./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.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_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/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_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/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_5d8c1985-f62f-43eb-94fe-81d09e94c063/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 ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:58:15,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:58:15,792 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:58:15,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:58:15,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:58:15,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:58:15,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:58:15,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:58:15,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:58:15,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:58:15,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:58:15,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:58:15,828 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:58:15,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:58:15,829 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:58:15,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:58:15,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:58:15,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:58:15,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:58:15,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:58:15,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:58:15,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:58:15,833 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:58:15,834 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:58:15,834 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:58:15,835 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:58:15,835 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:58:15,836 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:58:15,836 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:58:15,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:58:15,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:15,837 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:58:15,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:58:15,838 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:58:15,838 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:58:15,838 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:58:15,839 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:58:15,839 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:58:15,839 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:58:15,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:58:15,839 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:58:15,840 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_5d8c1985-f62f-43eb-94fe-81d09e94c063/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d [2023-11-19 07:58:16,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:58:16,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:58:16,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:58:16,164 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:58:16,164 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:58:16,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-19 07:58:19,271 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:58:19,592 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:58:19,592 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-19 07:58:19,602 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/data/5af298f41/637f7a79ddb4471d8ab0d42adcd62f13/FLAG92934151b [2023-11-19 07:58:19,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/data/5af298f41/637f7a79ddb4471d8ab0d42adcd62f13 [2023-11-19 07:58:19,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:58:19,631 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:58:19,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:19,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:58:19,638 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:58:19,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:19,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de14e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19, skipping insertion in model container [2023-11-19 07:58:19,640 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:19,670 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:58:19,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:19,897 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:58:19,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:58:19,940 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:58:19,940 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:58:19,949 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:58:19,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19 WrapperNode [2023-11-19 07:58:19,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:58:19,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:19,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:58:19,952 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:58:19,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:19,968 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,007 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 285 [2023-11-19 07:58:20,008 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:58:20,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:58:20,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:58:20,016 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:58:20,025 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,031 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,031 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,058 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:58:20,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:58:20,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:58:20,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:58:20,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (1/1) ... [2023-11-19 07:58:20,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:58:20,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:20,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:58:20,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:58:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:58:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:58:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:58:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:58:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:58:20,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:58:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:58:20,186 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:58:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:58:20,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:58:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:58:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:58:20,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:58:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:58:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:58:20,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:58:20,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:58:20,193 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 07:58:20,379 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:58:20,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:58:21,047 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:58:21,253 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:58:21,255 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 07:58:21,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:21 BoogieIcfgContainer [2023-11-19 07:58:21,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:58:21,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:58:21,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:58:21,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:58:21,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:58:19" (1/3) ... [2023-11-19 07:58:21,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a80ed25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:21, skipping insertion in model container [2023-11-19 07:58:21,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:58:19" (2/3) ... [2023-11-19 07:58:21,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a80ed25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:58:21, skipping insertion in model container [2023-11-19 07:58:21,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:58:21" (3/3) ... [2023-11-19 07:58:21,278 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-11-19 07:58:21,296 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:58:21,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:58:21,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-19 07:58:21,306 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:58:21,454 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:58:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 262 transitions, 545 flow [2023-11-19 07:58:21,652 INFO L124 PetriNetUnfolderBase]: 18/259 cut-off events. [2023-11-19 07:58:21,652 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:58:21,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 259 events. 18/259 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-11-19 07:58:21,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 262 transitions, 545 flow [2023-11-19 07:58:21,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 236 transitions, 490 flow [2023-11-19 07:58:21,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:58:21,699 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 236 transitions, 490 flow [2023-11-19 07:58:21,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 236 transitions, 490 flow [2023-11-19 07:58:21,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 236 transitions, 490 flow [2023-11-19 07:58:21,793 INFO L124 PetriNetUnfolderBase]: 17/236 cut-off events. [2023-11-19 07:58:21,793 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:58:21,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 236 events. 17/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 261 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 204. Up to 3 conditions per place. [2023-11-19 07:58:21,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 3850 [2023-11-19 07:58:32,714 INFO L134 LiptonReduction]: Checked pairs total: 8278 [2023-11-19 07:58:32,715 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-11-19 07:58:32,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:58:32,735 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;@53c7bbc5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:58:32,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-11-19 07:58:32,737 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:58:32,737 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:58:32,737 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:58:32,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:32,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:58:32,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:32,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash 38197, now seen corresponding path program 1 times [2023-11-19 07:58:32,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:32,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304021033] [2023-11-19 07:58:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:32,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:33,092 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 07:58:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304021033] [2023-11-19 07:58:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304021033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:33,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:33,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:33,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739868612] [2023-11-19 07:58:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:33,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:33,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 513 [2023-11-19 07:58:33,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 07:58:33,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:33,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 513 [2023-11-19 07:58:33,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:33,911 INFO L124 PetriNetUnfolderBase]: 2651/3791 cut-off events. [2023-11-19 07:58:33,911 INFO L125 PetriNetUnfolderBase]: For 229/229 co-relation queries the response was YES. [2023-11-19 07:58:33,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7810 conditions, 3791 events. 2651/3791 cut-off events. For 229/229 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 17208 event pairs, 2233 based on Foata normal form. 0/1652 useless extension candidates. Maximal degree in co-relation 6930. Up to 3789 conditions per place. [2023-11-19 07:58:33,985 INFO L140 encePairwiseOnDemand]: 498/513 looper letters, 46 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2023-11-19 07:58:33,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 51 transitions, 222 flow [2023-11-19 07:58:33,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 706 transitions. [2023-11-19 07:58:34,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587394411955815 [2023-11-19 07:58:34,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 706 transitions. [2023-11-19 07:58:34,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 706 transitions. [2023-11-19 07:58:34,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:34,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 706 transitions. [2023-11-19 07:58:34,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.33333333333334) internal successors, (706), 3 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:34,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:34,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:34,034 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 706 transitions. [2023-11-19 07:58:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 51 transitions, 222 flow [2023-11-19 07:58:34,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-19 07:58:34,052 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 144 flow [2023-11-19 07:58:34,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-11-19 07:58:34,060 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-19 07:58:34,060 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 144 flow [2023-11-19 07:58:34,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states 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 07:58:34,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:34,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:58:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:58:34,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:34,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1186282, now seen corresponding path program 1 times [2023-11-19 07:58:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302458493] [2023-11-19 07:58:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:34,197 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 07:58:34,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:34,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302458493] [2023-11-19 07:58:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302458493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:34,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467783491] [2023-11-19 07:58:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:34,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:34,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:34,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:34,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:58:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:34,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:34,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:34,352 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 07:58:34,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:34,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467783491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:34,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:34,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-19 07:58:34,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952736589] [2023-11-19 07:58:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:34,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:34,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:58:34,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 513 [2023-11-19 07:58:34,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 07:58:34,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:34,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 513 [2023-11-19 07:58:34,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:35,106 INFO L124 PetriNetUnfolderBase]: 2651/3789 cut-off events. [2023-11-19 07:58:35,107 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:58:35,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7676 conditions, 3789 events. 2651/3789 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 17231 event pairs, 2233 based on Foata normal form. 0/1654 useless extension candidates. Maximal degree in co-relation 7634. Up to 3781 conditions per place. [2023-11-19 07:58:35,140 INFO L140 encePairwiseOnDemand]: 506/513 looper letters, 43 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2023-11-19 07:58:35,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 234 flow [2023-11-19 07:58:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:58:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:58:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 911 transitions. [2023-11-19 07:58:35,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439571150097466 [2023-11-19 07:58:35,152 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 911 transitions. [2023-11-19 07:58:35,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 911 transitions. [2023-11-19 07:58:35,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:35,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 911 transitions. [2023-11-19 07:58:35,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.75) internal successors, (911), 4 states have internal predecessors, (911), 0 states have call successors, (0), 0 states 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 07:58:35,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 513.0) internal successors, (2565), 5 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states 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 07:58:35,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 513.0) internal successors, (2565), 5 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states 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 07:58:35,164 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 144 flow. Second operand 4 states and 911 transitions. [2023-11-19 07:58:35,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 234 flow [2023-11-19 07:58:35,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:35,168 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 138 flow [2023-11-19 07:58:35,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-11-19 07:58:35,169 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2023-11-19 07:58:35,169 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 138 flow [2023-11-19 07:58:35,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 07:58:35,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:35,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:58:35,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:58:35,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:35,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1186294, now seen corresponding path program 1 times [2023-11-19 07:58:35,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:35,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601782115] [2023-11-19 07:58:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:35,467 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 07:58:35,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:35,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601782115] [2023-11-19 07:58:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601782115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:35,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238423842] [2023-11-19 07:58:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:35,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:35,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:35,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:58:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:35,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:35,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:35,581 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 07:58:35,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:35,603 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 07:58:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238423842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:35,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:58:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806354871] [2023-11-19 07:58:35,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:35,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:58:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:35,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:58:35,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:58:35,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 513 [2023-11-19 07:58:35,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 216.14285714285714) internal successors, (1513), 7 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states 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 07:58:35,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:35,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 513 [2023-11-19 07:58:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:36,289 INFO L124 PetriNetUnfolderBase]: 2657/3801 cut-off events. [2023-11-19 07:58:36,289 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:58:36,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7719 conditions, 3801 events. 2657/3801 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 17288 event pairs, 2233 based on Foata normal form. 0/1667 useless extension candidates. Maximal degree in co-relation 7634. Up to 3790 conditions per place. [2023-11-19 07:58:36,318 INFO L140 encePairwiseOnDemand]: 506/513 looper letters, 44 selfloop transitions, 17 changer transitions 0/61 dead transitions. [2023-11-19 07:58:36,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 320 flow [2023-11-19 07:58:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:58:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:58:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1357 transitions. [2023-11-19 07:58:36,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44087069525666017 [2023-11-19 07:58:36,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1357 transitions. [2023-11-19 07:58:36,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1357 transitions. [2023-11-19 07:58:36,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:36,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1357 transitions. [2023-11-19 07:58:36,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 226.16666666666666) internal successors, (1357), 6 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states 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 07:58:36,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 513.0) internal successors, (3591), 7 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states 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 07:58:36,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 513.0) internal successors, (3591), 7 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states 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 07:58:36,339 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 138 flow. Second operand 6 states and 1357 transitions. [2023-11-19 07:58:36,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 320 flow [2023-11-19 07:58:36,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:36,342 INFO L231 Difference]: Finished difference. Result has 55 places, 61 transitions, 254 flow [2023-11-19 07:58:36,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=55, PETRI_TRANSITIONS=61} [2023-11-19 07:58:36,343 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-11-19 07:58:36,344 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 61 transitions, 254 flow [2023-11-19 07:58:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 216.14285714285714) internal successors, (1513), 7 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states 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 07:58:36,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:36,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:58:36,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:36,569 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:36,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 988487357, now seen corresponding path program 1 times [2023-11-19 07:58:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:36,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922947306] [2023-11-19 07:58:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:36,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:36,696 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 07:58:36,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:36,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922947306] [2023-11-19 07:58:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922947306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:36,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465676109] [2023-11-19 07:58:36,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:36,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:36,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:36,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 513 [2023-11-19 07:58:36,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 61 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 07:58:36,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:36,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 513 [2023-11-19 07:58:36,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:37,594 INFO L124 PetriNetUnfolderBase]: 3625/5053 cut-off events. [2023-11-19 07:58:37,594 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-19 07:58:37,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 5053 events. 3625/5053 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 23574 event pairs, 2233 based on Foata normal form. 0/2140 useless extension candidates. Maximal degree in co-relation 10211. Up to 4086 conditions per place. [2023-11-19 07:58:37,642 INFO L140 encePairwiseOnDemand]: 507/513 looper letters, 82 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-11-19 07:58:37,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 478 flow [2023-11-19 07:58:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 738 transitions. [2023-11-19 07:58:37,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47953216374269003 [2023-11-19 07:58:37,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 738 transitions. [2023-11-19 07:58:37,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 738 transitions. [2023-11-19 07:58:37,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:37,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 738 transitions. [2023-11-19 07:58:37,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states 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 07:58:37,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:37,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:37,657 INFO L175 Difference]: Start difference. First operand has 55 places, 61 transitions, 254 flow. Second operand 3 states and 738 transitions. [2023-11-19 07:58:37,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 478 flow [2023-11-19 07:58:37,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 452 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:37,662 INFO L231 Difference]: Finished difference. Result has 57 places, 64 transitions, 256 flow [2023-11-19 07:58:37,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=57, PETRI_TRANSITIONS=64} [2023-11-19 07:58:37,663 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-11-19 07:58:37,663 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 64 transitions, 256 flow [2023-11-19 07:58:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 07:58:37,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:37,664 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:58:37,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:58:37,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:37,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 982948481, now seen corresponding path program 2 times [2023-11-19 07:58:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:37,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709364982] [2023-11-19 07:58:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:37,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:37,794 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 07:58:37,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709364982] [2023-11-19 