path program 1 times [2023-11-23 22:27:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:44,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021075115] [2023-11-23 22:27:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:45,875 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 22:27:45,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:45,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021075115] [2023-11-23 22:27:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021075115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:45,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:27:45,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029893103] [2023-11-23 22:27:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:45,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:27:45,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 22:27:45,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:45,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:27:45,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:46,712 INFO L124 PetriNetUnfolderBase]: 1047/2136 cut-off events. [2023-11-23 22:27:46,713 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-23 22:27:46,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3847 conditions, 2136 events. 1047/2136 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13850 event pairs, 224 based on Foata normal form. 42/1799 useless extension candidates. Maximal degree in co-relation 3596. Up to 1152 conditions per place. [2023-11-23 22:27:46,751 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 83 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2023-11-23 22:27:46,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 110 transitions, 416 flow [2023-11-23 22:27:46,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:27:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:27:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 208 transitions. [2023-11-23 22:27:46,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6709677419354839 [2023-11-23 22:27:46,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 208 transitions. [2023-11-23 22:27:46,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 208 transitions. [2023-11-23 22:27:46,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:46,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 208 transitions. [2023-11-23 22:27:46,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 22:27:46,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 22:27:46,799 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 22:27:46,802 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 125 flow. Second operand 5 states and 208 transitions. [2023-11-23 22:27:46,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 110 transitions, 416 flow [2023-11-23 22:27:46,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 407 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:27:46,822 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 166 flow [2023-11-23 22:27:46,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-23 22:27:46,830 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-11-23 22:27:46,830 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 166 flow [2023-11-23 22:27:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 22:27:46,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:46,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:27:46,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:46,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -711202270, now seen corresponding path program 1 times [2023-11-23 22:27:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007852780] [2023-11-23 22:27:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:46,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:47,298 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 22:27:47,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:47,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007852780] [2023-11-23 22:27:47,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007852780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:47,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:47,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:27:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100203947] [2023-11-23 22:27:47,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:27:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:27:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:27:47,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:27:47,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 22:27:47,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:47,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:27:47,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:47,996 INFO L124 PetriNetUnfolderBase]: 1179/2382 cut-off events. [2023-11-23 22:27:47,996 INFO L125 PetriNetUnfolderBase]: For 335/343 co-relation queries the response was YES. [2023-11-23 22:27:48,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4676 conditions, 2382 events. 1179/2382 cut-off events. For 335/343 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15303 event pairs, 218 based on Foata normal form. 50/2083 useless extension candidates. Maximal degree in co-relation 4318. Up to 1236 conditions per place. [2023-11-23 22:27:48,024 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 110 selfloop transitions, 11 changer transitions 0/142 dead transitions. [2023-11-23 22:27:48,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 142 transitions, 587 flow [2023-11-23 22:27:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:27:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2023-11-23 22:27:48,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566820276497696 [2023-11-23 22:27:48,039 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 285 transitions. [2023-11-23 22:27:48,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 285 transitions. [2023-11-23 22:27:48,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:48,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 285 transitions. [2023-11-23 22:27:48,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 40.714285714285715) internal successors, (285), 7 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 22:27:48,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 22:27:48,053 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 22:27:48,053 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 166 flow. Second operand 7 states and 285 transitions. [2023-11-23 22:27:48,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 142 transitions, 587 flow [2023-11-23 22:27:48,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 142 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:27:48,063 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 235 flow [2023-11-23 22:27:48,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-11-23 22:27:48,066 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 13 predicate places. [2023-11-23 22:27:48,066 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 235 flow [2023-11-23 22:27:48,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 22:27:48,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:48,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:48,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:27:48,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:48,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:48,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1691643503, now seen corresponding path program 1 times [2023-11-23 22:27:48,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:48,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982373854] [2023-11-23 22:27:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:48,191 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 22:27:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982373854] [2023-11-23 22:27:48,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982373854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:48,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:27:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379748505] [2023-11-23 22:27:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:48,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:48,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2023-11-23 22:27:48,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:27:48,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:48,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2023-11-23 22:27:48,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:48,467 INFO L124 PetriNetUnfolderBase]: 548/1241 cut-off events. [2023-11-23 22:27:48,467 INFO L125 PetriNetUnfolderBase]: For 349/349 co-relation queries the response was YES. [2023-11-23 22:27:48,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 1241 events. 548/1241 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7394 event pairs, 313 based on Foata normal form. 30/1155 useless extension candidates. Maximal degree in co-relation 2523. Up to 528 conditions per place. [2023-11-23 22:27:48,479 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 43 selfloop transitions, 2 changer transitions 7/75 dead transitions. [2023-11-23 22:27:48,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 327 flow [2023-11-23 22:27:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-23 22:27:48,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2023-11-23 22:27:48,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-23 22:27:48,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-23 22:27:48,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:48,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-23 22:27:48,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 22:27:48,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:27:48,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:27:48,485 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 235 flow. Second operand 3 states and 122 transitions. [2023-11-23 22:27:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 327 flow [2023-11-23 22:27:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 308 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-23 22:27:48,493 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 185 flow [2023-11-23 22:27:48,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-11-23 22:27:48,494 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-11-23 22:27:48,495 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 185 flow [2023-11-23 22:27:48,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 22:27:48,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:48,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:27:48,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:48,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash -572432247, now seen corresponding path program 1 times [2023-11-23 22:27:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:48,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938260165] [2023-11-23 22:27:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:48,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:48,578 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 22:27:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938260165] [2023-11-23 22:27:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938260165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:48,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:48,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:27:48,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908357472] [2023-11-23 22:27:48,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:48,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:27:48,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 185 flow. Second operand has 4 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 22:27:48,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:48,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:27:48,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:48,860 INFO L124 PetriNetUnfolderBase]: 458/1023 cut-off events. [2023-11-23 22:27:48,861 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-23 22:27:48,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 1023 events. 458/1023 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5490 event pairs, 308 based on Foata normal form. 24/971 useless extension candidates. Maximal degree in co-relation 1961. Up to 626 conditions per place. [2023-11-23 22:27:48,873 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 54 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-23 22:27:48,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 329 flow [2023-11-23 22:27:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:27:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2023-11-23 22:27:48,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2023-11-23 22:27:48,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 152 transitions. [2023-11-23 22:27:48,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 152 transitions. [2023-11-23 22:27:48,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:48,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 152 transitions. [2023-11-23 22:27:48,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 22:27:48,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 22:27:48,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 22:27:48,879 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 185 flow. Second operand 4 states and 152 transitions. [2023-11-23 22:27:48,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 329 flow [2023-11-23 22:27:48,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 78 transitions, 323 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-23 22:27:48,885 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 197 flow [2023-11-23 22:27:48,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2023-11-23 22:27:48,887 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 13 predicate places. [2023-11-23 22:27:48,887 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 197 flow [2023-11-23 22:27:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 22:27:48,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:48,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:27:48,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:48,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:48,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1986709928, now seen corresponding path program 1 times [2023-11-23 22:27:48,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:48,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710259987] [2023-11-23 22:27:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:48,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710259987] [2023-11-23 22:27:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710259987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:27:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380402429] [2023-11-23 22:27:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:49,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:27:49,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:27:49,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:27:49,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2023-11-23 22:27:49,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 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 22:27:49,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:49,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2023-11-23 22:27:49,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:49,627 INFO L124 PetriNetUnfolderBase]: 416/981 cut-off events. [2023-11-23 22:27:49,628 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-23 22:27:49,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 981 events. 416/981 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5290 event pairs, 129 based on Foata normal form. 12/935 useless extension candidates. Maximal degree in co-relation 1524. Up to 483 conditions per place. [2023-11-23 22:27:49,637 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 56 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2023-11-23 22:27:49,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 379 flow [2023-11-23 22:27:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:27:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:27:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2023-11-23 22:27:49,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096774193548387 [2023-11-23 22:27:49,640 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 189 transitions. [2023-11-23 22:27:49,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 189 transitions. [2023-11-23 22:27:49,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:49,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 189 transitions. [2023-11-23 22:27:49,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 22:27:49,643 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 22:27:49,644 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 197 flow. Second operand 5 states and 189 transitions. [2023-11-23 22:27:49,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 379 flow [2023-11-23 22:27:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 88 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:49,648 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 200 flow [2023-11-23 22:27:49,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-11-23 22:27:49,650 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-11-23 22:27:49,650 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 200 flow [2023-11-23 22:27:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 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 22:27:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:49,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:27:49,651 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash -429872346, now seen corresponding path program 1 times [2023-11-23 22:27:49,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:49,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858823027] [2023-11-23 22:27:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:50,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858823027] [2023-11-23 22:27:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858823027] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:50,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626151951] [2023-11-23 22:27:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:50,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:50,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:50,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:50,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:27:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:51,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 22:27:51,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:51,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-11-23 22:27:51,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-11-23 22:27:51,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 104 [2023-11-23 22:27:51,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 52 [2023-11-23 22:27:51,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 58 [2023-11-23 22:27:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:51,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:52,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626151951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:52,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:52,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-23 22:27:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546596896] [2023-11-23 22:27:52,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:27:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:27:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:27:52,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2023-11-23 22:27:52,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 200 flow. Second operand has 17 states, 17 states have (on average 22.41176470588235) internal successors, (381), 17 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 22:27:52,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:52,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2023-11-23 22:27:52,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:54,912 INFO L124 PetriNetUnfolderBase]: 700/1523 cut-off events. [2023-11-23 22:27:54,912 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-23 22:27:54,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1523 events. 700/1523 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8340 event pairs, 135 based on Foata normal form. 24/1439 useless extension candidates. Maximal degree in co-relation 2562. Up to 229 conditions per place. [2023-11-23 22:27:54,927 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 126 selfloop transitions, 14 changer transitions 4/162 dead transitions. [2023-11-23 22:27:54,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 162 transitions, 718 flow [2023-11-23 22:27:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:27:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-23 22:27:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 406 transitions. [2023-11-23 22:27:54,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037220843672456 [2023-11-23 22:27:54,931 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 406 transitions. [2023-11-23 22:27:54,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 406 transitions. [2023-11-23 22:27:54,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:54,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 406 transitions. [2023-11-23 22:27:54,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 31.23076923076923) internal successors, (406), 13 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 22:27:54,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 22:27:54,937 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 22:27:54,937 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 200 flow. Second operand 13 states and 406 transitions. [2023-11-23 22:27:54,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 162 transitions, 718 flow [2023-11-23 22:27:54,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 162 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-23 22:27:54,946 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 237 flow [2023-11-23 22:27:54,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=237, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-11-23 22:27:54,950 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2023-11-23 22:27:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 237 flow [2023-11-23 22:27:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.41176470588235) internal successors, (381), 17 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 22:27:54,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:54,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:54,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:55,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 22:27:55,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:55,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash -441140196, now seen corresponding path program 1 times [2023-11-23 22:27:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:55,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124653100] [2023-11-23 22:27:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:55,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:55,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:55,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124653100] [2023-11-23 22:27:55,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124653100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:55,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997484209] [2023-11-23 22:27:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:55,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:55,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:55,998 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:56,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:27:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:56,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 22:27:56,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:56,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-11-23 22:27:56,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-11-23 22:27:56,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 104 [2023-11-23 22:27:56,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 52 [2023-11-23 22:27:56,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-11-23 22:27:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:56,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:56,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997484209] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:56,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:56,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-23 22:27:56,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304596186] [2023-11-23 22:27:56,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:56,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 22:27:56,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 22:27:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:27:57,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2023-11-23 22:27:57,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 237 flow. Second operand has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 22:27:57,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:57,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2023-11-23 22:27:57,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:58,964 INFO L124 PetriNetUnfolderBase]: 1129/2532 cut-off events. [2023-11-23 22:27:58,964 INFO L125 PetriNetUnfolderBase]: For 862/862 co-relation queries the response was YES. [2023-11-23 22:27:58,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5658 conditions, 2532 events. 1129/2532 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 15831 event pairs, 183 based on Foata normal form. 36/2390 useless extension candidates. Maximal degree in co-relation 4622. Up to 610 conditions per place. [2023-11-23 22:27:58,987 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 170 selfloop transitions, 19 changer transitions 4/212 dead transitions. [2023-11-23 22:27:58,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 212 transitions, 1014 flow [2023-11-23 22:27:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:27:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-23 22:27:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 510 transitions. [2023-11-23 22:27:58,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2023-11-23 22:27:58,991 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 510 transitions. [2023-11-23 22:27:58,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 510 transitions. [2023-11-23 22:27:58,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:58,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 510 transitions. [2023-11-23 22:27:58,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 34.0) internal successors, (510), 15 states have internal predecessors, (510), 0 states have call successors, (0), 0 states 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 22:27:58,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 62.0) internal successors, (992), 16 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 22:27:58,997 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 62.0) internal successors, (992), 16 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 22:27:58,997 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 237 flow. Second operand 15 states and 510 transitions. [2023-11-23 22:27:58,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 212 transitions, 1014 flow [2023-11-23 22:27:59,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 212 transitions, 965 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-11-23 22:27:59,006 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 305 flow [2023-11-23 22:27:59,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=305, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2023-11-23 22:27:59,007 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2023-11-23 22:27:59,008 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 305 flow [2023-11-23 22:27:59,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.0) internal successors, (437), 19 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 22:27:59,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:59,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:59,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 22:27:59,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:27:59,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1266054527, now seen corresponding path program 1 times [2023-11-23 22:27:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487000897] [2023-11-23 22:27:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:59,872 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 22:27:59,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:59,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487000897] [2023-11-23 22:27:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487000897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:59,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831013771] [2023-11-23 22:27:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:59,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:59,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:59,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:59,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:28:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:00,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 22:28:00,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:00,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-11-23 22:28:00,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-11-23 22:28:00,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 89 [2023-11-23 22:28:00,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2023-11-23 22:28:00,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 57 [2023-11-23 22:28:00,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 54 [2023-11-23 22:28:00,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2023-11-23 22:28:00,472 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 22:28:00,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:00,808 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 22:28:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831013771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:00,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-11-23 22:28:00,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105310164] [2023-11-23 22:28:00,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:00,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 22:28:00,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:28:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:28:00,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 62 [2023-11-23 22:28:00,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 305 flow. Second operand has 21 states, 21 states have (on average 24.238095238095237) internal successors, (509), 21 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 22:28:00,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:00,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 62 [2023-11-23 22:28:00,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:03,317 INFO L124 PetriNetUnfolderBase]: 1783/3972 cut-off events. [2023-11-23 22:28:03,318 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2023-11-23 22:28:03,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3972 events. 1783/3972 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 26566 event pairs, 255 based on Foata normal form. 48/3806 useless extension candidates. Maximal degree in co-relation 7586. Up to 687 conditions per place. [2023-11-23 22:28:03,350 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 217 selfloop transitions, 40 changer transitions 4/280 dead transitions. [2023-11-23 22:28:03,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 280 transitions, 1378 flow [2023-11-23 22:28:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 22:28:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-23 22:28:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 735 transitions. [2023-11-23 22:28:03,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388563049853372 [2023-11-23 22:28:03,355 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 735 transitions. [2023-11-23 22:28:03,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 735 transitions. [2023-11-23 22:28:03,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:03,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 735 transitions. [2023-11-23 22:28:03,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 33.40909090909091) internal successors, (735), 22 states have internal predecessors, (735), 0 states have call successors, (0), 0 states 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 22:28:03,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states 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 22:28:03,362 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states 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 22:28:03,362 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 305 flow. Second operand 22 states and 735 transitions. [2023-11-23 22:28:03,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 280 transitions, 1378 flow [2023-11-23 22:28:03,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 280 transitions, 1353 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-23 22:28:03,373 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 536 flow [2023-11-23 22:28:03,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=536, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-11-23 22:28:03,374 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 53 predicate places. [2023-11-23 22:28:03,374 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 536 flow [2023-11-23 22:28:03,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 24.238095238095237) internal successors, (509), 21 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 22:28:03,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:03,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:03,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:28:03,595 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:28:03,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 592986316, now seen corresponding path program 1 times [2023-11-23 22:28:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:03,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228908677] [2023-11-23 22:28:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:03,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:03,697 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 22:28:03,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:03,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228908677] [2023-11-23 22:28:03,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228908677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:03,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819108669] [2023-11-23 22:28:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:03,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:03,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:03,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:03,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:28:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:03,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:28:03,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:03,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:28:03,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819108669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:03,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:28:03,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 22:28:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851988997] [2023-11-23 22:28:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:03,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:28:03,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:03,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:28:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:28:03,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:28:03,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 22:28:03,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:03,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:28:03,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:04,508 INFO L124 PetriNetUnfolderBase]: 1693/3806 cut-off events. [2023-11-23 22:28:04,508 INFO L125 PetriNetUnfolderBase]: For 2730/2730 co-relation queries the response was YES. [2023-11-23 22:28:04,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9445 conditions, 3806 events. 1693/3806 cut-off events. For 2730/2730 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 25477 event pairs, 282 based on Foata normal form. 72/3592 useless extension candidates. Maximal degree in co-relation 9138. Up to 2313 conditions per place. [2023-11-23 22:28:04,542 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 92 selfloop transitions, 10 changer transitions 4/129 dead transitions. [2023-11-23 22:28:04,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 817 flow [2023-11-23 22:28:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:28:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:28:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 212 transitions. [2023-11-23 22:28:04,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2023-11-23 22:28:04,544 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 212 transitions. [2023-11-23 22:28:04,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 212 transitions. [2023-11-23 22:28:04,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:04,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 212 transitions. [2023-11-23 22:28:04,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.333333333333336) internal successors, (212), 6 states have internal predecessors, (212), 0 states have call successors, (0), 0 states 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 22:28:04,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:04,547 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:04,547 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 536 flow. Second operand 6 states and 212 transitions. [2023-11-23 22:28:04,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 817 flow [2023-11-23 22:28:04,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 129 transitions, 776 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-11-23 22:28:04,564 INFO L231 Difference]: Finished difference. Result has 108 places, 97 transitions, 511 flow [2023-11-23 22:28:04,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=511, PETRI_PLACES=108, PETRI_TRANSITIONS=97} [2023-11-23 22:28:04,565 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 50 predicate places. [2023-11-23 22:28:04,565 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 97 transitions, 511 flow [2023-11-23 22:28:04,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 22:28:04,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:04,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:04,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:04,787 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:28:04,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash 592985322, now seen corresponding path program 1 times [2023-11-23 22:28:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:04,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024265298] [2023-11-23 22:28:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:05,437 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 22:28:05,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:05,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024265298] [2023-11-23 22:28:05,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024265298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026165140] [2023-11-23 22:28:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:05,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:05,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:05,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:05,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:28:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:05,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 22:28:05,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:05,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-11-23 22:28:05,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-11-23 22:28:05,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 89 [2023-11-23 22:28:05,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2023-11-23 22:28:05,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 68 [2023-11-23 22:28:05,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 77 [2023-11-23 22:28:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2023-11-23 22:28:06,189 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 22:28:06,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:06,587 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 22:28:06,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026165140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:06,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:06,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-11-23 22:28:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831800468] [2023-11-23 22:28:06,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 22:28:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:28:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-11-23 22:28:06,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:28:06,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 97 transitions, 511 flow. Second operand has 21 states, 21 states have (on average 25.095238095238095) internal successors, (527), 21 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 22:28:06,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:06,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:28:06,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:09,875 INFO L124 PetriNetUnfolderBase]: 2077/4702 cut-off events. [2023-11-23 22:28:09,875 INFO L125 PetriNetUnfolderBase]: For 3588/3588 co-relation queries the response was YES. [2023-11-23 22:28:09,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11625 conditions, 4702 events. 2077/4702 cut-off events. For 3588/3588 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 32925 event pairs, 303 based on Foata normal form. 72/4512 useless extension candidates. Maximal degree in co-relation 11169. Up to 687 conditions per place. [2023-11-23 22:28:09,914 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 248 selfloop transitions, 49 changer transitions 4/321 dead transitions. [2023-11-23 22:28:09,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 321 transitions, 1736 flow [2023-11-23 22:28:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 22:28:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-23 22:28:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 860 transitions. [2023-11-23 22:28:09,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548387096774193 [2023-11-23 22:28:09,919 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 860 transitions. [2023-11-23 22:28:09,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 860 transitions. [2023-11-23 22:28:09,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:09,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 860 transitions. [2023-11-23 22:28:09,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 34.4) internal successors, (860), 25 states have internal predecessors, (860), 0 states have call successors, (0), 0 states 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 22:28:09,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 62.0) internal successors, (1612), 26 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states 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 22:28:09,930 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 62.0) internal successors, (1612), 26 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states 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 22:28:09,930 INFO L175 Difference]: Start difference. First operand has 108 places, 97 transitions, 511 flow. Second operand 25 states and 860 transitions. [2023-11-23 22:28:09,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 321 transitions, 1736 flow [2023-11-23 22:28:09,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 321 transitions, 1713 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-23 22:28:09,961 INFO L231 Difference]: Finished difference. Result has 130 places, 110 transitions, 717 flow [2023-11-23 22:28:09,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=717, PETRI_PLACES=130, PETRI_TRANSITIONS=110} [2023-11-23 22:28:09,963 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 72 predicate places. [2023-11-23 22:28:09,963 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 110 transitions, 717 flow [2023-11-23 22:28:09,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 25.095238095238095) internal successors, (527), 21 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 22:28:09,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:09,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:09,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:10,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:28:10,185 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:28:10,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1202707265, now seen corresponding path program 1 times [2023-11-23 22:28:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667642647] [2023-11-23 22:28:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:28:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667642647] [2023-11-23 22:28:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667642647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:10,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:28:10,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:28:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538682562] [2023-11-23 22:28:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:10,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:28:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:28:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:28:10,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:28:10,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 110 transitions, 717 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:10,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:10,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:28:10,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:11,038 INFO L124 PetriNetUnfolderBase]: 2017/4546 cut-off events. [2023-11-23 22:28:11,039 INFO L125 PetriNetUnfolderBase]: For 4862/4862 co-relation queries the response was YES. [2023-11-23 22:28:11,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 4546 events. 2017/4546 cut-off events. For 4862/4862 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 31540 event pairs, 1071 based on Foata normal form. 96/4376 useless extension candidates. Maximal degree in co-relation 11414. Up to 2169 conditions per place. [2023-11-23 22:28:11,069 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 80 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2023-11-23 22:28:11,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 123 transitions, 945 flow [2023-11-23 22:28:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:28:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:28:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2023-11-23 22:28:11,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725806451612904 [2023-11-23 22:28:11,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 142 transitions. [2023-11-23 22:28:11,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 142 transitions. [2023-11-23 22:28:11,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:11,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 142 transitions. [2023-11-23 22:28:11,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states 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 22:28:11,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 22:28:11,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 22:28:11,073 INFO L175 Difference]: Start difference. First operand has 130 places, 110 transitions, 717 flow. Second operand 4 states and 142 transitions. [2023-11-23 22:28:11,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 123 transitions, 945 flow [2023-11-23 22:28:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 123 transitions, 857 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-11-23 22:28:11,097 INFO L231 Difference]: Finished difference. Result has 118 places, 109 transitions, 665 flow [2023-11-23 22:28:11,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=665, PETRI_PLACES=118, PETRI_TRANSITIONS=109} [2023-11-23 22:28:11,098 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 60 predicate places. [2023-11-23 22:28:11,098 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 109 transitions, 665 flow [2023-11-23 22:28:11,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:11,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:11,099 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, 1, 1, 1, 1] [2023-11-23 22:28:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:28:11,099 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:28:11,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:11,102 INFO L85 PathProgramCache]: Analyzing trace with hash -353145708, now seen corresponding path program 1 times [2023-11-23 22:28:11,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:11,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609916693] [2023-11-23 22:28:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:11,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:11,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609916693] [2023-11-23 22:28:11,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609916693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:11,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022393332] [2023-11-23 22:28:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:11,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:11,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:28:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:11,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:28:11,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:11,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 22:28:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:11,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:28:11,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022393332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:28:11,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:28:11,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 22:28:11,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519214432] [2023-11-23 22:28:11,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:28:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:28:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:28:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:28:11,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2023-11-23 22:28:11,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 109 transitions, 665 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 22:28:11,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:11,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2023-11-23 22:28:11,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:11,915 INFO L124 PetriNetUnfolderBase]: 1487/3706 cut-off events. [2023-11-23 22:28:11,915 INFO L125 PetriNetUnfolderBase]: For 3257/3257 co-relation queries the response was YES. [2023-11-23 22:28:11,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9443 conditions, 3706 events. 1487/3706 cut-off events. For 3257/3257 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 25254 event pairs, 315 based on Foata normal form. 132/3646 useless extension candidates. Maximal degree in co-relation 9129. Up to 2144 conditions per place. [2023-11-23 22:28:11,939 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 91 selfloop transitions, 4 changer transitions 0/118 dead transitions. [2023-11-23 22:28:11,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 118 transitions, 876 flow [2023-11-23 22:28:11,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:28:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:28:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2023-11-23 22:28:11,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2023-11-23 22:28:11,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 120 transitions. [2023-11-23 22:28:11,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 120 transitions. [2023-11-23 22:28:11,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:11,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 120 transitions. [2023-11-23 22:28:11,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.0) internal successors, (120), 3 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 22:28:11,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:28:11,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 22:28:11,943 INFO L175 Difference]: Start difference. First operand has 118 places, 109 transitions, 665 flow. Second operand 3 states and 120 transitions. [2023-11-23 22:28:11,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 118 transitions, 876 flow [2023-11-23 22:28:11,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 848 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:28:11,959 INFO L231 Difference]: Finished difference. Result has 118 places, 109 transitions, 645 flow [2023-11-23 22:28:11,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=645, PETRI_PLACES=118, PETRI_TRANSITIONS=109} [2023-11-23 22:28:11,960 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 60 predicate places. [2023-11-23 22:28:11,960 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 109 transitions, 645 flow [2023-11-23 22:28:11,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 22:28:11,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:11,961 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, 1, 1, 1, 1, 1] [2023-11-23 22:28:11,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:12,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:12,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:28:12,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:12,182 INFO L85 PathProgramCache]: Analyzing trace with hash -555500807, now seen corresponding path program 1 times [2023-11-23 22:28:12,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:12,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673121117] [2023-11-23 22:28:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:12,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673121117] [2023-11-23 22:28:12,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673121117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:12,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820611643] [2023-11-23 22:28:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:12,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:12,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:28:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:12,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:28:12,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:12,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:12,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820611643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:12,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:12,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-23 22:28:12,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149732813] [2023-11-23 22:28:12,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:12,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 22:28:12,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 22:28:12,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-23 22:28:12,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-23 22:28:12,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 109 transitions, 645 flow. Second operand has 10 states, 10 states have (on average 26.5) internal successors, (265), 10 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 22:28:12,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:12,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-23 22:28:12,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:13,165 INFO L124 PetriNetUnfolderBase]: 1353/3292 cut-off events. [2023-11-23 22:28:13,165 INFO L125 PetriNetUnfolderBase]: For 3298/3298 co-relation queries the response was YES. [2023-11-23 22:28:13,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8768 conditions, 3292 events. 1353/3292 cut-off events. For 3298/3298 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 22065 event pairs, 667 based on Foata normal form. 30/3144 useless extension candidates. Maximal degree in co-relation 8463. Up to 1421 conditions per place. [2023-11-23 22:28:13,185 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 98 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2023-11-23 22:28:13,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 135 transitions, 937 flow [2023-11-23 22:28:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:28:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:28:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 236 transitions. [2023-11-23 22:28:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543778801843318 [2023-11-23 22:28:13,188 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 236 transitions. [2023-11-23 22:28:13,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 236 transitions. [2023-11-23 22:28:13,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:13,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 236 transitions. [2023-11-23 22:28:13,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.714285714285715) internal successors, (236), 7 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 22:28:13,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 22:28:13,198 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 22:28:13,198 INFO L175 Difference]: Start difference. First operand has 118 places, 109 transitions, 645 flow. Second operand 7 states and 236 transitions. [2023-11-23 22:28:13,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 135 transitions, 937 flow [2023-11-23 22:28:13,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 933 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:28:13,215 INFO L231 Difference]: Finished difference. Result has 126 places, 110 transitions, 706 flow [2023-11-23 22:28:13,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=706, PETRI_PLACES=126, PETRI_TRANSITIONS=110} [2023-11-23 22:28:13,218 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2023-11-23 22:28:13,218 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 110 transitions, 706 flow [2023-11-23 22:28:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.5) internal successors, (265), 10 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 22:28:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:13,219 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:28:13,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:13,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:13,436 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-23 22:28:13,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1097226554, now seen corresponding path program 1 times [2023-11-23 22:28:13,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:13,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130633731] [2023-11-23 22:28:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:13,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:15,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130633731] [2023-11-23 22:28:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130633731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898586927] [2023-11-23 22:28:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:15,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:15,313 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:15,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7458736a-f489-4685-8d9a-69ea33631e69/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:28:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:15,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-23 22:28:15,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:15,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-11-23 22:28:15,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-11-23 22:28:15,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 89 [2023-11-23 22:28:15,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2023-11-23 22:28:15,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 68 [2023-11-23 22:28:16,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 450 treesize of output 393 [2023-11-23 22:28:16,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 138 [2023-11-23 22:28:17,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 229 [2023-11-23 22:28:19,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1552 treesize of output 1330 [2023-11-23 22:28:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:19,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898586927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:23,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:23,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 35 [2023-11-23 22:28:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594801588] [2023-11-23 22:28:23,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 22:28:23,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:23,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 22:28:23,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1005, Unknown=1, NotChecked=0, Total=1260 [2023-11-23 22:28:24,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2023-11-23 22:28:24,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 110 transitions, 706 flow. Second operand has 36 states, 36 states have (on average 22.88888888888889) internal successors, (824), 36 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 22:28:24,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:24,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2023-11-23 22:28:24,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand