./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 cf1a7837 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_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:17:04,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:17:05,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:17:05,048 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:17:05,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:17:05,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:17:05,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:17:05,094 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:17:05,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:17:05,102 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:17:05,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:17:05,104 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:17:05,104 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:17:05,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:17:05,108 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:17:05,109 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:17:05,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:17:05,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:17:05,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:17:05,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:17:05,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:17:05,114 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:17:05,115 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:17:05,115 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:17:05,116 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:17:05,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:17:05,119 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:17:05,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:17:05,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:17:05,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:17:05,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:05,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:17:05,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:17:05,124 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:17:05,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:17:05,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:17:05,131 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:17:05,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:17:05,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:17:05,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:17:05,132 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:17:05,132 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_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-12 02:17:05,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:05,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:05,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:05,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:05,510 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:05,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-12 02:17:08,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:09,047 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:09,048 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-12 02:17:09,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/data/cd03d1fc3/4c91330e8f734ce4a73ef76b7c037e9c/FLAG62db62f8d [2023-11-12 02:17:09,070 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/data/cd03d1fc3/4c91330e8f734ce4a73ef76b7c037e9c [2023-11-12 02:17:09,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:09,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:09,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:09,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:09,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:09,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4903eb50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09, skipping insertion in model container [2023-11-12 02:17:09,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,124 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:09,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:09,375 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:09,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:09,411 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:17:09,412 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:17:09,419 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:17:09,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09 WrapperNode [2023-11-12 02:17:09,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:09,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:09,421 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:17:09,421 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:17:09,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,439 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,473 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 169 [2023-11-12 02:17:09,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:17:09,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:17:09,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:17:09,475 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:17:09,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,511 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:17:09,525 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:17:09,525 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:17:09,525 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:17:09,526 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (1/1) ... [2023-11-12 02:17:09,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:09,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:17:09,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:17:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:17:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:17:09,641 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:17:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:17:09,642 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:17:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:17:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:17:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:17:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:17:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:17:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:17:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:17:09,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:17:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:17:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:17:09,649 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:17:09,808 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:17:09,810 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:17:10,195 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:17:10,312 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:17:10,312 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 02:17:10,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:10 BoogieIcfgContainer [2023-11-12 02:17:10,323 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:17:10,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:17:10,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:17:10,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:17:10,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:09" (1/3) ... [2023-11-12 02:17:10,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3522671e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:10, skipping insertion in model container [2023-11-12 02:17:10,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:09" (2/3) ... [2023-11-12 02:17:10,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3522671e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:17:10, skipping insertion in model container [2023-11-12 02:17:10,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:17:10" (3/3) ... [2023-11-12 02:17:10,332 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-12 02:17:10,339 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:17:10,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:17:10,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-12 02:17:10,348 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:17:10,431 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:17:10,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 163 transitions, 340 flow [2023-11-12 02:17:10,561 INFO L124 PetriNetUnfolderBase]: 11/161 cut-off events. [2023-11-12 02:17:10,561 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:17:10,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 11/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-12 02:17:10,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 163 transitions, 340 flow [2023-11-12 02:17:10,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 139 transitions, 287 flow [2023-11-12 02:17:10,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:17:10,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 139 transitions, 287 flow [2023-11-12 02:17:10,593 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 139 transitions, 287 flow [2023-11-12 02:17:10,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 139 transitions, 287 flow [2023-11-12 02:17:10,668 INFO L124 PetriNetUnfolderBase]: 10/139 cut-off events. [2023-11-12 02:17:10,668 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:17:10,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 10/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 183 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-12 02:17:10,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 2186 [2023-11-12 02:17:17,207 INFO L134 LiptonReduction]: Checked pairs total: 2431 [2023-11-12 02:17:17,207 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-11-12 02:17:17,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:17:17,241 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;@551ad281, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:17:17,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-12 02:17:17,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:17:17,244 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-12 02:17:17,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:17:17,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:17,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:17:17,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:17,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:17,251 INFO L85 PathProgramCache]: Analyzing trace with hash 22438, now seen corresponding path program 1 times [2023-11-12 02:17:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:17,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946928144] [2023-11-12 02:17:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:17,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946928144] [2023-11-12 02:17:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946928144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:17,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:17,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:17:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383453877] [2023-11-12 02:17:17,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:17,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:17,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 321 [2023-11-12 02:17:17,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:17,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:17,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 321 [2023-11-12 02:17:17,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:17,793 INFO L124 PetriNetUnfolderBase]: 132/231 cut-off events. [2023-11-12 02:17:17,793 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:17:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 231 events. 132/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 754 event pairs, 102 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 420. Up to 231 conditions per place. [2023-11-12 02:17:17,800 INFO L140 encePairwiseOnDemand]: 313/321 looper letters, 22 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-11-12 02:17:17,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 109 flow [2023-11-12 02:17:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-11-12 02:17:17,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45794392523364486 [2023-11-12 02:17:17,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-11-12 02:17:17,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-11-12 02:17:17,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:17,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-11-12 02:17:17,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:17,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:17,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:17,853 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 441 transitions. [2023-11-12 02:17:17,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 109 flow [2023-11-12 02:17:17,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:17:17,862 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 71 flow [2023-11-12 02:17:17,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-11-12 02:17:17,870 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-12 02:17:17,870 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 71 flow [2023-11-12 02:17:17,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:17,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:17,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:17:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:17:17,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:17,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 696821, now seen corresponding path program 1 times [2023-11-12 02:17:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:17,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450470374] [2023-11-12 02:17:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:17,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450470374] [2023-11-12 02:17:18,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450470374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116005344] [2023-11-12 02:17:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:18,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:18,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:18,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:17:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:18,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:17:18,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:18,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:18,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116005344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:18,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:18,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 02:17:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102441524] [2023-11-12 02:17:18,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:17:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:17:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:17:18,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 321 [2023-11-12 02:17:18,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:18,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 321 [2023-11-12 02:17:18,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:18,488 INFO L124 PetriNetUnfolderBase]: 138/240 cut-off events. [2023-11-12 02:17:18,489 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:17:18,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 240 events. 138/240 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 780 event pairs, 102 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 463. Up to 233 conditions per place. [2023-11-12 02:17:18,495 INFO L140 encePairwiseOnDemand]: 316/321 looper letters, 21 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2023-11-12 02:17:18,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 175 flow [2023-11-12 02:17:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:17:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:17:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 996 transitions. [2023-11-12 02:17:18,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432576769025367 [2023-11-12 02:17:18,510 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 996 transitions. [2023-11-12 02:17:18,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 996 transitions. [2023-11-12 02:17:18,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:18,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 996 transitions. [2023-11-12 02:17:18,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.28571428571428) internal successors, (996), 7 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,524 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,524 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 71 flow. Second operand 7 states and 996 transitions. [2023-11-12 02:17:18,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 175 flow [2023-11-12 02:17:18,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 170 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:18,526 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 150 flow [2023-11-12 02:17:18,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-11-12 02:17:18,528 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-12 02:17:18,528 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 150 flow [2023-11-12 02:17:18,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:18,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-12 02:17:18,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:18,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:18,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:18,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 21602406, now seen corresponding path program 1 times [2023-11-12 02:17:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:18,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247623656] [2023-11-12 02:17:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:18,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247623656] [2023-11-12 02:17:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247623656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:18,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:18,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:18,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368186065] [2023-11-12 02:17:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:18,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:17:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 321 [2023-11-12 02:17:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 321 [2023-11-12 02:17:18,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:18,953 INFO L124 PetriNetUnfolderBase]: 135/236 cut-off events. [2023-11-12 02:17:18,953 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:17:18,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 236 events. 135/236 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 772 event pairs, 102 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 489. Up to 230 conditions per place. [2023-11-12 02:17:18,957 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 24 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-11-12 02:17:18,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 183 flow [2023-11-12 02:17:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-11-12 02:17:18,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45067497403946 [2023-11-12 02:17:18,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-11-12 02:17:18,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-11-12 02:17:18,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:18,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-11-12 02:17:18,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,966 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 150 flow. Second operand 3 states and 434 transitions. [2023-11-12 02:17:18,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 183 flow [2023-11-12 02:17:18,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 162 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-12 02:17:18,971 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 114 flow [2023-11-12 02:17:18,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-12 02:17:18,972 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-11-12 02:17:18,972 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 114 flow [2023-11-12 02:17:18,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:18,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:18,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:17:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:17:18,974 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:18,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 669433888, now seen corresponding path program 1 times [2023-11-12 02:17:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296695552] [2023-11-12 02:17:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:19,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296695552] [2023-11-12 02:17:19,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296695552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:19,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:19,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:19,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696240093] [2023-11-12 02:17:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:19,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:19,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 321 [2023-11-12 02:17:19,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:19,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 321 [2023-11-12 02:17:19,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:19,358 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2023-11-12 02:17:19,359 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-12 02:17:19,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 290 events. 158/290 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1038 event pairs, 126 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 603. Up to 235 conditions per place. [2023-11-12 02:17:19,362 INFO L140 encePairwiseOnDemand]: 311/321 looper letters, 27 selfloop transitions, 2 changer transitions 11/40 dead transitions. [2023-11-12 02:17:19,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 218 flow [2023-11-12 02:17:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:17:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:17:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-11-12 02:17:19,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44937694704049846 [2023-11-12 02:17:19,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-11-12 02:17:19,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-11-12 02:17:19,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:19,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-11-12 02:17:19,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,374 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 114 flow. Second operand 4 states and 577 transitions. [2023-11-12 02:17:19,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 218 flow [2023-11-12 02:17:19,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:19,377 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 115 flow [2023-11-12 02:17:19,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-12 02:17:19,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-12 02:17:19,379 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 115 flow [2023-11-12 02:17:19,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:19,380 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:17:19,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:17:19,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:19,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash -714884817, now seen corresponding path program 2 times [2023-11-12 02:17:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:19,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125615598] [2023-11-12 02:17:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:19,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125615598] [2023-11-12 02:17:19,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125615598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:19,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054164126] [2023-11-12 02:17:19,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:19,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:19,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:19,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:17:19,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:17:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:19,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:17:19,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:17:19,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:19,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054164126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:19,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:19,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-12 02:17:19,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637962524] [2023-11-12 02:17:19,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:19,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:17:19,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 321 [2023-11-12 02:17:19,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:19,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 321 [2023-11-12 02:17:19,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:19,694 INFO L124 PetriNetUnfolderBase]: 134/234 cut-off events. [2023-11-12 02:17:19,694 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-12 02:17:19,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 234 events. 134/234 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 744 event pairs, 102 based on Foata normal form. 1/166 useless extension candidates. Maximal degree in co-relation 588. Up to 229 conditions per place. [2023-11-12 02:17:19,696 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 23 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-11-12 02:17:19,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 161 flow [2023-11-12 02:17:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-11-12 02:17:19,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45586708203530635 [2023-11-12 02:17:19,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-11-12 02:17:19,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-11-12 02:17:19,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:19,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-11-12 02:17:19,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,705 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 115 flow. Second operand 3 states and 439 transitions. [2023-11-12 02:17:19,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 161 flow [2023-11-12 02:17:19,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 142 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-12 02:17:19,707 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 96 flow [2023-11-12 02:17:19,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-11-12 02:17:19,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-11-12 02:17:19,708 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 96 flow [2023-11-12 02:17:19,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:19,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:19,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:17:19,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:19,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:19,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:19,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash -715126758, now seen corresponding path program 1 times [2023-11-12 02:17:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:19,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471798781] [2023-11-12 02:17:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:20,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471798781] [2023-11-12 02:17:20,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471798781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:20,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:17:20,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:17:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436642080] [2023-11-12 02:17:20,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:20,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:17:20,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:20,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:17:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:17:20,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 321 [2023-11-12 02:17:20,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:20,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 321 [2023-11-12 02:17:20,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:20,288 INFO L124 PetriNetUnfolderBase]: 158/282 cut-off events. [2023-11-12 02:17:20,288 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-12 02:17:20,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 282 events. 158/282 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1076 event pairs, 34 based on Foata normal form. 20/226 useless extension candidates. Maximal degree in co-relation 661. Up to 123 conditions per place. [2023-11-12 02:17:20,291 INFO L140 encePairwiseOnDemand]: 313/321 looper letters, 43 selfloop transitions, 5 changer transitions 3/51 dead transitions. [2023-11-12 02:17:20,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 265 flow [2023-11-12 02:17:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:17:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:17:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-11-12 02:17:20,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44672897196261685 [2023-11-12 02:17:20,296 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-11-12 02:17:20,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-11-12 02:17:20,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:20,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-11-12 02:17:20,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,303 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 96 flow. Second operand 5 states and 717 transitions. [2023-11-12 02:17:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 265 flow [2023-11-12 02:17:20,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 51 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:20,306 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 142 flow [2023-11-12 02:17:20,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-12 02:17:20,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-12 02:17:20,307 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 142 flow [2023-11-12 02:17:20,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:20,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:20,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:17:20,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:20,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash -38723113, now seen corresponding path program 1 times [2023-11-12 02:17:20,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:20,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081290566] [2023-11-12 02:17:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081290566] [2023-11-12 02:17:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081290566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467949848] [2023-11-12 02:17:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:20,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:20,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:17:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:20,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:17:20,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:17:20,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:20,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467949848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:20,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:20,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-12 02:17:20,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44127239] [2023-11-12 02:17:20,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:20,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:17:20,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:17:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:17:20,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 321 [2023-11-12 02:17:20,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:20,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 321 [2023-11-12 02:17:20,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:20,631 INFO L124 PetriNetUnfolderBase]: 82/150 cut-off events. [2023-11-12 02:17:20,631 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-12 02:17:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 150 events. 82/150 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 395 event pairs, 54 based on Foata normal form. 24/165 useless extension candidates. Maximal degree in co-relation 435. Up to 150 conditions per place. [2023-11-12 02:17:20,632 INFO L140 encePairwiseOnDemand]: 317/321 looper letters, 22 selfloop transitions, 1 changer transitions 6/29 dead transitions. [2023-11-12 02:17:20,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 184 flow [2023-11-12 02:17:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:17:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:17:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-11-12 02:17:20,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45794392523364486 [2023-11-12 02:17:20,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-11-12 02:17:20,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-11-12 02:17:20,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:20,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-11-12 02:17:20,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,640 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 142 flow. Second operand 3 states and 441 transitions. [2023-11-12 02:17:20,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 184 flow [2023-11-12 02:17:20,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 180 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-12 02:17:20,642 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 97 flow [2023-11-12 02:17:20,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-11-12 02:17:20,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-12 02:17:20,644 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 97 flow [2023-11-12 02:17:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:20,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:20,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:20,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:20,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:17:20,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:20,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1441811696, now seen corresponding path program 1 times [2023-11-12 02:17:20,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:20,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438918345] [2023-11-12 02:17:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:21,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:21,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438918345] [2023-11-12 02:17:21,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438918345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:21,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745269979] [2023-11-12 02:17:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:21,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:21,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:21,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:17:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:21,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:17:21,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:21,637 INFO L351 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 14 treesize of output 12 [2023-11-12 02:17:21,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-11-12 02:17:21,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:17:21,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:17:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:21,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:22,686 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:22,686 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-11-12 02:17:22,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:22,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 300 [2023-11-12 02:17:22,728 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:22,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 94 [2023-11-12 02:17:22,748 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:22,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 81 [2023-11-12 02:17:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:23,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745269979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:23,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:23,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2023-11-12 02:17:23,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316630813] [2023-11-12 02:17:23,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:23,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:17:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:17:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=323, Unknown=2, NotChecked=0, Total=420 [2023-11-12 02:17:23,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 321 [2023-11-12 02:17:23,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 97 flow. Second operand has 21 states, 21 states have (on average 86.42857142857143) internal successors, (1815), 21 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:23,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:23,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 321 [2023-11-12 02:17:23,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:24,835 INFO L124 PetriNetUnfolderBase]: 121/216 cut-off events. [2023-11-12 02:17:24,836 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-12 02:17:24,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 216 events. 121/216 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 578 event pairs, 20 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 691. Up to 99 conditions per place. [2023-11-12 02:17:24,838 INFO L140 encePairwiseOnDemand]: 311/321 looper letters, 42 selfloop transitions, 25 changer transitions 1/68 dead transitions. [2023-11-12 02:17:24,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 68 transitions, 422 flow [2023-11-12 02:17:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:17:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:17:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1348 transitions. [2023-11-12 02:17:24,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27995846313603323 [2023-11-12 02:17:24,846 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1348 transitions. [2023-11-12 02:17:24,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1348 transitions. [2023-11-12 02:17:24,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:24,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1348 transitions. [2023-11-12 02:17:24,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.86666666666666) internal successors, (1348), 15 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:24,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 321.0) internal successors, (5136), 16 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:24,863 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 321.0) internal successors, (5136), 16 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:24,864 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 97 flow. Second operand 15 states and 1348 transitions. [2023-11-12 02:17:24,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 68 transitions, 422 flow [2023-11-12 02:17:24,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 68 transitions, 353 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-12 02:17:24,869 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 263 flow [2023-11-12 02:17:24,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=263, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-12 02:17:24,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2023-11-12 02:17:24,872 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 263 flow [2023-11-12 02:17:24,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 86.42857142857143) internal successors, (1815), 21 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:24,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:24,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:24,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:25,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:25,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:25,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash -20516554, now seen corresponding path program 2 times [2023-11-12 02:17:25,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:25,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666213835] [2023-11-12 02:17:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:25,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:25,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:25,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666213835] [2023-11-12 02:17:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666213835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882805462] [2023-11-12 02:17:25,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:25,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:25,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:25,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:25,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:17:25,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:17:25,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:25,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:17:25,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:26,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:26,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882805462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:26,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:26,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-12 02:17:26,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230460659] [2023-11-12 02:17:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:26,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:17:26,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:17:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:17:26,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 321 [2023-11-12 02:17:26,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 126.66666666666667) internal successors, (760), 6 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:26,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:26,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 321 [2023-11-12 02:17:26,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:26,466 INFO L124 PetriNetUnfolderBase]: 161/280 cut-off events. [2023-11-12 02:17:26,466 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2023-11-12 02:17:26,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 280 events. 161/280 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 836 event pairs, 14 based on Foata normal form. 8/287 useless extension candidates. Maximal degree in co-relation 1000. Up to 179 conditions per place. [2023-11-12 02:17:26,470 INFO L140 encePairwiseOnDemand]: 314/321 looper letters, 48 selfloop transitions, 15 changer transitions 1/64 dead transitions. [2023-11-12 02:17:26,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 485 flow [2023-11-12 02:17:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:17:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:17:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 914 transitions. [2023-11-12 02:17:26,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40676457498887403 [2023-11-12 02:17:26,474 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 914 transitions. [2023-11-12 02:17:26,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 914 transitions. [2023-11-12 02:17:26,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:26,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 914 transitions. [2023-11-12 02:17:26,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.57142857142858) internal successors, (914), 7 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:26,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:26,487 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:26,487 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 263 flow. Second operand 7 states and 914 transitions. [2023-11-12 02:17:26,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 485 flow [2023-11-12 02:17:26,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 447 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-11-12 02:17:26,492 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 341 flow [2023-11-12 02:17:26,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-11-12 02:17:26,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-11-12 02:17:26,494 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 341 flow [2023-11-12 02:17:26,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.66666666666667) internal successors, (760), 6 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:26,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:26,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:26,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:26,703 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash -636013311, now seen corresponding path program 1 times [2023-11-12 02:17:26,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174304030] [2023-11-12 02:17:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:27,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174304030] [2023-11-12 02:17:27,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174304030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144330772] [2023-11-12 02:17:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:27,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:27,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:17:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:27,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 02:17:27,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:27,679 INFO L351 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 [2023-11-12 02:17:27,774 INFO L322 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-11-12 02:17:27,775 INFO L351 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 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-12 02:17:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:17:27,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-12 02:17:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:17:27,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-12 02:17:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:28,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:29,528 INFO L322 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-11-12 02:17:29,529 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 181 treesize of output 173 [2023-11-12 02:17:29,575 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:29,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 517 treesize of output 517 [2023-11-12 02:17:29,619 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:29,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 296 [2023-11-12 02:17:29,651 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:29,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 284 [2023-11-12 02:17:29,693 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:29,694 INFO L351 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 291 treesize of output 297 [2023-11-12 02:17:29,742 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:29,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 260 [2023-11-12 02:17:29,778 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:29,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 236 [2023-11-12 02:17:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:32,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144330772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:32,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:32,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-12 02:17:32,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240467180] [2023-11-12 02:17:32,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:32,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:17:32,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:17:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=407, Unknown=6, NotChecked=0, Total=506 [2023-11-12 02:17:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 321 [2023-11-12 02:17:33,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 341 flow. Second operand has 23 states, 23 states have (on average 88.56521739130434) internal successors, (2037), 23 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:33,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:33,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 321 [2023-11-12 02:17:33,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:36,059 INFO L124 PetriNetUnfolderBase]: 322/570 cut-off events. [2023-11-12 02:17:36,060 INFO L125 PetriNetUnfolderBase]: For 1433/1433 co-relation queries the response was YES. [2023-11-12 02:17:36,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 570 events. 322/570 cut-off events. For 1433/1433 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2298 event pairs, 60 based on Foata normal form. 32/599 useless extension candidates. Maximal degree in co-relation 2251. Up to 185 conditions per place. [2023-11-12 02:17:36,068 INFO L140 encePairwiseOnDemand]: 312/321 looper letters, 76 selfloop transitions, 50 changer transitions 3/129 dead transitions. [2023-11-12 02:17:36,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 129 transitions, 1072 flow [2023-11-12 02:17:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:17:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-12 02:17:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1834 transitions. [2023-11-12 02:17:36,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2856697819314642 [2023-11-12 02:17:36,078 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1834 transitions. [2023-11-12 02:17:36,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1834 transitions. [2023-11-12 02:17:36,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:36,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1834 transitions. [2023-11-12 02:17:36,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 91.7) internal successors, (1834), 20 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:36,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 321.0) internal successors, (6741), 21 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:36,102 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 321.0) internal successors, (6741), 21 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:36,102 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 341 flow. Second operand 20 states and 1834 transitions. [2023-11-12 02:17:36,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 129 transitions, 1072 flow [2023-11-12 02:17:36,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 129 transitions, 1002 flow, removed 31 selfloop flow, removed 2 redundant places. [2023-11-12 02:17:36,115 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 752 flow [2023-11-12 02:17:36,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=752, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2023-11-12 02:17:36,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-11-12 02:17:36,116 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 752 flow [2023-11-12 02:17:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.56521739130434) internal successors, (2037), 23 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:36,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:36,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:36,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:36,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:17:36,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:36,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1479038590, now seen corresponding path program 3 times [2023-11-12 02:17:36,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:36,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119229496] [2023-11-12 02:17:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:37,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119229496] [2023-11-12 02:17:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119229496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:37,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460796897] [2023-11-12 02:17:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:17:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:37,184 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:17:37,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:17:37,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:37,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:17:37,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:37,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:37,587 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:37,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 45 [2023-11-12 02:17:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:17:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460796897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:37,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:37,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2023-11-12 02:17:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498133664] [2023-11-12 02:17:37,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:17:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:17:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:17:39,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 321 [2023-11-12 02:17:39,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 752 flow. Second operand has 18 states, 18 states have (on average 114.94444444444444) internal successors, (2069), 18 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:39,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:39,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 321 [2023-11-12 02:17:39,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:39,757 INFO L124 PetriNetUnfolderBase]: 398/694 cut-off events. [2023-11-12 02:17:39,758 INFO L125 PetriNetUnfolderBase]: For 2543/2543 co-relation queries the response was YES. [2023-11-12 02:17:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3157 conditions, 694 events. 398/694 cut-off events. For 2543/2543 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2938 event pairs, 32 based on Foata normal form. 16/709 useless extension candidates. Maximal degree in co-relation 3124. Up to 329 conditions per place. [2023-11-12 02:17:39,767 INFO L140 encePairwiseOnDemand]: 312/321 looper letters, 74 selfloop transitions, 41 changer transitions 2/117 dead transitions. [2023-11-12 02:17:39,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 117 transitions, 1218 flow [2023-11-12 02:17:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:17:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:17:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1637 transitions. [2023-11-12 02:17:39,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3642634623943035 [2023-11-12 02:17:39,774 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1637 transitions. [2023-11-12 02:17:39,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1637 transitions. [2023-11-12 02:17:39,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:39,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1637 transitions. [2023-11-12 02:17:39,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.92857142857143) internal successors, (1637), 14 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:39,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 321.0) internal successors, (4815), 15 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:39,792 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 321.0) internal successors, (4815), 15 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:39,793 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 752 flow. Second operand 14 states and 1637 transitions. [2023-11-12 02:17:39,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 117 transitions, 1218 flow [2023-11-12 02:17:39,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1141 flow, removed 29 selfloop flow, removed 7 redundant places. [2023-11-12 02:17:39,812 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 870 flow [2023-11-12 02:17:39,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=870, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2023-11-12 02:17:39,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-11-12 02:17:39,814 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 870 flow [2023-11-12 02:17:39,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.94444444444444) internal successors, (2069), 18 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:39,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:39,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:39,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:40,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:17:40,021 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:40,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1693381389, now seen corresponding path program 1 times [2023-11-12 02:17:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665112070] [2023-11-12 02:17:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:40,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665112070] [2023-11-12 02:17:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665112070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:40,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529441752] [2023-11-12 02:17:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:40,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:40,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:17:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:40,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:17:40,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:40,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:40,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529441752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:40,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:40,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-12 02:17:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836537996] [2023-11-12 02:17:40,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:17:40,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:17:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:17:40,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 321 [2023-11-12 02:17:40,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 870 flow. Second operand has 15 states, 15 states have (on average 130.6) internal successors, (1959), 15 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:40,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:40,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 321 [2023-11-12 02:17:40,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:40,926 INFO L124 PetriNetUnfolderBase]: 340/608 cut-off events. [2023-11-12 02:17:40,926 INFO L125 PetriNetUnfolderBase]: For 2457/2457 co-relation queries the response was YES. [2023-11-12 02:17:40,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 608 events. 340/608 cut-off events. For 2457/2457 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2549 event pairs, 184 based on Foata normal form. 24/632 useless extension candidates. Maximal degree in co-relation 2893. Up to 546 conditions per place. [2023-11-12 02:17:40,934 INFO L140 encePairwiseOnDemand]: 315/321 looper letters, 67 selfloop transitions, 3 changer transitions 19/89 dead transitions. [2023-11-12 02:17:40,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 985 flow [2023-11-12 02:17:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:17:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:17:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 938 transitions. [2023-11-12 02:17:40,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174454828660436 [2023-11-12 02:17:40,939 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 938 transitions. [2023-11-12 02:17:40,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 938 transitions. [2023-11-12 02:17:40,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:40,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 938 transitions. [2023-11-12 02:17:40,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.0) internal successors, (938), 7 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:40,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:40,966 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:40,966 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 870 flow. Second operand 7 states and 938 transitions. [2023-11-12 02:17:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 985 flow [2023-11-12 02:17:40,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 932 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-12 02:17:40,984 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 652 flow [2023-11-12 02:17:40,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=652, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-11-12 02:17:40,985 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-11-12 02:17:40,985 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 652 flow [2023-11-12 02:17:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 130.6) internal successors, (1959), 15 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:40,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:40,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:40,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:41,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:17:41,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:41,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1758443449, now seen corresponding path program 2 times [2023-11-12 02:17:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:41,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497657932] [2023-11-12 02:17:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:41,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:41,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497657932] [2023-11-12 02:17:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497657932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844465909] [2023-11-12 02:17:41,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:41,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:41,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:41,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:41,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:17:41,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:17:41,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:41,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:17:41,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:41,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2023-11-12 02:17:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:41,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:41,663 INFO L351 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 82 treesize of output 66 [2023-11-12 02:17:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:17:41,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844465909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:41,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:41,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-12 02:17:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602503423] [2023-11-12 02:17:41,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:41,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:17:41,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:17:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:17:41,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 321 [2023-11-12 02:17:41,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 652 flow. Second operand has 9 states, 9 states have (on average 136.0) internal successors, (1224), 9 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:41,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:41,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 321 [2023-11-12 02:17:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:42,002 INFO L124 PetriNetUnfolderBase]: 332/595 cut-off events. [2023-11-12 02:17:42,003 INFO L125 PetriNetUnfolderBase]: For 3488/3488 co-relation queries the response was YES. [2023-11-12 02:17:42,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 595 events. 332/595 cut-off events. For 3488/3488 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2534 event pairs, 66 based on Foata normal form. 68/663 useless extension candidates. Maximal degree in co-relation 2925. Up to 375 conditions per place. [2023-11-12 02:17:42,010 INFO L140 encePairwiseOnDemand]: 315/321 looper letters, 57 selfloop transitions, 15 changer transitions 15/87 dead transitions. [2023-11-12 02:17:42,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 87 transitions, 944 flow [2023-11-12 02:17:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:17:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:17:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 974 transitions. [2023-11-12 02:17:42,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43346684468179797 [2023-11-12 02:17:42,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 974 transitions. [2023-11-12 02:17:42,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 974 transitions. [2023-11-12 02:17:42,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:42,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 974 transitions. [2023-11-12 02:17:42,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:42,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:42,024 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:42,024 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 652 flow. Second operand 7 states and 974 transitions. [2023-11-12 02:17:42,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 87 transitions, 944 flow [2023-11-12 02:17:42,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 87 transitions, 868 flow, removed 35 selfloop flow, removed 11 redundant places. [2023-11-12 02:17:42,039 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 639 flow [2023-11-12 02:17:42,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2023-11-12 02:17:42,040 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-11-12 02:17:42,040 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 639 flow [2023-11-12 02:17:42,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 136.0) internal successors, (1224), 9 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:42,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:42,041 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:42,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:42,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:42,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:42,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1048805495, now seen corresponding path program 2 times [2023-11-12 02:17:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756842310] [2023-11-12 02:17:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:43,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756842310] [2023-11-12 02:17:43,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756842310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23895578] [2023-11-12 02:17:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:17:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:43,758 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:43,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:17:43,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:17:43,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:43,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:17:43,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:17:44,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:17:44,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23895578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:17:44,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:17:44,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2023-11-12 02:17:44,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418873188] [2023-11-12 02:17:44,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:17:44,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:17:44,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:44,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:17:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:17:44,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 321 [2023-11-12 02:17:44,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 639 flow. Second operand has 6 states, 6 states have (on average 126.66666666666667) internal successors, (760), 6 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:44,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:44,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 321 [2023-11-12 02:17:44,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:44,401 INFO L124 PetriNetUnfolderBase]: 284/507 cut-off events. [2023-11-12 02:17:44,401 INFO L125 PetriNetUnfolderBase]: For 2875/2875 co-relation queries the response was YES. [2023-11-12 02:17:44,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2567 conditions, 507 events. 284/507 cut-off events. For 2875/2875 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2009 event pairs, 36 based on Foata normal form. 12/519 useless extension candidates. Maximal degree in co-relation 2535. Up to 287 conditions per place. [2023-11-12 02:17:44,407 INFO L140 encePairwiseOnDemand]: 315/321 looper letters, 50 selfloop transitions, 20 changer transitions 3/73 dead transitions. [2023-11-12 02:17:44,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 753 flow [2023-11-12 02:17:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:17:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:17:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 909 transitions. [2023-11-12 02:17:44,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045393858477971 [2023-11-12 02:17:44,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 909 transitions. [2023-11-12 02:17:44,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 909 transitions. [2023-11-12 02:17:44,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:44,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 909 transitions. [2023-11-12 02:17:44,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.85714285714286) internal successors, (909), 7 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:44,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:44,424 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:44,425 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 639 flow. Second operand 7 states and 909 transitions. [2023-11-12 02:17:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 753 flow [2023-11-12 02:17:44,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 644 flow, removed 35 selfloop flow, removed 9 redundant places. [2023-11-12 02:17:44,437 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 512 flow [2023-11-12 02:17:44,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-12 02:17:44,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-11-12 02:17:44,438 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 512 flow [2023-11-12 02:17:44,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.66666666666667) internal successors, (760), 6 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:44,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:44,439 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:44,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:44,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:17:44,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:44,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:44,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1941482844, now seen corresponding path program 1 times [2023-11-12 02:17:44,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:44,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775189051] [2023-11-12 02:17:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:44,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775189051] [2023-11-12 02:17:44,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775189051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916460392] [2023-11-12 02:17:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:44,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:44,955 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:44,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:17:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:45,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:17:45,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:45,355 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:45,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 86 [2023-11-12 02:17:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:45,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:45,728 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:17:45,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 117 [2023-11-12 02:17:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916460392] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:45,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-12 02:17:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963575203] [2023-11-12 02:17:45,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:45,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:17:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:17:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:17:46,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 321 [2023-11-12 02:17:46,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 512 flow. Second operand has 19 states, 19 states have (on average 122.05263157894737) internal successors, (2319), 19 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:17:46,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 321 [2023-11-12 02:17:46,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:17:46,777 INFO L124 PetriNetUnfolderBase]: 244/459 cut-off events. [2023-11-12 02:17:46,777 INFO L125 PetriNetUnfolderBase]: For 1247/1247 co-relation queries the response was YES. [2023-11-12 02:17:46,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 459 events. 244/459 cut-off events. For 1247/1247 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1865 event pairs, 120 based on Foata normal form. 24/483 useless extension candidates. Maximal degree in co-relation 1837. Up to 318 conditions per place. [2023-11-12 02:17:46,782 INFO L140 encePairwiseOnDemand]: 315/321 looper letters, 59 selfloop transitions, 13 changer transitions 2/74 dead transitions. [2023-11-12 02:17:46,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 686 flow [2023-11-12 02:17:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:17:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:17:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1123 transitions. [2023-11-12 02:17:46,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38871581862236065 [2023-11-12 02:17:46,786 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1123 transitions. [2023-11-12 02:17:46,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1123 transitions. [2023-11-12 02:17:46,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:17:46,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1123 transitions. [2023-11-12 02:17:46,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 124.77777777777777) internal successors, (1123), 9 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,795 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,795 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 512 flow. Second operand 9 states and 1123 transitions. [2023-11-12 02:17:46,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 686 flow [2023-11-12 02:17:46,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 620 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-12 02:17:46,802 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 444 flow [2023-11-12 02:17:46,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=444, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-12 02:17:46,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2023-11-12 02:17:46,803 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 444 flow [2023-11-12 02:17:46,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 122.05263157894737) internal successors, (2319), 19 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:17:46,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:17:46,805 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:17:46,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:17:47,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:17:47,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-12 02:17:47,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:17:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1322844837, now seen corresponding path program 3 times [2023-11-12 02:17:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:17:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641069973] [2023-11-12 02:17:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:17:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:17:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:17:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:47,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:17:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641069973] [2023-11-12 02:17:47,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641069973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:17:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888525720] [2023-11-12 02:17:47,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:17:47,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:17:47,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:17:47,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:17:47,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb238771-ee1a-447d-9dfb-31aff35ce571/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:17:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:17:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:17:47,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-12 02:17:47,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:17:47,931 INFO L351 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 [2023-11-12 02:17:47,976 INFO L351 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 8 treesize of output 1 [2023-11-12 02:17:48,027 INFO L351 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 8 treesize of output 1 [2023-11-12 02:17:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:48,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:17:50,405 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:17:50,405 INFO L351 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 103 [2023-11-12 02:17:50,439 INFO L322 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2023-11-12 02:17:50,440 INFO L351 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 329 treesize of output 301 [2023-11-12 02:17:50,479 INFO L322 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-11-12 02:17:50,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 288 treesize of output 234 [2023-11-12 02:17:50,518 INFO L322 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2023-11-12 02:17:50,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 178 treesize of output 155 [2023-11-12 02:17:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:17:51,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888525720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:17:51,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:17:51,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-11-12 02:17:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802912425] [2023-11-12 02:17:51,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:17:51,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-12 02:17:51,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:17:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-12 02:17:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=666, Unknown=3, NotChecked=0, Total=870