07:58:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709364982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056691957] [2023-11-19 07:58:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:37,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:37,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:37,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:37,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:58:37,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:58:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:37,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:58:37,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:37,922 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 07:58:37,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:37,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056691957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:37,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:37,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:58:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766009383] [2023-11-19 07:58:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:37,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:37,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:37,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:58:37,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 513 [2023-11-19 07:58:37,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 07:58:37,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:37,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 513 [2023-11-19 07:58:37,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:38,788 INFO L124 PetriNetUnfolderBase]: 3625/5051 cut-off events. [2023-11-19 07:58:38,788 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2023-11-19 07:58:38,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11956 conditions, 5051 events. 3625/5051 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 22741 event pairs, 2849 based on Foata normal form. 2/2424 useless extension candidates. Maximal degree in co-relation 11908. Up to 5036 conditions per place. [2023-11-19 07:58:38,831 INFO L140 encePairwiseOnDemand]: 509/513 looper letters, 56 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-11-19 07:58:38,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 360 flow [2023-11-19 07:58:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2023-11-19 07:58:38,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-11-19 07:58:38,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2023-11-19 07:58:38,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2023-11-19 07:58:38,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:38,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2023-11-19 07:58:38,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states 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 07:58:38,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:38,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:38,847 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 256 flow. Second operand 3 states and 702 transitions. [2023-11-19 07:58:38,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 360 flow [2023-11-19 07:58:38,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 324 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:38,852 INFO L231 Difference]: Finished difference. Result has 52 places, 62 transitions, 212 flow [2023-11-19 07:58:38,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=52, PETRI_TRANSITIONS=62} [2023-11-19 07:58:38,855 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2023-11-19 07:58:38,856 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 62 transitions, 212 flow [2023-11-19 07:58:38,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states 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 07:58:38,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:38,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:58:38,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:39,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:39,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:39,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:39,072 INFO L85 PathProgramCache]: Analyzing trace with hash 988487278, now seen corresponding path program 1 times [2023-11-19 07:58:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:39,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297563522] [2023-11-19 07:58:39,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:39,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:39,256 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 07:58:39,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:39,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297563522] [2023-11-19 07:58:39,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297563522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:39,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:39,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:39,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074426] [2023-11-19 07:58:39,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:39,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:39,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:39,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 513 [2023-11-19 07:58:39,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 07:58:39,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:39,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 513 [2023-11-19 07:58:39,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:40,272 INFO L124 PetriNetUnfolderBase]: 3712/5204 cut-off events. [2023-11-19 07:58:40,272 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2023-11-19 07:58:40,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11873 conditions, 5204 events. 3712/5204 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 23550 event pairs, 2924 based on Foata normal form. 88/2630 useless extension candidates. Maximal degree in co-relation 11438. Up to 5050 conditions per place. [2023-11-19 07:58:40,308 INFO L140 encePairwiseOnDemand]: 502/513 looper letters, 80 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2023-11-19 07:58:40,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 472 flow [2023-11-19 07:58:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1124 transitions. [2023-11-19 07:58:40,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382066276803119 [2023-11-19 07:58:40,314 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1124 transitions. [2023-11-19 07:58:40,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1124 transitions. [2023-11-19 07:58:40,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:40,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1124 transitions. [2023-11-19 07:58:40,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.8) internal successors, (1124), 5 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 07:58:40,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 07:58:40,326 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 07:58:40,327 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 212 flow. Second operand 5 states and 1124 transitions. [2023-11-19 07:58:40,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 472 flow [2023-11-19 07:58:40,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:58:40,331 INFO L231 Difference]: Finished difference. Result has 56 places, 64 transitions, 240 flow [2023-11-19 07:58:40,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=56, PETRI_TRANSITIONS=64} [2023-11-19 07:58:40,332 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-11-19 07:58:40,332 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 64 transitions, 240 flow [2023-11-19 07:58:40,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 07:58:40,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:40,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:58:40,334 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:40,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash 412172451, now seen corresponding path program 1 times [2023-11-19 07:58:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329113818] [2023-11-19 07:58:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,457 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 07:58:40,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329113818] [2023-11-19 07:58:40,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329113818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:40,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375644488] [2023-11-19 07:58:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:40,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:40,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:40,460 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:40,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:58:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:40,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:40,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:40,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:40,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375644488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:40,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:40,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-19 07:58:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398861044] [2023-11-19 07:58:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:40,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:58:40,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 513 [2023-11-19 07:58:40,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 64 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:40,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:40,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 513 [2023-11-19 07:58:40,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:41,057 INFO L124 PetriNetUnfolderBase]: 2302/3272 cut-off events. [2023-11-19 07:58:41,057 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2023-11-19 07:58:41,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7940 conditions, 3272 events. 2302/3272 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 13876 event pairs, 1800 based on Foata normal form. 256/1891 useless extension candidates. Maximal degree in co-relation 7562. Up to 3272 conditions per place. [2023-11-19 07:58:41,077 INFO L140 encePairwiseOnDemand]: 509/513 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-19 07:58:41,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 342 flow [2023-11-19 07:58:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-11-19 07:58:41,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46263807667316437 [2023-11-19 07:58:41,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-11-19 07:58:41,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-11-19 07:58:41,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:41,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-11-19 07:58:41,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 07:58:41,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:41,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:41,091 INFO L175 Difference]: Start difference. First operand has 56 places, 64 transitions, 240 flow. Second operand 3 states and 712 transitions. [2023-11-19 07:58:41,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 342 flow [2023-11-19 07:58:41,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 332 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:41,094 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 214 flow [2023-11-19 07:58:41,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-11-19 07:58:41,095 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-11-19 07:58:41,096 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 214 flow [2023-11-19 07:58:41,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:58:41,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:41,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:41,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:41,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:41,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:41,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash -107551095, now seen corresponding path program 1 times [2023-11-19 07:58:41,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:41,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279867899] [2023-11-19 07:58:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:41,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279867899] [2023-11-19 07:58:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279867899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834666770] [2023-11-19 07:58:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:41,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:41,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:58:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:41,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:58:41,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:41,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:41,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834666770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:41,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:41,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-11-19 07:58:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29778847] [2023-11-19 07:58:41,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:58:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:58:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:41,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 513 [2023-11-19 07:58:41,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 203.9090909090909) internal successors, (2243), 11 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states 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 07:58:41,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:41,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 513 [2023-11-19 07:58:41,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:43,501 INFO L124 PetriNetUnfolderBase]: 4061/5830 cut-off events. [2023-11-19 07:58:43,501 INFO L125 PetriNetUnfolderBase]: For 1149/1149 co-relation queries the response was YES. [2023-11-19 07:58:43,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13717 conditions, 5830 events. 4061/5830 cut-off events. For 1149/1149 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29439 event pairs, 1303 based on Foata normal form. 352/3466 useless extension candidates. Maximal degree in co-relation 13705. Up to 2372 conditions per place. [2023-11-19 07:58:43,541 INFO L140 encePairwiseOnDemand]: 502/513 looper letters, 220 selfloop transitions, 22 changer transitions 2/244 dead transitions. [2023-11-19 07:58:43,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 244 transitions, 1173 flow [2023-11-19 07:58:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:58:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:58:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3257 transitions. [2023-11-19 07:58:43,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42326185834957764 [2023-11-19 07:58:43,559 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3257 transitions. [2023-11-19 07:58:43,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3257 transitions. [2023-11-19 07:58:43,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:43,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3257 transitions. [2023-11-19 07:58:43,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 217.13333333333333) internal successors, (3257), 15 states have internal predecessors, (3257), 0 states have call successors, (0), 0 states 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 07:58:43,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 513.0) internal successors, (8208), 16 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states 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 07:58:43,597 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 513.0) internal successors, (8208), 16 states have internal predecessors, (8208), 0 states have call successors, (0), 0 states 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 07:58:43,597 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 214 flow. Second operand 15 states and 3257 transitions. [2023-11-19 07:58:43,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 244 transitions, 1173 flow [2023-11-19 07:58:43,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 244 transitions, 1172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:43,606 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 354 flow [2023-11-19 07:58:43,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=354, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-11-19 07:58:43,608 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-11-19 07:58:43,609 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 354 flow [2023-11-19 07:58:43,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 203.9090909090909) internal successors, (2243), 11 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states 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 07:58:43,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:43,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:43,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:43,821 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:43,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1049844579, now seen corresponding path program 1 times [2023-11-19 07:58:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:43,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123696037] [2023-11-19 07:58:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:44,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123696037] [2023-11-19 07:58:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123696037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894971448] [2023-11-19 07:58:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:44,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:44,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:44,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:44,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:58:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:44,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:58:44,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:58:44,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:44,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894971448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:44,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:44,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-19 07:58:44,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724155367] [2023-11-19 07:58:44,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:44,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:58:44,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:58:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:58:44,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 513 [2023-11-19 07:58:44,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states 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 07:58:44,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:44,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 513 [2023-11-19 07:58:44,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:45,157 INFO L124 PetriNetUnfolderBase]: 3625/5266 cut-off events. [2023-11-19 07:58:45,158 INFO L125 PetriNetUnfolderBase]: For 2581/2581 co-relation queries the response was YES. [2023-11-19 07:58:45,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14828 conditions, 5266 events. 3625/5266 cut-off events. For 2581/2581 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 26522 event pairs, 1185 based on Foata normal form. 256/3218 useless extension candidates. Maximal degree in co-relation 14809. Up to 2487 conditions per place. [2023-11-19 07:58:45,198 INFO L140 encePairwiseOnDemand]: 509/513 looper letters, 119 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2023-11-19 07:58:45,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 130 transitions, 742 flow [2023-11-19 07:58:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1215 transitions. [2023-11-19 07:58:45,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-11-19 07:58:45,204 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1215 transitions. [2023-11-19 07:58:45,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1215 transitions. [2023-11-19 07:58:45,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:45,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1215 transitions. [2023-11-19 07:58:45,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states 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 07:58:45,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 07:58:45,217 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 07:58:45,217 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 354 flow. Second operand 5 states and 1215 transitions. [2023-11-19 07:58:45,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 130 transitions, 742 flow [2023-11-19 07:58:45,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 130 transitions, 704 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:45,264 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 322 flow [2023-11-19 07:58:45,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-11-19 07:58:45,265 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2023-11-19 07:58:45,266 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 322 flow [2023-11-19 07:58:45,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states 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 07:58:45,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:45,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:45,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:45,488 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:45,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 21611353, now seen corresponding path program 1 times [2023-11-19 07:58:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:45,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061602678] [2023-11-19 07:58:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:45,548 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 07:58:45,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:45,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061602678] [2023-11-19 07:58:45,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061602678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:45,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:45,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:58:45,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814900620] [2023-11-19 07:58:45,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:45,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:45,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 513 [2023-11-19 07:58:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 07:58:45,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:45,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 513 [2023-11-19 07:58:45,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:46,400 INFO L124 PetriNetUnfolderBase]: 4069/5894 cut-off events. [2023-11-19 07:58:46,400 INFO L125 PetriNetUnfolderBase]: For 7692/7692 co-relation queries the response was YES. [2023-11-19 07:58:46,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16748 conditions, 5894 events. 4069/5894 cut-off events. For 7692/7692 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28695 event pairs, 1025 based on Foata normal form. 152/3712 useless extension candidates. Maximal degree in co-relation 16730. Up to 4635 conditions per place. [2023-11-19 07:58:46,449 INFO L140 encePairwiseOnDemand]: 503/513 looper letters, 82 selfloop transitions, 5 changer transitions 6/93 dead transitions. [2023-11-19 07:58:46,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 613 flow [2023-11-19 07:58:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-11-19 07:58:46,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710851202079272 [2023-11-19 07:58:46,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-11-19 07:58:46,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-11-19 07:58:46,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:46,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-11-19 07:58:46,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states 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 07:58:46,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:46,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:46,463 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 322 flow. Second operand 3 states and 725 transitions. [2023-11-19 07:58:46,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 613 flow [2023-11-19 07:58:46,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 581 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:46,473 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 302 flow [2023-11-19 07:58:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2023-11-19 07:58:46,475 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2023-11-19 07:58:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 302 flow [2023-11-19 07:58:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 07:58:46,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:46,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:46,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:58:46,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1049844540, now seen corresponding path program 2 times [2023-11-19 07:58:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331254876] [2023-11-19 07:58:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:58:46,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:46,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331254876] [2023-11-19 07:58:46,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331254876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013664985] [2023-11-19 07:58:46,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:58:46,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:46,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:46,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:46,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:58:46,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:58:46,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:58:46,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:58:46,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:58:46,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:58:46,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013664985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:46,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:58:46,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-19 07:58:46,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008239061] [2023-11-19 07:58:46,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:46,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:46,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:58:46,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 513 [2023-11-19 07:58:46,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 07:58:46,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:46,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 513 [2023-11-19 07:58:46,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:47,390 INFO L124 PetriNetUnfolderBase]: 3673/5314 cut-off events. [2023-11-19 07:58:47,390 INFO L125 PetriNetUnfolderBase]: For 5630/5630 co-relation queries the response was YES. [2023-11-19 07:58:47,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16078 conditions, 5314 events. 3673/5314 cut-off events. For 5630/5630 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25438 event pairs, 2294 based on Foata normal form. 0/3526 useless extension candidates. Maximal degree in co-relation 16058. Up to 5314 conditions per place. [2023-11-19 07:58:47,423 INFO L140 encePairwiseOnDemand]: 511/513 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-11-19 07:58:47,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 428 flow [2023-11-19 07:58:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-11-19 07:58:47,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600389863547758 [2023-11-19 07:58:47,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-11-19 07:58:47,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-11-19 07:58:47,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:47,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-11-19 07:58:47,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 07:58:47,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:47,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:47,434 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 302 flow. Second operand 3 states and 708 transitions. [2023-11-19 07:58:47,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 428 flow [2023-11-19 07:58:47,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 415 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-19 07:58:47,440 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 283 flow [2023-11-19 07:58:47,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2023-11-19 07:58:47,441 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2023-11-19 07:58:47,441 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 283 flow [2023-11-19 07:58:47,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 07:58:47,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:47,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:47,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:47,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:47,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:47,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash -208995789, now seen corresponding path program 1 times [2023-11-19 07:58:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:47,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102605415] [2023-11-19 07:58:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:47,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:47,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102605415] [2023-11-19 07:58:47,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102605415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:47,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:47,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:58:47,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457957166] [2023-11-19 07:58:47,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:47,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:58:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:58:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:58:47,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 513 [2023-11-19 07:58:47,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 07:58:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:47,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 513 [2023-11-19 07:58:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:48,196 INFO L124 PetriNetUnfolderBase]: 2297/3394 cut-off events. [2023-11-19 07:58:48,196 INFO L125 PetriNetUnfolderBase]: For 3535/3535 co-relation queries the response was YES. [2023-11-19 07:58:48,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10113 conditions, 3394 events. 2297/3394 cut-off events. For 3535/3535 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15596 event pairs, 654 based on Foata normal form. 24/2286 useless extension candidates. Maximal degree in co-relation 10094. Up to 3255 conditions per place. [2023-11-19 07:58:48,216 INFO L140 encePairwiseOnDemand]: 509/513 looper letters, 66 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-11-19 07:58:48,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 71 transitions, 426 flow [2023-11-19 07:58:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:58:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:58:48,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2023-11-19 07:58:48,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619883040935672 [2023-11-19 07:58:48,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2023-11-19 07:58:48,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2023-11-19 07:58:48,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:48,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2023-11-19 07:58:48,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states 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 07:58:48,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:48,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 07:58:48,227 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 283 flow. Second operand 3 states and 711 transitions. [2023-11-19 07:58:48,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 71 transitions, 426 flow [2023-11-19 07:58:48,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 421 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 07:58:48,233 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 280 flow [2023-11-19 07:58:48,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-11-19 07:58:48,235 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-11-19 07:58:48,235 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 280 flow [2023-11-19 07:58:48,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states 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 07:58:48,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:48,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:48,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:58:48,238 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:48,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash -197245523, now seen corresponding path program 1 times [2023-11-19 07:58:48,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:48,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624682017] [2023-11-19 07:58:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:48,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624682017] [2023-11-19 07:58:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624682017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:58:48,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:58:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:58:48,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854935155] [2023-11-19 07:58:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:58:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:58:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:58:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:58:48,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 513 [2023-11-19 07:58:48,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 07:58:48,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:48,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 513 [2023-11-19 07:58:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:48,885 INFO L124 PetriNetUnfolderBase]: 2573/3852 cut-off events. [2023-11-19 07:58:48,885 INFO L125 PetriNetUnfolderBase]: For 5084/5084 co-relation queries the response was YES. [2023-11-19 07:58:48,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11899 conditions, 3852 events. 2573/3852 cut-off events. For 5084/5084 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17867 event pairs, 1560 based on Foata normal form. 76/2796 useless extension candidates. Maximal degree in co-relation 11878. Up to 3383 conditions per place. [2023-11-19 07:58:48,910 INFO L140 encePairwiseOnDemand]: 501/513 looper letters, 56 selfloop transitions, 7 changer transitions 22/85 dead transitions. [2023-11-19 07:58:48,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 554 flow [2023-11-19 07:58:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:58:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:58:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1117 transitions. [2023-11-19 07:58:48,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354775828460039 [2023-11-19 07:58:48,916 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1117 transitions. [2023-11-19 07:58:48,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1117 transitions. [2023-11-19 07:58:48,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:48,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1117 transitions. [2023-11-19 07:58:48,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.4) internal successors, (1117), 5 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states 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 07:58:48,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 07:58:48,926 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 513.0) internal successors, (3078), 6 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states 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 07:58:48,926 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 280 flow. Second operand 5 states and 1117 transitions. [2023-11-19 07:58:48,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 554 flow [2023-11-19 07:58:48,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 515 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-19 07:58:48,934 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 288 flow [2023-11-19 07:58:48,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-11-19 07:58:48,935 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-11-19 07:58:48,935 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 288 flow [2023-11-19 07:58:48,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 07:58:48,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:48,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:48,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:58:48,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:48,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1488742829, now seen corresponding path program 1 times [2023-11-19 07:58:48,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:48,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125190719] [2023-11-19 07:58:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:48,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:49,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125190719] [2023-11-19 07:58:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125190719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117814508] [2023-11-19 07:58:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:49,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:49,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:49,342 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:49,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:58:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:49,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:58:49,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:49,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:58:49,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:58:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:58:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:58:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:58:49,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:58:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:58:49,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:49,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-19 07:58:49,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 07:58:49,775 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:58:49,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:58:49,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:49,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:49,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:49,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:58:50,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:58:50,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-19 07:58:50,493 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-19 07:58:50,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 644 treesize of output 615 [2023-11-19 07:58:50,539 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:58:50,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 248 [2023-11-19 07:58:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:58:50,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 170 [2023-11-19 07:58:50,578 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:58:50,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 157 [2023-11-19 07:58:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:50,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117814508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:58:50,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:58:50,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-11-19 07:58:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109689569] [2023-11-19 07:58:50,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:58:50,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:58:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:58:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:58:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=383, Unknown=11, NotChecked=0, Total=506 [2023-11-19 07:58:51,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 513 [2023-11-19 07:58:51,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 288 flow. Second operand has 23 states, 23 states have (on average 158.69565217391303) internal successors, (3650), 23 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states 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 07:58:51,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:58:51,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 513 [2023-11-19 07:58:51,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:58:54,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:58:57,680 INFO L124 PetriNetUnfolderBase]: 2557/3835 cut-off events. [2023-11-19 07:58:57,680 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2023-11-19 07:58:57,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11642 conditions, 3835 events. 2557/3835 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18791 event pairs, 401 based on Foata normal form. 0/2562 useless extension candidates. Maximal degree in co-relation 11623. Up to 1273 conditions per place. [2023-11-19 07:58:57,718 INFO L140 encePairwiseOnDemand]: 496/513 looper letters, 181 selfloop transitions, 61 changer transitions 0/242 dead transitions. [2023-11-19 07:58:57,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 242 transitions, 1417 flow [2023-11-19 07:58:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:58:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-19 07:58:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3671 transitions. [2023-11-19 07:58:57,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3252702463228779 [2023-11-19 07:58:57,738 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3671 transitions. [2023-11-19 07:58:57,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3671 transitions. [2023-11-19 07:58:57,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:58:57,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3671 transitions. [2023-11-19 07:58:57,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 166.86363636363637) internal successors, (3671), 22 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states 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 07:58:57,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 513.0) internal successors, (11799), 23 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states 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 07:58:57,782 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 513.0) internal successors, (11799), 23 states have internal predecessors, (11799), 0 states have call successors, (0), 0 states 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 07:58:57,783 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 288 flow. Second operand 22 states and 3671 transitions. [2023-11-19 07:58:57,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 242 transitions, 1417 flow [2023-11-19 07:58:57,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 242 transitions, 1327 flow, removed 34 selfloop flow, removed 4 redundant places. [2023-11-19 07:58:57,796 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 706 flow [2023-11-19 07:58:57,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=706, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2023-11-19 07:58:57,797 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2023-11-19 07:58:57,797 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 706 flow [2023-11-19 07:58:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 158.69565217391303) internal successors, (3650), 23 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states 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 07:58:57,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:58:57,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:58:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:58:58,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:58:58,026 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 44 more)] === [2023-11-19 07:58:58,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:58:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1565443646, now seen corresponding path program 1 times [2023-11-19 07:58:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:58:58,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48521812] [2023-11-19 07:58:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:58:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:58:58,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:58:58,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48521812] [2023-11-19 07:58:58,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48521812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:58:58,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037008926] [2023-11-19 07:58:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:58:58,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:58:58,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:58:58,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:58:58,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d8c1985-f62f-43eb-94fe-81d09e94c063/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:58:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:58:58,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 07:58:58,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:58:58,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 07:58:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-19 07:58:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:58:58,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:58,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-19 07:58:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:58:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:58:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 07:58:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-19 07:58:59,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 07:58:59,228 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:58:59,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 07:58:59,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:59,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:58:59,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:58:59,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-19 07:58:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:58:59,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:00,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:59:00,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-11-19 07:59:00,461 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:59:00,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 208 [2023-11-19 07:59:00,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2023-11-19 07:59:00,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:59:00,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 160 [2023-11-19 07:59:00,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:59:00,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 101 [2023-11-19 07:59:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:01,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037008926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:01,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:01,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-11-19 07:59:01,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037054503] [2023-11-19 07:59:01,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:01,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:59:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:59:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=462, Unknown=5, NotChecked=0, Total=552 [2023-11-19 07:59:02,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 513 [2023-11-19 07:59:02,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 706 flow. Second operand has 24 states, 24 states have (on average 158.625) internal successors, (3807), 24 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states 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 07:59:02,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:02,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 513 [2023-11-19 07:59:02,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand