./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme --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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:56:32,912 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:56:33,011 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:56:33,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:56:33,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:56:33,049 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:56:33,051 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:56:33,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:56:33,053 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:56:33,053 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:56:33,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:56:33,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:56:33,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:56:33,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:56:33,058 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:56:33,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:56:33,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:56:33,061 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:56:33,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:56:33,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:56:33,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:56:33,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:56:33,066 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:56:33,067 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:56:33,067 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:56:33,068 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:56:33,069 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:56:33,070 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:56:33,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:56:33,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:56:33,072 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:56:33,073 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:56:33,074 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:56:33,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:33,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:56:33,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:56:33,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:56:33,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:56:33,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:56:33,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:56:33,081 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:56:33,082 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:56:33,082 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:56:33,083 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:56:33,084 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-26 11:56:33,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:56:33,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:56:33,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:56:33,524 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:56:33,524 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:56:33,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-26 11:56:36,754 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:56:37,021 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:56:37,022 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-26 11:56:37,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/data/f0e5c33c7/79f7c8568c3043c1a4191bffe99b31aa/FLAG351869bce [2023-11-26 11:56:37,050 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/data/f0e5c33c7/79f7c8568c3043c1a4191bffe99b31aa [2023-11-26 11:56:37,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:56:37,055 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:56:37,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:37,057 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:56:37,063 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:56:37,064 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,066 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e6897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37, skipping insertion in model container [2023-11-26 11:56:37,066 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,096 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:56:37,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:37,340 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:56:37,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:56:37,389 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:56:37,389 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:56:37,396 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:56:37,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37 WrapperNode [2023-11-26 11:56:37,397 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:56:37,398 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:37,398 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:56:37,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:56:37,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,419 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,452 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 169 [2023-11-26 11:56:37,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:56:37,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:56:37,454 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:56:37,454 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:56:37,469 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,474 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,496 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 4, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:56:37,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:56:37,535 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:56:37,536 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:56:37,536 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:56:37,537 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (1/1) ... [2023-11-26 11:56:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:56:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:37,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:56:37,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:56:37,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:56:37,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:56:37,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:56:37,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:56:37,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:56:37,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:56:37,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:56:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:56:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:56:37,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:56:37,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:56:37,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:56:37,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:56:37,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:56:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:56:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:56:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:56:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:56:37,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:56:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:56:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:56:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:56:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:56:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:56:37,630 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:56:37,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:56:37,842 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:56:38,318 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:56:38,597 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:56:38,598 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:56:38,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:38 BoogieIcfgContainer [2023-11-26 11:56:38,599 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:56:38,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:56:38,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:56:38,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:56:38,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:56:37" (1/3) ... [2023-11-26 11:56:38,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a3958a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:38, skipping insertion in model container [2023-11-26 11:56:38,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:56:37" (2/3) ... [2023-11-26 11:56:38,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a3958a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:56:38, skipping insertion in model container [2023-11-26 11:56:38,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:56:38" (3/3) ... [2023-11-26 11:56:38,615 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-26 11:56:38,627 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:56:38,641 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:56:38,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-26 11:56:38,642 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:56:38,765 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:56:38,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2023-11-26 11:56:38,895 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2023-11-26 11:56:38,895 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:56:38,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 5/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-26 11:56:38,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2023-11-26 11:56:38,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 44 transitions, 97 flow [2023-11-26 11:56:38,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:56:38,951 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;@4833f7c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:56:38,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-26 11:56:38,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:56:38,959 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-26 11:56:38,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:56:38,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:38,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:56:38,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:38,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash 479404, now seen corresponding path program 1 times [2023-11-26 11:56:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:38,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396232907] [2023-11-26 11:56:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:39,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:39,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396232907] [2023-11-26 11:56:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396232907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:39,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:39,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:56:39,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20635099] [2023-11-26 11:56:39,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:56:39,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:39,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:39,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:39,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:39,850 INFO L124 PetriNetUnfolderBase]: 219/427 cut-off events. [2023-11-26 11:56:39,850 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-26 11:56:39,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 427 events. 219/427 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2264 event pairs, 192 based on Foata normal form. 13/326 useless extension candidates. Maximal degree in co-relation 688. Up to 378 conditions per place. [2023-11-26 11:56:39,861 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 28 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-26 11:56:39,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 165 flow [2023-11-26 11:56:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-26 11:56:39,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2023-11-26 11:56:39,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-26 11:56:39,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-26 11:56:39,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:39,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-26 11:56:39,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2023-11-26 11:56:39,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,899 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,901 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 4 states and 99 transitions. [2023-11-26 11:56:39,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 165 flow [2023-11-26 11:56:39,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:56:39,923 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 119 flow [2023-11-26 11:56:39,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-26 11:56:39,931 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-26 11:56:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 119 flow [2023-11-26 11:56:39,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:39,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:39,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-26 11:56:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:56:39,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:39,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1397499197, now seen corresponding path program 1 times [2023-11-26 11:56:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:39,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375717802] [2023-11-26 11:56:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:40,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375717802] [2023-11-26 11:56:40,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375717802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054600897] [2023-11-26 11:56:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:40,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:40,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:40,186 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:40,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:56:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:40,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:56:40,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:40,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054600897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:40,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:56:40,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 11:56:40,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974121599] [2023-11-26 11:56:40,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:40,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:56:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:56:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:56:40,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:40,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:40,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:40,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:40,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:40,682 INFO L124 PetriNetUnfolderBase]: 219/426 cut-off events. [2023-11-26 11:56:40,683 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-26 11:56:40,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 426 events. 219/426 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2247 event pairs, 192 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 804. Up to 373 conditions per place. [2023-11-26 11:56:40,694 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-11-26 11:56:40,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 177 flow [2023-11-26 11:56:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:56:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:56:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2023-11-26 11:56:40,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-26 11:56:40,702 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 128 transitions. [2023-11-26 11:56:40,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 128 transitions. [2023-11-26 11:56:40,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:40,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 128 transitions. [2023-11-26 11:56:40,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:40,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:40,707 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:40,707 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 119 flow. Second operand 6 states and 128 transitions. [2023-11-26 11:56:40,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 177 flow [2023-11-26 11:56:40,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:40,710 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 126 flow [2023-11-26 11:56:40,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-26 11:56:40,711 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2023-11-26 11:56:40,714 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 126 flow [2023-11-26 11:56:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:40,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:40,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 11:56:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:40,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:40,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:40,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash 372802627, now seen corresponding path program 1 times [2023-11-26 11:56:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499054516] [2023-11-26 11:56:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:41,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499054516] [2023-11-26 11:56:41,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499054516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:41,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166861990] [2023-11-26 11:56:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:41,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:41,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:41,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:56:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:41,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:56:41,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:41,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166861990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:41,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:41,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 11:56:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070908819] [2023-11-26 11:56:41,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:56:41,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:56:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:56:41,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:41,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 126 flow. Second operand has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:41,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:41,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:41,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:41,592 INFO L124 PetriNetUnfolderBase]: 222/438 cut-off events. [2023-11-26 11:56:41,592 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-26 11:56:41,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 438 events. 222/438 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2354 event pairs, 192 based on Foata normal form. 3/326 useless extension candidates. Maximal degree in co-relation 805. Up to 380 conditions per place. [2023-11-26 11:56:41,598 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-11-26 11:56:41,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 260 flow [2023-11-26 11:56:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:56:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:56:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2023-11-26 11:56:41,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2023-11-26 11:56:41,606 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 203 transitions. [2023-11-26 11:56:41,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 203 transitions. [2023-11-26 11:56:41,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:41,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 203 transitions. [2023-11-26 11:56:41,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:41,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:41,614 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:41,614 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 126 flow. Second operand 10 states and 203 transitions. [2023-11-26 11:56:41,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 260 flow [2023-11-26 11:56:41,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 214 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-26 11:56:41,620 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 178 flow [2023-11-26 11:56:41,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2023-11-26 11:56:41,622 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-11-26 11:56:41,622 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 178 flow [2023-11-26 11:56:41,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:41,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:41,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:41,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:41,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:41,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:41,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:41,831 INFO L85 PathProgramCache]: Analyzing trace with hash 438715959, now seen corresponding path program 1 times [2023-11-26 11:56:41,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:41,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543169938] [2023-11-26 11:56:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:41,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:41,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543169938] [2023-11-26 11:56:41,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543169938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:41,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:41,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:56:41,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398846608] [2023-11-26 11:56:41,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:41,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:41,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:41,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:41,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:42,101 INFO L124 PetriNetUnfolderBase]: 261/525 cut-off events. [2023-11-26 11:56:42,101 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-26 11:56:42,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 525 events. 261/525 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2782 event pairs, 153 based on Foata normal form. 28/408 useless extension candidates. Maximal degree in co-relation 999. Up to 318 conditions per place. [2023-11-26 11:56:42,107 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 54 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-26 11:56:42,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 322 flow [2023-11-26 11:56:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-26 11:56:42,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2023-11-26 11:56:42,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-26 11:56:42,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-26 11:56:42,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:42,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-26 11:56:42,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,112 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 178 flow. Second operand 3 states and 93 transitions. [2023-11-26 11:56:42,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 322 flow [2023-11-26 11:56:42,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 311 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:42,116 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 169 flow [2023-11-26 11:56:42,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-26 11:56:42,117 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-11-26 11:56:42,118 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 169 flow [2023-11-26 11:56:42,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:42,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:42,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:56:42,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:42,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash 715293339, now seen corresponding path program 1 times [2023-11-26 11:56:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:42,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956252609] [2023-11-26 11:56:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:42,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956252609] [2023-11-26 11:56:42,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956252609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:42,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:42,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620118544] [2023-11-26 11:56:42,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:42,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:56:42,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-26 11:56:42,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:42,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-26 11:56:42,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:42,412 INFO L124 PetriNetUnfolderBase]: 248/502 cut-off events. [2023-11-26 11:56:42,412 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-26 11:56:42,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 502 events. 248/502 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2753 event pairs, 219 based on Foata normal form. 16/430 useless extension candidates. Maximal degree in co-relation 1023. Up to 384 conditions per place. [2023-11-26 11:56:42,418 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 36 selfloop transitions, 2 changer transitions 12/64 dead transitions. [2023-11-26 11:56:42,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 295 flow [2023-11-26 11:56:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-26 11:56:42,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2023-11-26 11:56:42,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-26 11:56:42,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-26 11:56:42,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:42,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-26 11:56:42,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,423 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 169 flow. Second operand 4 states and 115 transitions. [2023-11-26 11:56:42,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 295 flow [2023-11-26 11:56:42,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:42,428 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 170 flow [2023-11-26 11:56:42,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-11-26 11:56:42,429 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-11-26 11:56:42,429 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 170 flow [2023-11-26 11:56:42,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:42,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:56:42,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:42,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash -55517014, now seen corresponding path program 1 times [2023-11-26 11:56:42,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:42,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693403233] [2023-11-26 11:56:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:42,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:42,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693403233] [2023-11-26 11:56:42,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693403233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552898899] [2023-11-26 11:56:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:42,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:42,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:42,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:42,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:56:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:42,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:56:42,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:42,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:42,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552898899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:42,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:56:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-26 11:56:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955082234] [2023-11-26 11:56:42,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:42,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:42,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:56:42,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:42,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:42,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:42,913 INFO L124 PetriNetUnfolderBase]: 219/455 cut-off events. [2023-11-26 11:56:42,913 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-26 11:56:42,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 455 events. 219/455 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2310 event pairs, 153 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 908. Up to 316 conditions per place. [2023-11-26 11:56:42,919 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 51 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-26 11:56:42,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 312 flow [2023-11-26 11:56:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2023-11-26 11:56:42,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-26 11:56:42,921 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 108 transitions. [2023-11-26 11:56:42,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 108 transitions. [2023-11-26 11:56:42,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:42,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 108 transitions. [2023-11-26 11:56:42,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2023-11-26 11:56:42,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,923 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 170 flow. Second operand 4 states and 108 transitions. [2023-11-26 11:56:42,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 312 flow [2023-11-26 11:56:42,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:42,928 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 170 flow [2023-11-26 11:56:42,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-26 11:56:42,929 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-11-26 11:56:42,929 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 170 flow [2023-11-26 11:56:42,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:42,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:42,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:42,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:43,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:43,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:43,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1721026934, now seen corresponding path program 1 times [2023-11-26 11:56:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:43,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954532313] [2023-11-26 11:56:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:43,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:43,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954532313] [2023-11-26 11:56:43,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954532313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:43,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:43,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:43,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297219299] [2023-11-26 11:56:43,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:43,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:43,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:43,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:56:43,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:43,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:43,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:43,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:43,560 INFO L124 PetriNetUnfolderBase]: 431/852 cut-off events. [2023-11-26 11:56:43,560 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-11-26 11:56:43,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 852 events. 431/852 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4370 event pairs, 131 based on Foata normal form. 48/725 useless extension candidates. Maximal degree in co-relation 1725. Up to 393 conditions per place. [2023-11-26 11:56:43,568 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 77 selfloop transitions, 6 changer transitions 6/100 dead transitions. [2023-11-26 11:56:43,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 100 transitions, 456 flow [2023-11-26 11:56:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:56:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:56:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2023-11-26 11:56:43,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-26 11:56:43,570 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 160 transitions. [2023-11-26 11:56:43,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 160 transitions. [2023-11-26 11:56:43,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:43,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 160 transitions. [2023-11-26 11:56:43,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,573 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,573 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 170 flow. Second operand 5 states and 160 transitions. [2023-11-26 11:56:43,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 100 transitions, 456 flow [2023-11-26 11:56:43,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:56:43,578 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 209 flow [2023-11-26 11:56:43,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-11-26 11:56:43,579 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-11-26 11:56:43,579 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 209 flow [2023-11-26 11:56:43,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:43,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:43,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:56:43,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:43,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash -899292797, now seen corresponding path program 1 times [2023-11-26 11:56:43,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:43,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028003560] [2023-11-26 11:56:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:43,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:43,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028003560] [2023-11-26 11:56:43,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028003560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:43,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:43,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:56:43,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016662235] [2023-11-26 11:56:43,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:43,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:43,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:43,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-26 11:56:43,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:43,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-26 11:56:43,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:43,817 INFO L124 PetriNetUnfolderBase]: 322/703 cut-off events. [2023-11-26 11:56:43,818 INFO L125 PetriNetUnfolderBase]: For 372/395 co-relation queries the response was YES. [2023-11-26 11:56:43,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 703 events. 322/703 cut-off events. For 372/395 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3691 event pairs, 236 based on Foata normal form. 23/657 useless extension candidates. Maximal degree in co-relation 1515. Up to 557 conditions per place. [2023-11-26 11:56:43,825 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 39 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-26 11:56:43,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 285 flow [2023-11-26 11:56:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-26 11:56:43,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-26 11:56:43,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-26 11:56:43,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-26 11:56:43,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:43,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-26 11:56:43,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,830 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 209 flow. Second operand 3 states and 81 transitions. [2023-11-26 11:56:43,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 285 flow [2023-11-26 11:56:43,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:43,834 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 204 flow [2023-11-26 11:56:43,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-11-26 11:56:43,835 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-26 11:56:43,835 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 204 flow [2023-11-26 11:56:43,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:43,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:43,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:43,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:56:43,837 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:43,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:43,837 INFO L85 PathProgramCache]: Analyzing trace with hash -899292796, now seen corresponding path program 1 times [2023-11-26 11:56:43,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:43,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638740485] [2023-11-26 11:56:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:43,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638740485] [2023-11-26 11:56:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638740485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133262497] [2023-11-26 11:56:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:44,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:44,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:56:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:44,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:56:44,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:44,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133262497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:44,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:56:44,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-26 11:56:44,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494398101] [2023-11-26 11:56:44,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:44,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:56:44,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:56:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:56:44,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-26 11:56:44,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2023-11-26 11:56:44,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:44,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-26 11:56:44,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:44,441 INFO L124 PetriNetUnfolderBase]: 260/559 cut-off events. [2023-11-26 11:56:44,442 INFO L125 PetriNetUnfolderBase]: For 280/303 co-relation queries the response was YES. [2023-11-26 11:56:44,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 559 events. 260/559 cut-off events. For 280/303 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2800 event pairs, 101 based on Foata normal form. 67/560 useless extension candidates. Maximal degree in co-relation 1250. Up to 282 conditions per place. [2023-11-26 11:56:44,447 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 31 selfloop transitions, 6 changer transitions 8/59 dead transitions. [2023-11-26 11:56:44,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 311 flow [2023-11-26 11:56:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:56:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:56:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2023-11-26 11:56:44,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-26 11:56:44,449 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2023-11-26 11:56:44,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2023-11-26 11:56:44,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:44,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2023-11-26 11:56:44,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:44,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:44,452 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:44,452 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 204 flow. Second operand 4 states and 104 transitions. [2023-11-26 11:56:44,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 311 flow [2023-11-26 11:56:44,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:44,456 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 192 flow [2023-11-26 11:56:44,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-26 11:56:44,458 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-26 11:56:44,458 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 192 flow [2023-11-26 11:56:44,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2023-11-26 11:56:44,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:44,459 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-26 11:56:44,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:44,666 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:44,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash 716362228, now seen corresponding path program 2 times [2023-11-26 11:56:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:44,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696845558] [2023-11-26 11:56:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:44,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:44,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696845558] [2023-11-26 11:56:44,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696845558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:44,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561518802] [2023-11-26 11:56:44,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:56:44,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:44,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:44,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:56:45,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:56:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:45,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:56:45,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:45,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:56:45,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-26 11:56:45,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561518802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:45,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:45,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-26 11:56:45,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872549945] [2023-11-26 11:56:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:45,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:56:45,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:56:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:56:45,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:45,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 192 flow. Second operand has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:45,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:45,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:45,499 INFO L124 PetriNetUnfolderBase]: 112/290 cut-off events. [2023-11-26 11:56:45,500 INFO L125 PetriNetUnfolderBase]: For 335/354 co-relation queries the response was YES. [2023-11-26 11:56:45,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 290 events. 112/290 cut-off events. For 335/354 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1180 event pairs, 71 based on Foata normal form. 21/276 useless extension candidates. Maximal degree in co-relation 686. Up to 185 conditions per place. [2023-11-26 11:56:45,503 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 18 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-11-26 11:56:45,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 49 transitions, 270 flow [2023-11-26 11:56:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:56:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-26 11:56:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 260 transitions. [2023-11-26 11:56:45,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2023-11-26 11:56:45,507 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 260 transitions. [2023-11-26 11:56:45,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 260 transitions. [2023-11-26 11:56:45,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:45,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 260 transitions. [2023-11-26 11:56:45,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,512 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,512 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 192 flow. Second operand 14 states and 260 transitions. [2023-11-26 11:56:45,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 49 transitions, 270 flow [2023-11-26 11:56:45,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 49 transitions, 244 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-26 11:56:45,515 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 208 flow [2023-11-26 11:56:45,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=208, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-11-26 11:56:45,517 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-26 11:56:45,517 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 208 flow [2023-11-26 11:56:45,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:45,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:45,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:56:45,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:56:45,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:45,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1387793782, now seen corresponding path program 1 times [2023-11-26 11:56:45,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:45,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210483694] [2023-11-26 11:56:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:45,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:56:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210483694] [2023-11-26 11:56:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210483694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:45,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:56:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:56:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79301974] [2023-11-26 11:56:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:56:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:56:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:56:45,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-26 11:56:45,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:45,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-26 11:56:45,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:45,930 INFO L124 PetriNetUnfolderBase]: 145/325 cut-off events. [2023-11-26 11:56:45,930 INFO L125 PetriNetUnfolderBase]: For 185/204 co-relation queries the response was YES. [2023-11-26 11:56:45,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 325 events. 145/325 cut-off events. For 185/204 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1329 event pairs, 86 based on Foata normal form. 17/304 useless extension candidates. Maximal degree in co-relation 745. Up to 221 conditions per place. [2023-11-26 11:56:45,934 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 43 selfloop transitions, 2 changer transitions 2/58 dead transitions. [2023-11-26 11:56:45,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 324 flow [2023-11-26 11:56:45,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:56:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:56:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-26 11:56:45,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2023-11-26 11:56:45,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-26 11:56:45,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-26 11:56:45,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:45,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-26 11:56:45,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,939 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 208 flow. Second operand 3 states and 82 transitions. [2023-11-26 11:56:45,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 324 flow [2023-11-26 11:56:45,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 256 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-26 11:56:45,943 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 148 flow [2023-11-26 11:56:45,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-11-26 11:56:45,945 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2023-11-26 11:56:45,945 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 148 flow [2023-11-26 11:56:45,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:45,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:45,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:45,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:56:45,946 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:45,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash 309306599, now seen corresponding path program 1 times [2023-11-26 11:56:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:45,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035921433] [2023-11-26 11:56:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:45,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:46,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035921433] [2023-11-26 11:56:46,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035921433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941037042] [2023-11-26 11:56:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:46,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:46,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:46,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:56:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:46,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:56:46,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:47,096 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 23 treesize of output 1 [2023-11-26 11:56:47,849 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 17 treesize of output 9 [2023-11-26 11:56:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:47,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:48,405 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 21 treesize of output 19 [2023-11-26 11:56:48,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 22 [2023-11-26 11:56:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:48,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941037042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:48,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:48,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2023-11-26 11:56:48,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449793681] [2023-11-26 11:56:48,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:48,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:56:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:56:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-26 11:56:48,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-26 11:56:48,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 148 flow. Second operand has 22 states, 22 states have (on average 15.045454545454545) internal successors, (331), 22 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:48,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:48,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-26 11:56:48,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:50,457 INFO L124 PetriNetUnfolderBase]: 534/1067 cut-off events. [2023-11-26 11:56:50,457 INFO L125 PetriNetUnfolderBase]: For 463/510 co-relation queries the response was YES. [2023-11-26 11:56:50,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1067 events. 534/1067 cut-off events. For 463/510 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5628 event pairs, 78 based on Foata normal form. 47/967 useless extension candidates. Maximal degree in co-relation 2421. Up to 223 conditions per place. [2023-11-26 11:56:50,469 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 87 selfloop transitions, 31 changer transitions 4/133 dead transitions. [2023-11-26 11:56:50,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 133 transitions, 646 flow [2023-11-26 11:56:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:56:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-26 11:56:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 324 transitions. [2023-11-26 11:56:50,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2023-11-26 11:56:50,472 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 324 transitions. [2023-11-26 11:56:50,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 324 transitions. [2023-11-26 11:56:50,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:50,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 324 transitions. [2023-11-26 11:56:50,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:50,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:50,479 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:50,479 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 148 flow. Second operand 16 states and 324 transitions. [2023-11-26 11:56:50,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 133 transitions, 646 flow [2023-11-26 11:56:50,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 133 transitions, 642 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:56:50,484 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 338 flow [2023-11-26 11:56:50,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=338, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-26 11:56:50,488 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2023-11-26 11:56:50,488 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 338 flow [2023-11-26 11:56:50,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.045454545454545) internal successors, (331), 22 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:50,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:50,489 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] [2023-11-26 11:56:50,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:50,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:56:50,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:50,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash 998570479, now seen corresponding path program 1 times [2023-11-26 11:56:50,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:50,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746522915] [2023-11-26 11:56:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:50,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:51,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:51,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746522915] [2023-11-26 11:56:51,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746522915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:51,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359768172] [2023-11-26 11:56:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:51,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:51,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:51,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:51,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:56:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:51,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:56:51,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:51,594 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 23 treesize of output 1 [2023-11-26 11:56:52,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:56:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:52,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:52,760 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 20 treesize of output 18 [2023-11-26 11:56:52,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 20 [2023-11-26 11:56:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359768172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:52,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:52,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2023-11-26 11:56:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707368957] [2023-11-26 11:56:52,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:52,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:56:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:56:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:56:53,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2023-11-26 11:56:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 338 flow. Second operand has 23 states, 23 states have (on average 15.956521739130435) internal successors, (367), 23 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:53,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:53,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2023-11-26 11:56:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:56,184 INFO L124 PetriNetUnfolderBase]: 400/901 cut-off events. [2023-11-26 11:56:56,184 INFO L125 PetriNetUnfolderBase]: For 1726/1793 co-relation queries the response was YES. [2023-11-26 11:56:56,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 901 events. 400/901 cut-off events. For 1726/1793 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4958 event pairs, 28 based on Foata normal form. 101/956 useless extension candidates. Maximal degree in co-relation 2697. Up to 209 conditions per place. [2023-11-26 11:56:56,196 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 103 selfloop transitions, 42 changer transitions 4/162 dead transitions. [2023-11-26 11:56:56,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 162 transitions, 1050 flow [2023-11-26 11:56:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 11:56:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 11:56:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 449 transitions. [2023-11-26 11:56:56,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251893939393939 [2023-11-26 11:56:56,200 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 449 transitions. [2023-11-26 11:56:56,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 449 transitions. [2023-11-26 11:56:56,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:56,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 449 transitions. [2023-11-26 11:56:56,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 20.40909090909091) internal successors, (449), 22 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:56,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:56,206 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:56,206 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 338 flow. Second operand 22 states and 449 transitions. [2023-11-26 11:56:56,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 162 transitions, 1050 flow [2023-11-26 11:56:56,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 162 transitions, 1012 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-26 11:56:56,216 INFO L231 Difference]: Finished difference. Result has 96 places, 79 transitions, 537 flow [2023-11-26 11:56:56,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=537, PETRI_PLACES=96, PETRI_TRANSITIONS=79} [2023-11-26 11:56:56,218 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-11-26 11:56:56,218 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 79 transitions, 537 flow [2023-11-26 11:56:56,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 15.956521739130435) internal successors, (367), 23 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:56,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:56,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:56,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:56:56,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:56:56,427 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:56,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1472521581, now seen corresponding path program 2 times [2023-11-26 11:56:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:56,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148843329] [2023-11-26 11:56:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:57,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:57,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148843329] [2023-11-26 11:56:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148843329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:57,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578121672] [2023-11-26 11:56:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:56:57,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:57,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:57,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:56:57,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:56:57,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:56:57,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:56:57,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:56:57,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:56:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578121672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:56:57,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:56:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 14 [2023-11-26 11:56:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972544015] [2023-11-26 11:56:57,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:56:57,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:56:57,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:56:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:56:57,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-26 11:56:57,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 79 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:57,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:57,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-26 11:56:57,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:58,265 INFO L124 PetriNetUnfolderBase]: 448/1059 cut-off events. [2023-11-26 11:56:58,266 INFO L125 PetriNetUnfolderBase]: For 3324/3367 co-relation queries the response was YES. [2023-11-26 11:56:58,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1059 events. 448/1059 cut-off events. For 3324/3367 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6283 event pairs, 27 based on Foata normal form. 39/1048 useless extension candidates. Maximal degree in co-relation 3575. Up to 276 conditions per place. [2023-11-26 11:56:58,283 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 84 selfloop transitions, 16 changer transitions 2/116 dead transitions. [2023-11-26 11:56:58,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 116 transitions, 922 flow [2023-11-26 11:56:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:56:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:56:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2023-11-26 11:56:58,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-26 11:56:58,286 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 180 transitions. [2023-11-26 11:56:58,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 180 transitions. [2023-11-26 11:56:58,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:58,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 180 transitions. [2023-11-26 11:56:58,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:58,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:58,289 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:58,290 INFO L175 Difference]: Start difference. First operand has 96 places, 79 transitions, 537 flow. Second operand 7 states and 180 transitions. [2023-11-26 11:56:58,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 116 transitions, 922 flow [2023-11-26 11:56:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 116 transitions, 825 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-11-26 11:56:58,307 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 517 flow [2023-11-26 11:56:58,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2023-11-26 11:56:58,308 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-11-26 11:56:58,308 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 517 flow [2023-11-26 11:56:58,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:58,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:58,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:58,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:56:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:56:58,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:56:58,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:56:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -233000691, now seen corresponding path program 1 times [2023-11-26 11:56:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:56:58,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248323085] [2023-11-26 11:56:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:56:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:56:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248323085] [2023-11-26 11:56:58,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248323085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:56:58,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703006137] [2023-11-26 11:56:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:56:58,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:56:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:56:58,720 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:56:58,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:56:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:56:58,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:56:58,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:56:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:58,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:56:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:56:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703006137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:56:59,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:56:59,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-26 11:56:59,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791270172] [2023-11-26 11:56:59,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:56:59,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:56:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:56:59,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:56:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:56:59,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2023-11-26 11:56:59,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 517 flow. Second operand has 18 states, 18 states have (on average 15.833333333333334) internal successors, (285), 18 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) [2023-11-26 11:56:59,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:56:59,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2023-11-26 11:56:59,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:56:59,807 INFO L124 PetriNetUnfolderBase]: 412/1023 cut-off events. [2023-11-26 11:56:59,807 INFO L125 PetriNetUnfolderBase]: For 3600/3626 co-relation queries the response was YES. [2023-11-26 11:56:59,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3494 conditions, 1023 events. 412/1023 cut-off events. For 3600/3626 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5988 event pairs, 232 based on Foata normal form. 22/997 useless extension candidates. Maximal degree in co-relation 3464. Up to 470 conditions per place. [2023-11-26 11:56:59,821 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 30 selfloop transitions, 12 changer transitions 49/106 dead transitions. [2023-11-26 11:56:59,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 782 flow [2023-11-26 11:56:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:56:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:56:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2023-11-26 11:56:59,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-26 11:56:59,823 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 186 transitions. [2023-11-26 11:56:59,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 186 transitions. [2023-11-26 11:56:59,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:56:59,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 186 transitions. [2023-11-26 11:56:59,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:59,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:59,827 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:56:59,827 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 517 flow. Second operand 9 states and 186 transitions. [2023-11-26 11:56:59,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 782 flow [2023-11-26 11:56:59,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 762 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 11:56:59,843 INFO L231 Difference]: Finished difference. Result has 100 places, 57 transitions, 317 flow [2023-11-26 11:56:59,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=317, PETRI_PLACES=100, PETRI_TRANSITIONS=57} [2023-11-26 11:56:59,844 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2023-11-26 11:56:59,844 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 57 transitions, 317 flow [2023-11-26 11:56:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.833333333333334) internal successors, (285), 18 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) [2023-11-26 11:56:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:56:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:56:59,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 11:57:00,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 11:57:00,053 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:57:00,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1596471747, now seen corresponding path program 2 times [2023-11-26 11:57:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276119260] [2023-11-26 11:57:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:00,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:01,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:01,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276119260] [2023-11-26 11:57:01,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276119260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:01,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97236036] [2023-11-26 11:57:01,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:01,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:01,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:01,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:57:01,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 11:57:01,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:01,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:57:01,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:57:01,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97236036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:01,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:57:01,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 14 [2023-11-26 11:57:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772978472] [2023-11-26 11:57:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:57:01,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:01,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:57:01,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:57:01,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-26 11:57:01,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 57 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:01,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:01,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-26 11:57:01,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:01,889 INFO L124 PetriNetUnfolderBase]: 299/703 cut-off events. [2023-11-26 11:57:01,889 INFO L125 PetriNetUnfolderBase]: For 2438/2442 co-relation queries the response was YES. [2023-11-26 11:57:01,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 703 events. 299/703 cut-off events. For 2438/2442 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3596 event pairs, 42 based on Foata normal form. 20/689 useless extension candidates. Maximal degree in co-relation 2346. Up to 237 conditions per place. [2023-11-26 11:57:01,901 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 59 selfloop transitions, 7 changer transitions 2/82 dead transitions. [2023-11-26 11:57:01,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 570 flow [2023-11-26 11:57:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:57:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:57:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-26 11:57:01,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-11-26 11:57:01,903 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-26 11:57:01,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-26 11:57:01,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:01,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-26 11:57:01,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:01,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:01,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:01,906 INFO L175 Difference]: Start difference. First operand has 100 places, 57 transitions, 317 flow. Second operand 6 states and 153 transitions. [2023-11-26 11:57:01,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 570 flow [2023-11-26 11:57:01,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 502 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-11-26 11:57:01,915 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 300 flow [2023-11-26 11:57:01,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2023-11-26 11:57:01,916 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2023-11-26 11:57:01,916 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 300 flow [2023-11-26 11:57:01,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:01,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:01,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:01,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:02,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:57:02,123 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:57:02,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:02,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1736367458, now seen corresponding path program 2 times [2023-11-26 11:57:02,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:02,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444417728] [2023-11-26 11:57:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:57:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:02,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444417728] [2023-11-26 11:57:02,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444417728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:02,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198836592] [2023-11-26 11:57:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:57:02,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:02,323 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:02,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:57:02,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:57:02,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:57:02,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-26 11:57:02,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:02,617 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 15 treesize of output 1 [2023-11-26 11:57:03,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:03,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-11-26 11:57:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:03,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:57:04,122 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 58 treesize of output 52 [2023-11-26 11:57:04,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:57:04,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 99 [2023-11-26 11:57:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:04,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198836592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:57:04,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:57:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 28 [2023-11-26 11:57:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696610161] [2023-11-26 11:57:04,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:57:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 11:57:04,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 11:57:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:57:05,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2023-11-26 11:57:05,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 300 flow. Second operand has 29 states, 29 states have (on average 11.310344827586206) internal successors, (328), 29 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:05,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:05,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2023-11-26 11:57:05,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:12,448 INFO L124 PetriNetUnfolderBase]: 2452/4664 cut-off events. [2023-11-26 11:57:12,448 INFO L125 PetriNetUnfolderBase]: For 11327/11327 co-relation queries the response was YES. [2023-11-26 11:57:12,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14572 conditions, 4664 events. 2452/4664 cut-off events. For 11327/11327 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 29432 event pairs, 161 based on Foata normal form. 290/4713 useless extension candidates. Maximal degree in co-relation 14549. Up to 827 conditions per place. [2023-11-26 11:57:12,492 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 353 selfloop transitions, 194 changer transitions 141/696 dead transitions. [2023-11-26 11:57:12,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 696 transitions, 4571 flow [2023-11-26 11:57:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-26 11:57:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-11-26 11:57:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1556 transitions. [2023-11-26 11:57:12,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3376736111111111 [2023-11-26 11:57:12,500 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 1556 transitions. [2023-11-26 11:57:12,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 1556 transitions. [2023-11-26 11:57:12,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:12,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 1556 transitions. [2023-11-26 11:57:12,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 16.208333333333332) internal successors, (1556), 96 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:12,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 48.0) internal successors, (4656), 97 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:12,517 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 48.0) internal successors, (4656), 97 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:12,517 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 300 flow. Second operand 96 states and 1556 transitions. [2023-11-26 11:57:12,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 696 transitions, 4571 flow [2023-11-26 11:57:12,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 696 transitions, 4527 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:57:12,615 INFO L231 Difference]: Finished difference. Result has 205 places, 272 transitions, 2533 flow [2023-11-26 11:57:12,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=2533, PETRI_PLACES=205, PETRI_TRANSITIONS=272} [2023-11-26 11:57:12,616 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 159 predicate places. [2023-11-26 11:57:12,616 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 272 transitions, 2533 flow [2023-11-26 11:57:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.310344827586206) internal successors, (328), 29 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:12,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:12,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:12,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:57:12,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:57:12,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -443772075, now seen corresponding path program 1 times [2023-11-26 11:57:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:12,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780385359] [2023-11-26 11:57:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:57:12,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:12,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780385359] [2023-11-26 11:57:12,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780385359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:12,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:12,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:12,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102584677] [2023-11-26 11:57:12,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:12,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2023-11-26 11:57:12,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 272 transitions, 2533 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:12,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:57:12,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2023-11-26 11:57:12,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:57:14,189 INFO L124 PetriNetUnfolderBase]: 2232/4616 cut-off events. [2023-11-26 11:57:14,189 INFO L125 PetriNetUnfolderBase]: For 47281/47483 co-relation queries the response was YES. [2023-11-26 11:57:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21981 conditions, 4616 events. 2232/4616 cut-off events. For 47281/47483 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 32056 event pairs, 342 based on Foata normal form. 192/4580 useless extension candidates. Maximal degree in co-relation 21922. Up to 2024 conditions per place. [2023-11-26 11:57:14,284 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 297 selfloop transitions, 4 changer transitions 0/322 dead transitions. [2023-11-26 11:57:14,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 322 transitions, 3688 flow [2023-11-26 11:57:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:57:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-26 11:57:14,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2023-11-26 11:57:14,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-26 11:57:14,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-26 11:57:14,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:57:14,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-26 11:57:14,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,288 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,288 INFO L175 Difference]: Start difference. First operand has 205 places, 272 transitions, 2533 flow. Second operand 4 states and 95 transitions. [2023-11-26 11:57:14,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 322 transitions, 3688 flow [2023-11-26 11:57:14,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 322 transitions, 2823 flow, removed 387 selfloop flow, removed 17 redundant places. [2023-11-26 11:57:14,496 INFO L231 Difference]: Finished difference. Result has 171 places, 260 transitions, 1706 flow [2023-11-26 11:57:14,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1706, PETRI_PLACES=171, PETRI_TRANSITIONS=260} [2023-11-26 11:57:14,497 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2023-11-26 11:57:14,497 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 260 transitions, 1706 flow [2023-11-26 11:57:14,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:57:14,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:57:14,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:57:14,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-26 11:57:14,498 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 11:57:14,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 529209424, now seen corresponding path program 1 times [2023-11-26 11:57:14,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:14,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85114327] [2023-11-26 11:57:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:14,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85114327] [2023-11-26 11:57:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85114327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:57:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767448571] [2023-11-26 11:57:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:15,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:15,664 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:15,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a9a544-4872-4cba-8532-dc053135d191/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:57:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:15,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-26 11:57:15,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:15,879 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 23 treesize of output 1 [2023-11-26 11:57:15,999 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 36 treesize of output 16 [2023-11-26 11:57:21,448 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-26 11:57:21,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 21 [2023-11-26 11:57:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:57:21,515 INFO L327 TraceCheckSpWp]: Computing backward predicates...