./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu --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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:20,856 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:20,952 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:47:20,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:20,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:20,982 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:20,983 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:20,984 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:20,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:20,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:20,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:20,986 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:20,987 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:20,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:20,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:47:20,989 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:20,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:20,990 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:20,991 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:20,991 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:47:20,992 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:20,993 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:47:20,993 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:47:20,994 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:47:20,994 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:20,995 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:47:20,995 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:20,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:20,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:20,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:20,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:20,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:20,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:20,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:47:21,000 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:21,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:21,001 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:21,002 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:47:21,002 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:21,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:21,003 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:21,004 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_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-19 07:47:21,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:21,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:21,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:21,355 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:21,356 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:21,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-19 07:47:24,521 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:47:24,745 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:47:24,745 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-19 07:47:24,754 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/data/6e27af725/2ec0300481264f8b8e7f96f53e0b09c1/FLAG708a92f36 [2023-11-19 07:47:24,767 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/data/6e27af725/2ec0300481264f8b8e7f96f53e0b09c1 [2023-11-19 07:47:24,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:47:24,771 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:47:24,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:24,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:47:24,778 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:47:24,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:24" (1/1) ... [2023-11-19 07:47:24,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c813b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:24, skipping insertion in model container [2023-11-19 07:47:24,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:24" (1/1) ... [2023-11-19 07:47:24,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:47:24,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:24,985 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:47:25,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:47:25,017 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:47:25,017 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:47:25,023 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:47:25,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25 WrapperNode [2023-11-19 07:47:25,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:47:25,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:25,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:47:25,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:47:25,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,058 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-19 07:47:25,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:47:25,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:47:25,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:47:25,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:47:25,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,074 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,083 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:47:25,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:47:25,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:47:25,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:47:25,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (1/1) ... [2023-11-19 07:47:25,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:25,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:25,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:47:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:47:25,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:47:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:47:25,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:47:25,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:47:25,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:47:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:47:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:47:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:47:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:47:25,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:47:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:47:25,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:47:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:47:25,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:47:25,167 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:47:25,261 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:47:25,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:47:25,495 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:47:25,705 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:47:25,705 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:47:25,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:25 BoogieIcfgContainer [2023-11-19 07:47:25,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:47:25,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:47:25,712 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:47:25,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:47:25,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:24" (1/3) ... [2023-11-19 07:47:25,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6d2f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:25, skipping insertion in model container [2023-11-19 07:47:25,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:25" (2/3) ... [2023-11-19 07:47:25,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6d2f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:25, skipping insertion in model container [2023-11-19 07:47:25,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:25" (3/3) ... [2023-11-19 07:47:25,718 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-19 07:47:25,727 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:47:25,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:47:25,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-19 07:47:25,755 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:47:25,833 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:47:25,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 202 flow [2023-11-19 07:47:25,959 INFO L124 PetriNetUnfolderBase]: 6/92 cut-off events. [2023-11-19 07:47:25,959 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:47:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 102 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-19 07:47:25,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 202 flow [2023-11-19 07:47:25,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 70 transitions, 149 flow [2023-11-19 07:47:25,983 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:47:25,993 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 70 transitions, 149 flow [2023-11-19 07:47:25,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 70 transitions, 149 flow [2023-11-19 07:47:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 149 flow [2023-11-19 07:47:26,018 INFO L124 PetriNetUnfolderBase]: 5/70 cut-off events. [2023-11-19 07:47:26,019 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:47:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 5/70 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 98 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2023-11-19 07:47:26,022 INFO L119 LiptonReduction]: Number of co-enabled transitions 900 [2023-11-19 07:47:28,780 INFO L134 LiptonReduction]: Checked pairs total: 853 [2023-11-19 07:47:28,781 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-11-19 07:47:28,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:28,805 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;@1e656f01, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:28,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-19 07:47:28,809 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:47:28,809 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-19 07:47:28,809 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:47:28,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:28,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:47:28,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:28,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash 12062576, now seen corresponding path program 1 times [2023-11-19 07:47:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:28,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967012508] [2023-11-19 07:47:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:29,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:29,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967012508] [2023-11-19 07:47:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967012508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:47:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583206053] [2023-11-19 07:47:29,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:29,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:29,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:29,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:29,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:29,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:29,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:29,348 INFO L124 PetriNetUnfolderBase]: 188/315 cut-off events. [2023-11-19 07:47:29,349 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-19 07:47:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 315 events. 188/315 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1152 event pairs, 48 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 572. Up to 253 conditions per place. [2023-11-19 07:47:29,356 INFO L140 encePairwiseOnDemand]: 147/157 looper letters, 25 selfloop transitions, 4 changer transitions 3/32 dead transitions. [2023-11-19 07:47:29,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2023-11-19 07:47:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-11-19 07:47:29,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5668789808917197 [2023-11-19 07:47:29,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-11-19 07:47:29,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-11-19 07:47:29,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:29,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-11-19 07:47:29,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,411 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 267 transitions. [2023-11-19 07:47:29,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2023-11-19 07:47:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 135 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:47:29,418 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 78 flow [2023-11-19 07:47:29,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-19 07:47:29,426 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-19 07:47:29,426 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 78 flow [2023-11-19 07:47:29,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:29,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:47:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:47:29,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:29,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash 12062610, now seen corresponding path program 1 times [2023-11-19 07:47:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215102582] [2023-11-19 07:47:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:29,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215102582] [2023-11-19 07:47:29,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215102582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:29,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:29,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971167414] [2023-11-19 07:47:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:29,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:29,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:29,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-11-19 07:47:29,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:29,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-11-19 07:47:29,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:29,676 INFO L124 PetriNetUnfolderBase]: 172/299 cut-off events. [2023-11-19 07:47:29,676 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:47:29,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 299 events. 172/299 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1118 event pairs, 127 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 551. Up to 281 conditions per place. [2023-11-19 07:47:29,684 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 25 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-11-19 07:47:29,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 140 flow [2023-11-19 07:47:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-11-19 07:47:29,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535031847133758 [2023-11-19 07:47:29,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-11-19 07:47:29,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-11-19 07:47:29,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:29,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-11-19 07:47:29,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,699 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 78 flow. Second operand 3 states and 252 transitions. [2023-11-19 07:47:29,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 140 flow [2023-11-19 07:47:29,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:29,702 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 74 flow [2023-11-19 07:47:29,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-19 07:47:29,704 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-11-19 07:47:29,705 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 74 flow [2023-11-19 07:47:29,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:29,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:29,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:47:29,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:29,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash 373941451, now seen corresponding path program 1 times [2023-11-19 07:47:29,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:29,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786126532] [2023-11-19 07:47:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:29,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:29,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786126532] [2023-11-19 07:47:29,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786126532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:29,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723891471] [2023-11-19 07:47:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:29,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:29,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:29,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:47:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:29,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:29,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723891471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:30,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:30,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:47:30,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262234899] [2023-11-19 07:47:30,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:30,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:47:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:47:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:30,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-11-19 07:47:30,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:30,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-11-19 07:47:30,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:30,332 INFO L124 PetriNetUnfolderBase]: 419/658 cut-off events. [2023-11-19 07:47:30,333 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-19 07:47:30,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 658 events. 419/658 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2750 event pairs, 78 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 1194. Up to 343 conditions per place. [2023-11-19 07:47:30,342 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 66 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2023-11-19 07:47:30,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 78 transitions, 408 flow [2023-11-19 07:47:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:47:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:47:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 599 transitions. [2023-11-19 07:47:30,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5450409463148317 [2023-11-19 07:47:30,346 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 599 transitions. [2023-11-19 07:47:30,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 599 transitions. [2023-11-19 07:47:30,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:30,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 599 transitions. [2023-11-19 07:47:30,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.57142857142857) internal successors, (599), 7 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,354 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,354 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 74 flow. Second operand 7 states and 599 transitions. [2023-11-19 07:47:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 78 transitions, 408 flow [2023-11-19 07:47:30,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 78 transitions, 402 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:30,362 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 150 flow [2023-11-19 07:47:30,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-19 07:47:30,364 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-11-19 07:47:30,366 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 150 flow [2023-11-19 07:47:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.42857142857143) internal successors, (528), 7 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:30,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:30,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:30,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:30,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 373941450, now seen corresponding path program 1 times [2023-11-19 07:47:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:30,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015991181] [2023-11-19 07:47:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:30,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015991181] [2023-11-19 07:47:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015991181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216286863] [2023-11-19 07:47:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:30,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:30,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:30,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:30,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:30,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:30,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:30,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:30,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216286863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:30,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:30,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-19 07:47:30,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131993636] [2023-11-19 07:47:30,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:30,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:30,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 157 [2023-11-19 07:47:30,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:30,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 157 [2023-11-19 07:47:30,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:30,906 INFO L124 PetriNetUnfolderBase]: 357/582 cut-off events. [2023-11-19 07:47:30,906 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-19 07:47:30,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 582 events. 357/582 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2409 event pairs, 90 based on Foata normal form. 28/460 useless extension candidates. Maximal degree in co-relation 1464. Up to 450 conditions per place. [2023-11-19 07:47:30,915 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 35 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2023-11-19 07:47:30,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 245 flow [2023-11-19 07:47:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2023-11-19 07:47:30,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286624203821656 [2023-11-19 07:47:30,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 332 transitions. [2023-11-19 07:47:30,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 332 transitions. [2023-11-19 07:47:30,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:30,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 332 transitions. [2023-11-19 07:47:30,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.0) internal successors, (332), 4 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,927 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,927 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 150 flow. Second operand 4 states and 332 transitions. [2023-11-19 07:47:30,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 245 flow [2023-11-19 07:47:30,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 233 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:30,936 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 123 flow [2023-11-19 07:47:30,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-11-19 07:47:30,940 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-11-19 07:47:30,940 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 123 flow [2023-11-19 07:47:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:30,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:30,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:31,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:31,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:31,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash 373941417, now seen corresponding path program 1 times [2023-11-19 07:47:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:31,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428573982] [2023-11-19 07:47:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:31,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:31,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428573982] [2023-11-19 07:47:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428573982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006530529] [2023-11-19 07:47:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:31,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:31,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:31,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:31,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:31,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006530529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:31,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:31,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:47:31,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009314654] [2023-11-19 07:47:31,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:31,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:47:31,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:47:31,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:31,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:31,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:31,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:31,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:31,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:31,644 INFO L124 PetriNetUnfolderBase]: 588/945 cut-off events. [2023-11-19 07:47:31,644 INFO L125 PetriNetUnfolderBase]: For 675/675 co-relation queries the response was YES. [2023-11-19 07:47:31,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 945 events. 588/945 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4002 event pairs, 39 based on Foata normal form. 38/841 useless extension candidates. Maximal degree in co-relation 2752. Up to 407 conditions per place. [2023-11-19 07:47:31,655 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 69 selfloop transitions, 34 changer transitions 6/109 dead transitions. [2023-11-19 07:47:31,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 109 transitions, 717 flow [2023-11-19 07:47:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:47:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:47:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 628 transitions. [2023-11-19 07:47:31,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-19 07:47:31,659 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 628 transitions. [2023-11-19 07:47:31,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 628 transitions. [2023-11-19 07:47:31,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:31,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 628 transitions. [2023-11-19 07:47:31,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.71428571428571) internal successors, (628), 7 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:31,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:31,666 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:31,666 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 123 flow. Second operand 7 states and 628 transitions. [2023-11-19 07:47:31,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 109 transitions, 717 flow [2023-11-19 07:47:31,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 109 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:31,673 INFO L231 Difference]: Finished difference. Result has 42 places, 55 transitions, 471 flow [2023-11-19 07:47:31,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=471, PETRI_PLACES=42, PETRI_TRANSITIONS=55} [2023-11-19 07:47:31,676 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-11-19 07:47:31,676 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 55 transitions, 471 flow [2023-11-19 07:47:31,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.0) internal successors, (546), 7 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:31,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:31,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:31,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:31,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:31,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:31,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 373941416, now seen corresponding path program 1 times [2023-11-19 07:47:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727995868] [2023-11-19 07:47:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:31,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727995868] [2023-11-19 07:47:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727995868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045582658] [2023-11-19 07:47:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:31,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:31,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:47:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:32,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:32,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:32,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:32,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045582658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:32,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:32,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-19 07:47:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975238478] [2023-11-19 07:47:32,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:32,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:32,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:32,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:47:32,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:32,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 55 transitions, 471 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:32,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:32,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:32,296 INFO L124 PetriNetUnfolderBase]: 617/1012 cut-off events. [2023-11-19 07:47:32,296 INFO L125 PetriNetUnfolderBase]: For 2008/2008 co-relation queries the response was YES. [2023-11-19 07:47:32,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4285 conditions, 1012 events. 617/1012 cut-off events. For 2008/2008 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4511 event pairs, 79 based on Foata normal form. 138/1082 useless extension candidates. Maximal degree in co-relation 4024. Up to 578 conditions per place. [2023-11-19 07:47:32,309 INFO L140 encePairwiseOnDemand]: 148/157 looper letters, 43 selfloop transitions, 29 changer transitions 0/72 dead transitions. [2023-11-19 07:47:32,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 72 transitions, 737 flow [2023-11-19 07:47:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 339 transitions. [2023-11-19 07:47:32,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398089171974523 [2023-11-19 07:47:32,311 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 339 transitions. [2023-11-19 07:47:32,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 339 transitions. [2023-11-19 07:47:32,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:32,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 339 transitions. [2023-11-19 07:47:32,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,315 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,315 INFO L175 Difference]: Start difference. First operand has 42 places, 55 transitions, 471 flow. Second operand 4 states and 339 transitions. [2023-11-19 07:47:32,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 72 transitions, 737 flow [2023-11-19 07:47:32,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 72 transitions, 655 flow, removed 41 selfloop flow, removed 0 redundant places. [2023-11-19 07:47:32,330 INFO L231 Difference]: Finished difference. Result has 46 places, 61 transitions, 608 flow [2023-11-19 07:47:32,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=608, PETRI_PLACES=46, PETRI_TRANSITIONS=61} [2023-11-19 07:47:32,331 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2023-11-19 07:47:32,331 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 61 transitions, 608 flow [2023-11-19 07:47:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:32,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:32,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:32,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:47:32,557 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:32,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:32,558 INFO L85 PathProgramCache]: Analyzing trace with hash 263884752, now seen corresponding path program 1 times [2023-11-19 07:47:32,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:32,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95498198] [2023-11-19 07:47:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:32,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95498198] [2023-11-19 07:47:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95498198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:32,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:32,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:32,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617790874] [2023-11-19 07:47:32,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:32,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:32,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:32,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:32,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 61 transitions, 608 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:32,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:32,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:32,885 INFO L124 PetriNetUnfolderBase]: 719/1188 cut-off events. [2023-11-19 07:47:32,885 INFO L125 PetriNetUnfolderBase]: For 3935/3935 co-relation queries the response was YES. [2023-11-19 07:47:32,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5357 conditions, 1188 events. 719/1188 cut-off events. For 3935/3935 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5613 event pairs, 279 based on Foata normal form. 22/1132 useless extension candidates. Maximal degree in co-relation 5064. Up to 1013 conditions per place. [2023-11-19 07:47:32,902 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 76 selfloop transitions, 5 changer transitions 1/82 dead transitions. [2023-11-19 07:47:32,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 82 transitions, 933 flow [2023-11-19 07:47:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-19 07:47:32,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498938428874734 [2023-11-19 07:47:32,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-19 07:47:32,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-19 07:47:32,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:32,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-19 07:47:32,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,909 INFO L175 Difference]: Start difference. First operand has 46 places, 61 transitions, 608 flow. Second operand 3 states and 259 transitions. [2023-11-19 07:47:32,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 82 transitions, 933 flow [2023-11-19 07:47:32,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 860 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:32,937 INFO L231 Difference]: Finished difference. Result has 48 places, 65 transitions, 624 flow [2023-11-19 07:47:32,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=624, PETRI_PLACES=48, PETRI_TRANSITIONS=65} [2023-11-19 07:47:32,939 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2023-11-19 07:47:32,939 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 65 transitions, 624 flow [2023-11-19 07:47:32,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:32,940 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 07:47:32,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:47:32,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:32,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1054861904, now seen corresponding path program 2 times [2023-11-19 07:47:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:32,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085467234] [2023-11-19 07:47:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:33,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:33,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085467234] [2023-11-19 07:47:33,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085467234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:33,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491117377] [2023-11-19 07:47:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:33,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:33,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:33,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:47:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:33,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:47:33,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:33,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491117377] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:33,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:47:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593644918] [2023-11-19 07:47:33,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:47:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:33,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:47:33,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:47:33,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:33,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 65 transitions, 624 flow. Second operand has 13 states, 13 states have (on average 77.53846153846153) internal successors, (1008), 13 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:33,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:33,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:33,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:34,092 INFO L124 PetriNetUnfolderBase]: 1928/3277 cut-off events. [2023-11-19 07:47:34,092 INFO L125 PetriNetUnfolderBase]: For 9768/9768 co-relation queries the response was YES. [2023-11-19 07:47:34,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13582 conditions, 3277 events. 1928/3277 cut-off events. For 9768/9768 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19103 event pairs, 121 based on Foata normal form. 386/3313 useless extension candidates. Maximal degree in co-relation 13054. Up to 795 conditions per place. [2023-11-19 07:47:34,133 INFO L140 encePairwiseOnDemand]: 149/157 looper letters, 126 selfloop transitions, 143 changer transitions 6/275 dead transitions. [2023-11-19 07:47:34,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 275 transitions, 2666 flow [2023-11-19 07:47:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:47:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:47:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1165 transitions. [2023-11-19 07:47:34,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707986281234689 [2023-11-19 07:47:34,139 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1165 transitions. [2023-11-19 07:47:34,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1165 transitions. [2023-11-19 07:47:34,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:34,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1165 transitions. [2023-11-19 07:47:34,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 89.61538461538461) internal successors, (1165), 13 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:34,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:34,150 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:34,150 INFO L175 Difference]: Start difference. First operand has 48 places, 65 transitions, 624 flow. Second operand 13 states and 1165 transitions. [2023-11-19 07:47:34,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 275 transitions, 2666 flow [2023-11-19 07:47:34,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 275 transitions, 2644 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:34,194 INFO L231 Difference]: Finished difference. Result has 70 places, 181 transitions, 2465 flow [2023-11-19 07:47:34,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2465, PETRI_PLACES=70, PETRI_TRANSITIONS=181} [2023-11-19 07:47:34,196 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 44 predicate places. [2023-11-19 07:47:34,197 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 181 transitions, 2465 flow [2023-11-19 07:47:34,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 77.53846153846153) internal successors, (1008), 13 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:34,199 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 07:47:34,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:34,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:34,419 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:34,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1054861870, now seen corresponding path program 2 times [2023-11-19 07:47:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118248684] [2023-11-19 07:47:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:34,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:34,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118248684] [2023-11-19 07:47:34,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118248684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:34,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260879451] [2023-11-19 07:47:34,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:34,499 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:34,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:34,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:47:34,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:34,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:34,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:47:34,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260879451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:34,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:34,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-19 07:47:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508647286] [2023-11-19 07:47:34,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:34,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:47:34,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 157 [2023-11-19 07:47:34,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 181 transitions, 2465 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:34,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:34,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 157 [2023-11-19 07:47:34,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:35,075 INFO L124 PetriNetUnfolderBase]: 1249/2124 cut-off events. [2023-11-19 07:47:35,076 INFO L125 PetriNetUnfolderBase]: For 11146/11146 co-relation queries the response was YES. [2023-11-19 07:47:35,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10200 conditions, 2124 events. 1249/2124 cut-off events. For 11146/11146 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11029 event pairs, 749 based on Foata normal form. 228/2270 useless extension candidates. Maximal degree in co-relation 9692. Up to 2124 conditions per place. [2023-11-19 07:47:35,108 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 127 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-11-19 07:47:35,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 128 transitions, 1987 flow [2023-11-19 07:47:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-11-19 07:47:35,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159235668789809 [2023-11-19 07:47:35,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-11-19 07:47:35,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-11-19 07:47:35,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:35,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-11-19 07:47:35,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:35,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:35,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:35,114 INFO L175 Difference]: Start difference. First operand has 70 places, 181 transitions, 2465 flow. Second operand 3 states and 243 transitions. [2023-11-19 07:47:35,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 128 transitions, 1987 flow [2023-11-19 07:47:35,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 128 transitions, 1769 flow, removed 88 selfloop flow, removed 4 redundant places. [2023-11-19 07:47:35,191 INFO L231 Difference]: Finished difference. Result has 66 places, 128 transitions, 1515 flow [2023-11-19 07:47:35,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1515, PETRI_PLACES=66, PETRI_TRANSITIONS=128} [2023-11-19 07:47:35,192 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-11-19 07:47:35,193 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 128 transitions, 1515 flow [2023-11-19 07:47:35,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:35,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:35,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:35,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:35,408 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:35,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -409550616, now seen corresponding path program 1 times [2023-11-19 07:47:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840688913] [2023-11-19 07:47:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:35,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:35,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840688913] [2023-11-19 07:47:35,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840688913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:35,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678459413] [2023-11-19 07:47:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:35,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:35,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:35,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:35,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:47:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:35,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:35,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:35,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:35,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678459413] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:35,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:35,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2023-11-19 07:47:35,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106302891] [2023-11-19 07:47:35,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:35,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:47:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:47:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:47:35,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 157 [2023-11-19 07:47:35,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 128 transitions, 1515 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:35,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:35,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 157 [2023-11-19 07:47:35,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:36,157 INFO L124 PetriNetUnfolderBase]: 977/1656 cut-off events. [2023-11-19 07:47:36,157 INFO L125 PetriNetUnfolderBase]: For 7400/7400 co-relation queries the response was YES. [2023-11-19 07:47:36,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6900 conditions, 1656 events. 977/1656 cut-off events. For 7400/7400 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8332 event pairs, 175 based on Foata normal form. 94/1750 useless extension candidates. Maximal degree in co-relation 6869. Up to 1472 conditions per place. [2023-11-19 07:47:36,173 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 112 selfloop transitions, 4 changer transitions 6/122 dead transitions. [2023-11-19 07:47:36,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 122 transitions, 1558 flow [2023-11-19 07:47:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:47:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:47:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2023-11-19 07:47:36,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207006369426752 [2023-11-19 07:47:36,176 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 327 transitions. [2023-11-19 07:47:36,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 327 transitions. [2023-11-19 07:47:36,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:36,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 327 transitions. [2023-11-19 07:47:36,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.75) internal successors, (327), 4 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:36,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:36,179 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:36,180 INFO L175 Difference]: Start difference. First operand has 66 places, 128 transitions, 1515 flow. Second operand 4 states and 327 transitions. [2023-11-19 07:47:36,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 122 transitions, 1558 flow [2023-11-19 07:47:36,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 1539 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-19 07:47:36,214 INFO L231 Difference]: Finished difference. Result has 66 places, 98 transitions, 1156 flow [2023-11-19 07:47:36,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=66, PETRI_TRANSITIONS=98} [2023-11-19 07:47:36,215 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2023-11-19 07:47:36,215 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 98 transitions, 1156 flow [2023-11-19 07:47:36,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:36,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:36,216 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-19 07:47:36,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:36,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:47:36,437 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:36,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1791787792, now seen corresponding path program 3 times [2023-11-19 07:47:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:36,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211568214] [2023-11-19 07:47:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:36,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211568214] [2023-11-19 07:47:36,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211568214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302932902] [2023-11-19 07:47:36,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:47:36,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:36,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:36,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:36,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:47:36,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 07:47:36,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:36,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:47:36,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:36,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:37,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302932902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:37,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:37,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-19 07:47:37,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595118885] [2023-11-19 07:47:37,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:37,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:47:37,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:47:37,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:47:37,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:37,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 98 transitions, 1156 flow. Second operand has 25 states, 25 states have (on average 77.28) internal successors, (1932), 25 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:37,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:37,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:37,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:38,493 INFO L124 PetriNetUnfolderBase]: 2494/4367 cut-off events. [2023-11-19 07:47:38,493 INFO L125 PetriNetUnfolderBase]: For 59717/59717 co-relation queries the response was YES. [2023-11-19 07:47:38,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17189 conditions, 4367 events. 2494/4367 cut-off events. For 59717/59717 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 24801 event pairs, 183 based on Foata normal form. 578/4945 useless extension candidates. Maximal degree in co-relation 17160. Up to 1229 conditions per place. [2023-11-19 07:47:38,529 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 142 selfloop transitions, 242 changer transitions 66/450 dead transitions. [2023-11-19 07:47:38,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 450 transitions, 4583 flow [2023-11-19 07:47:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:47:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:47:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2183 transitions. [2023-11-19 07:47:38,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561783439490446 [2023-11-19 07:47:38,539 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2183 transitions. [2023-11-19 07:47:38,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2183 transitions. [2023-11-19 07:47:38,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:38,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2183 transitions. [2023-11-19 07:47:38,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 87.32) internal successors, (2183), 25 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:38,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:38,562 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:38,562 INFO L175 Difference]: Start difference. First operand has 66 places, 98 transitions, 1156 flow. Second operand 25 states and 2183 transitions. [2023-11-19 07:47:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 450 transitions, 4583 flow [2023-11-19 07:47:38,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 450 transitions, 4583 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:47:38,615 INFO L231 Difference]: Finished difference. Result has 112 places, 272 transitions, 4213 flow [2023-11-19 07:47:38,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4213, PETRI_PLACES=112, PETRI_TRANSITIONS=272} [2023-11-19 07:47:38,617 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2023-11-19 07:47:38,617 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 272 transitions, 4213 flow [2023-11-19 07:47:38,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.28) internal successors, (1932), 25 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:38,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:38,618 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-11-19 07:47:38,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:38,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:47:38,832 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:38,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1013135920, now seen corresponding path program 4 times [2023-11-19 07:47:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:38,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403660663] [2023-11-19 07:47:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:39,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403660663] [2023-11-19 07:47:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403660663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665880574] [2023-11-19 07:47:39,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:47:39,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:39,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:39,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:47:39,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:47:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:39,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:47:39,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:39,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:40,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665880574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:40,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:40,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-19 07:47:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913162973] [2023-11-19 07:47:40,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 07:47:40,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 07:47:40,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 07:47:40,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:40,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 272 transitions, 4213 flow. Second operand has 49 states, 49 states have (on average 77.14285714285714) internal successors, (3780), 49 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:40,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:40,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:40,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:45,729 INFO L124 PetriNetUnfolderBase]: 8110/14219 cut-off events. [2023-11-19 07:47:45,729 INFO L125 PetriNetUnfolderBase]: For 729299/729299 co-relation queries the response was YES. [2023-11-19 07:47:45,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62955 conditions, 14219 events. 8110/14219 cut-off events. For 729299/729299 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 91386 event pairs, 751 based on Foata normal form. 1226/15445 useless extension candidates. Maximal degree in co-relation 62902. Up to 4085 conditions per place. [2023-11-19 07:47:45,860 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 264 selfloop transitions, 882 changer transitions 138/1284 dead transitions. [2023-11-19 07:47:45,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1284 transitions, 17076 flow [2023-11-19 07:47:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 07:47:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-19 07:47:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4295 transitions. [2023-11-19 07:47:45,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558299753022228 [2023-11-19 07:47:45,876 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4295 transitions. [2023-11-19 07:47:45,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4295 transitions. [2023-11-19 07:47:45,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:45,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4295 transitions. [2023-11-19 07:47:45,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 87.65306122448979) internal successors, (4295), 49 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:45,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 157.0) internal successors, (7850), 50 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:45,917 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 157.0) internal successors, (7850), 50 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:45,917 INFO L175 Difference]: Start difference. First operand has 112 places, 272 transitions, 4213 flow. Second operand 49 states and 4295 transitions. [2023-11-19 07:47:45,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1284 transitions, 17076 flow [2023-11-19 07:47:46,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1284 transitions, 14793 flow, removed 1134 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:46,468 INFO L231 Difference]: Finished difference. Result has 204 places, 914 transitions, 14835 flow [2023-11-19 07:47:46,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14835, PETRI_PLACES=204, PETRI_TRANSITIONS=914} [2023-11-19 07:47:46,469 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 178 predicate places. [2023-11-19 07:47:46,469 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 914 transitions, 14835 flow [2023-11-19 07:47:46,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 77.14285714285714) internal successors, (3780), 49 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:46,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:46,472 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-11-19 07:47:46,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:46,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:47:46,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:47:46,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1891439792, now seen corresponding path program 5 times [2023-11-19 07:47:46,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:46,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380726518] [2023-11-19 07:47:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380726518] [2023-11-19 07:47:49,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380726518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278016188] [2023-11-19 07:47:49,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:47:49,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:49,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:49,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:49,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee46659-5d31-4ef8-ac92-7a2fc0877b85/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:47:49,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-19 07:47:49,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:49,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 07:47:49,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:49,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:52,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278016188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:52,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:52,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-19 07:47:52,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730401574] [2023-11-19 07:47:52,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:52,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-19 07:47:52,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:52,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-19 07:47:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-19 07:47:52,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 157 [2023-11-19 07:47:52,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 914 transitions, 14835 flow. Second operand has 97 states, 97 states have (on average 77.0721649484536) internal successors, (7476), 97 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:52,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:52,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 157 [2023-11-19 07:47:52,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand