./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/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_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/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_297250dc-faec-4f21-8ff3-3e3ce52ceac5/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 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:46:42,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:46:42,334 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:46:42,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:46:42,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:46:42,390 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:46:42,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:46:42,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:46:42,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:46:42,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:46:42,401 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:46:42,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:46:42,402 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:46:42,404 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:46:42,405 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:46:42,405 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:46:42,406 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:46:42,407 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:46:42,407 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:46:42,408 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:46:42,408 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:46:42,409 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:46:42,409 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:46:42,410 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:46:42,410 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:46:42,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:46:42,411 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:46:42,412 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:46:42,413 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:46:42,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:46:42,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:42,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:46:42,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:46:42,415 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:46:42,416 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:46:42,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:46:42,416 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:46:42,434 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:46:42,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:46:42,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:46:42,434 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:46:42,437 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_297250dc-faec-4f21-8ff3-3e3ce52ceac5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2023-11-19 07:46:42,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:46:42,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:46:42,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:46:42,819 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:46:42,819 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:46:42,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2023-11-19 07:46:46,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:46:46,302 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:46:46,313 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2023-11-19 07:46:46,326 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/data/8cb69bae0/cc6b99c725194dcd870953e4f67046e8/FLAG22caadae5 [2023-11-19 07:46:46,342 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/data/8cb69bae0/cc6b99c725194dcd870953e4f67046e8 [2023-11-19 07:46:46,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:46:46,347 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:46:46,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:46,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:46:46,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:46:46,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b8b125f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46, skipping insertion in model container [2023-11-19 07:46:46,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,405 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:46:46,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:46,613 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:46:46,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:46,680 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:46:46,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46 WrapperNode [2023-11-19 07:46:46,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:46,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:46,682 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:46:46,682 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:46:46,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,699 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,743 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 371 [2023-11-19 07:46:46,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:46,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:46:46,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:46:46,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:46:46,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,760 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,798 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,801 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:46:46,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:46:46,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:46:46,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:46:46,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (1/1) ... [2023-11-19 07:46:46,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:46,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:46,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:46:46,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:46:46,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:46:46,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:46:46,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:46:46,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:46:46,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:46:46,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:46:46,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:46:46,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:46:46,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 07:46:46,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 07:46:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:46:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:46:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:46:46,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:46:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:46:46,916 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 07:46:47,106 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:46:47,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:46:47,705 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:46:47,723 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:46:47,723 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:46:47,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:47 BoogieIcfgContainer [2023-11-19 07:46:47,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:46:47,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:46:47,734 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:46:47,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:46:47,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:46" (1/3) ... [2023-11-19 07:46:47,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee47c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:47, skipping insertion in model container [2023-11-19 07:46:47,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:46" (2/3) ... [2023-11-19 07:46:47,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee47c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:47, skipping insertion in model container [2023-11-19 07:46:47,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:47" (3/3) ... [2023-11-19 07:46:47,741 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2023-11-19 07:46:47,758 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:46:47,770 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:46:47,771 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-19 07:46:47,772 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:46:47,971 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:46:48,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 456 places, 478 transitions, 977 flow [2023-11-19 07:46:48,271 INFO L124 PetriNetUnfolderBase]: 32/475 cut-off events. [2023-11-19 07:46:48,271 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:46:48,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 475 events. 32/475 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1360 event pairs, 0 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 347. Up to 2 conditions per place. [2023-11-19 07:46:48,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 478 transitions, 977 flow [2023-11-19 07:46:48,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 430 places, 451 transitions, 917 flow [2023-11-19 07:46:48,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:46:48,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 430 places, 451 transitions, 917 flow [2023-11-19 07:46:48,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 430 places, 451 transitions, 917 flow [2023-11-19 07:46:48,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 430 places, 451 transitions, 917 flow [2023-11-19 07:46:48,489 INFO L124 PetriNetUnfolderBase]: 31/451 cut-off events. [2023-11-19 07:46:48,490 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:46:48,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 451 events. 31/451 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1352 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 347. Up to 2 conditions per place. [2023-11-19 07:46:48,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 64680 [2023-11-19 07:47:14,091 INFO L134 LiptonReduction]: Checked pairs total: 60988 [2023-11-19 07:47:14,091 INFO L136 LiptonReduction]: Total number of compositions: 590 [2023-11-19 07:47:14,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:47:14,134 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;@412f2ebc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:47:14,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-11-19 07:47:14,150 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:47:14,150 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:47:14,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:47:14,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:14,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:47:14,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:14,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash 64238, now seen corresponding path program 1 times [2023-11-19 07:47:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:14,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180217535] [2023-11-19 07:47:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:14,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:14,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:14,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180217535] [2023-11-19 07:47:14,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180217535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:14,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:14,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:47:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581065456] [2023-11-19 07:47:14,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:14,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:14,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:14,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 1068 [2023-11-19 07:47:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 447.6666666666667) internal successors, (1343), 3 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:14,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 1068 [2023-11-19 07:47:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:15,685 INFO L124 PetriNetUnfolderBase]: 3107/4424 cut-off events. [2023-11-19 07:47:15,685 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-11-19 07:47:15,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9071 conditions, 4424 events. 3107/4424 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 20996 event pairs, 2653 based on Foata normal form. 0/1708 useless extension candidates. Maximal degree in co-relation 8144. Up to 4424 conditions per place. [2023-11-19 07:47:15,755 INFO L140 encePairwiseOnDemand]: 1054/1068 looper letters, 38 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-11-19 07:47:15,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 179 flow [2023-11-19 07:47:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1393 transitions. [2023-11-19 07:47:15,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434769038701623 [2023-11-19 07:47:15,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1393 transitions. [2023-11-19 07:47:15,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1393 transitions. [2023-11-19 07:47:15,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:15,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1393 transitions. [2023-11-19 07:47:15,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 464.3333333333333) internal successors, (1393), 3 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:15,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:15,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:15,822 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 111 flow. Second operand 3 states and 1393 transitions. [2023-11-19 07:47:15,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 179 flow [2023-11-19 07:47:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 170 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-19 07:47:15,840 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 105 flow [2023-11-19 07:47:15,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-19 07:47:15,848 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-11-19 07:47:15,848 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 105 flow [2023-11-19 07:47:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 447.6666666666667) internal successors, (1343), 3 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:15,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:15,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:47:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:47:15,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:15,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1993213, now seen corresponding path program 1 times [2023-11-19 07:47:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:15,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900284429] [2023-11-19 07:47:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:15,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:16,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900284429] [2023-11-19 07:47:16,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900284429] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181844455] [2023-11-19 07:47:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:16,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:16,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:16,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:47:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:16,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:16,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:16,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:16,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181844455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:16,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:16,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:47:16,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357004112] [2023-11-19 07:47:16,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:16,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:47:16,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:16,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:47:16,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:16,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 1068 [2023-11-19 07:47:16,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 105 flow. Second operand has 7 states, 7 states have (on average 448.14285714285717) internal successors, (3137), 7 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:16,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:16,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 1068 [2023-11-19 07:47:16,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:17,478 INFO L124 PetriNetUnfolderBase]: 3113/4433 cut-off events. [2023-11-19 07:47:17,478 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-19 07:47:17,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9025 conditions, 4433 events. 3113/4433 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 21026 event pairs, 2653 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 8971. Up to 4426 conditions per place. [2023-11-19 07:47:17,517 INFO L140 encePairwiseOnDemand]: 1063/1068 looper letters, 37 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2023-11-19 07:47:17,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 241 flow [2023-11-19 07:47:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:47:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:47:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3182 transitions. [2023-11-19 07:47:17,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4256286784376672 [2023-11-19 07:47:17,531 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3182 transitions. [2023-11-19 07:47:17,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3182 transitions. [2023-11-19 07:47:17,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:17,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3182 transitions. [2023-11-19 07:47:17,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 454.57142857142856) internal successors, (3182), 7 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:17,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1068.0) internal successors, (8544), 8 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:17,579 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1068.0) internal successors, (8544), 8 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:17,579 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 105 flow. Second operand 7 states and 3182 transitions. [2023-11-19 07:47:17,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 241 flow [2023-11-19 07:47:17,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 236 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:17,583 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 184 flow [2023-11-19 07:47:17,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-19 07:47:17,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-11-19 07:47:17,588 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 184 flow [2023-11-19 07:47:17,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 448.14285714285717) internal successors, (3137), 7 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:17,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:17,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-19 07:47:17,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:17,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 61791436, now seen corresponding path program 1 times [2023-11-19 07:47:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:17,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745857112] [2023-11-19 07:47:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:47:17,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745857112] [2023-11-19 07:47:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745857112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:17,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:17,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816538699] [2023-11-19 07:47:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:17,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:17,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 1068 [2023-11-19 07:47:17,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 448.3333333333333) internal successors, (1345), 3 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:17,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:17,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 1068 [2023-11-19 07:47:17,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:18,981 INFO L124 PetriNetUnfolderBase]: 3110/4429 cut-off events. [2023-11-19 07:47:18,982 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-19 07:47:18,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9033 conditions, 4429 events. 3110/4429 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 21033 event pairs, 2653 based on Foata normal form. 0/1715 useless extension candidates. Maximal degree in co-relation 8997. Up to 4423 conditions per place. [2023-11-19 07:47:19,027 INFO L140 encePairwiseOnDemand]: 1065/1068 looper letters, 40 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2023-11-19 07:47:19,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 249 flow [2023-11-19 07:47:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1380 transitions. [2023-11-19 07:47:19,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307116104868914 [2023-11-19 07:47:19,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1380 transitions. [2023-11-19 07:47:19,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1380 transitions. [2023-11-19 07:47:19,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:19,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1380 transitions. [2023-11-19 07:47:19,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 460.0) internal successors, (1380), 3 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:19,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:19,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:19,055 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 184 flow. Second operand 3 states and 1380 transitions. [2023-11-19 07:47:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 249 flow [2023-11-19 07:47:19,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 228 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:19,061 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 148 flow [2023-11-19 07:47:19,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-19 07:47:19,065 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2023-11-19 07:47:19,065 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 148 flow [2023-11-19 07:47:19,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 448.3333333333333) internal successors, (1345), 3 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:19,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:19,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:47:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:47:19,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:19,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1914713331, now seen corresponding path program 1 times [2023-11-19 07:47:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187813283] [2023-11-19 07:47:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:19,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187813283] [2023-11-19 07:47:19,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187813283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:19,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:19,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:19,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652996882] [2023-11-19 07:47:19,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:19,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 446 out of 1068 [2023-11-19 07:47:19,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 447.6666666666667) internal successors, (1343), 3 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:19,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:19,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 446 of 1068 [2023-11-19 07:47:19,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:20,112 INFO L124 PetriNetUnfolderBase]: 3109/4428 cut-off events. [2023-11-19 07:47:20,112 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-19 07:47:20,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9025 conditions, 4428 events. 3109/4428 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 20981 event pairs, 2653 based on Foata normal form. 1/1717 useless extension candidates. Maximal degree in co-relation 8995. Up to 4428 conditions per place. [2023-11-19 07:47:20,142 INFO L140 encePairwiseOnDemand]: 1065/1068 looper letters, 43 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 07:47:20,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 231 flow [2023-11-19 07:47:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1378 transitions. [2023-11-19 07:47:20,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43008739076154806 [2023-11-19 07:47:20,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1378 transitions. [2023-11-19 07:47:20,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1378 transitions. [2023-11-19 07:47:20,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:20,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1378 transitions. [2023-11-19 07:47:20,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 459.3333333333333) internal successors, (1378), 3 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:20,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:20,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:20,166 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 148 flow. Second operand 3 states and 1378 transitions. [2023-11-19 07:47:20,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 231 flow [2023-11-19 07:47:20,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:20,168 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 135 flow [2023-11-19 07:47:20,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-11-19 07:47:20,169 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2023-11-19 07:47:20,169 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 135 flow [2023-11-19 07:47:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 447.6666666666667) internal successors, (1343), 3 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:20,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:20,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:47:20,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:47:20,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:20,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -748734606, now seen corresponding path program 1 times [2023-11-19 07:47:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:20,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50727998] [2023-11-19 07:47:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:20,226 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 07:47:20,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:20,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50727998] [2023-11-19 07:47:20,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50727998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:20,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:20,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713109032] [2023-11-19 07:47:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:20,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:20,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 1068 [2023-11-19 07:47:20,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:20,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:20,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 1068 [2023-11-19 07:47:20,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:21,370 INFO L124 PetriNetUnfolderBase]: 4089/5844 cut-off events. [2023-11-19 07:47:21,371 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-19 07:47:21,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11888 conditions, 5844 events. 4089/5844 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 30354 event pairs, 2653 based on Foata normal form. 0/2373 useless extension candidates. Maximal degree in co-relation 11872. Up to 4429 conditions per place. [2023-11-19 07:47:21,414 INFO L140 encePairwiseOnDemand]: 1061/1068 looper letters, 70 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-19 07:47:21,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 338 flow [2023-11-19 07:47:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1414 transitions. [2023-11-19 07:47:21,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44132334581772786 [2023-11-19 07:47:21,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1414 transitions. [2023-11-19 07:47:21,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1414 transitions. [2023-11-19 07:47:21,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:21,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1414 transitions. [2023-11-19 07:47:21,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 471.3333333333333) internal successors, (1414), 3 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:21,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:21,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:21,439 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 135 flow. Second operand 3 states and 1414 transitions. [2023-11-19 07:47:21,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 338 flow [2023-11-19 07:47:21,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:21,443 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 151 flow [2023-11-19 07:47:21,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-19 07:47:21,444 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-11-19 07:47:21,444 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 151 flow [2023-11-19 07:47:21,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:21,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:21,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:47:21,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:47:21,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:21,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:21,446 INFO L85 PathProgramCache]: Analyzing trace with hash -747911506, now seen corresponding path program 2 times [2023-11-19 07:47:21,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:21,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357259891] [2023-11-19 07:47:21,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:21,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:47:21,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:21,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357259891] [2023-11-19 07:47:21,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357259891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:21,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503811102] [2023-11-19 07:47:21,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:21,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:21,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:47:21,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:47:21,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:21,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:21,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:47:21,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:21,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503811102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:21,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:21,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:47:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109468067] [2023-11-19 07:47:21,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:21,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:21,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:21,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:21,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:47:21,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 1068 [2023-11-19 07:47:21,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:21,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:21,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 1068 [2023-11-19 07:47:21,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:22,627 INFO L124 PetriNetUnfolderBase]: 4089/5843 cut-off events. [2023-11-19 07:47:22,627 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2023-11-19 07:47:22,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13195 conditions, 5843 events. 4089/5843 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 29244 event pairs, 3531 based on Foata normal form. 1/2665 useless extension candidates. Maximal degree in co-relation 13172. Up to 5838 conditions per place. [2023-11-19 07:47:22,666 INFO L140 encePairwiseOnDemand]: 1065/1068 looper letters, 40 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2023-11-19 07:47:22,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 231 flow [2023-11-19 07:47:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1385 transitions. [2023-11-19 07:47:22,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4322721598002497 [2023-11-19 07:47:22,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1385 transitions. [2023-11-19 07:47:22,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1385 transitions. [2023-11-19 07:47:22,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:22,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1385 transitions. [2023-11-19 07:47:22,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 461.6666666666667) internal successors, (1385), 3 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:22,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:22,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:22,688 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 151 flow. Second operand 3 states and 1385 transitions. [2023-11-19 07:47:22,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 231 flow [2023-11-19 07:47:22,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 214 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-19 07:47:22,690 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 134 flow [2023-11-19 07:47:22,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-19 07:47:22,691 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-11-19 07:47:22,691 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 134 flow [2023-11-19 07:47:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 450.0) internal successors, (1350), 3 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:22,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:22,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:22,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:47:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:47:22,914 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:22,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1735934651, now seen corresponding path program 1 times [2023-11-19 07:47:22,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696578247] [2023-11-19 07:47:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:22,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:47:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696578247] [2023-11-19 07:47:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696578247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:22,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799382196] [2023-11-19 07:47:22,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:22,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:23,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 1068 [2023-11-19 07:47:23,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 450.3333333333333) internal successors, (1351), 3 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:23,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:23,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 1068 [2023-11-19 07:47:23,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:24,102 INFO L124 PetriNetUnfolderBase]: 3735/5343 cut-off events. [2023-11-19 07:47:24,102 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2023-11-19 07:47:24,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11878 conditions, 5343 events. 3735/5343 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 26283 event pairs, 3211 based on Foata normal form. 0/2515 useless extension candidates. Maximal degree in co-relation 11842. Up to 5343 conditions per place. [2023-11-19 07:47:24,142 INFO L140 encePairwiseOnDemand]: 1066/1068 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-19 07:47:24,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 218 flow [2023-11-19 07:47:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1381 transitions. [2023-11-19 07:47:24,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43102372034956304 [2023-11-19 07:47:24,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1381 transitions. [2023-11-19 07:47:24,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1381 transitions. [2023-11-19 07:47:24,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:24,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1381 transitions. [2023-11-19 07:47:24,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 460.3333333333333) internal successors, (1381), 3 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,166 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 134 flow. Second operand 3 states and 1381 transitions. [2023-11-19 07:47:24,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 218 flow [2023-11-19 07:47:24,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:47:24,172 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 122 flow [2023-11-19 07:47:24,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-11-19 07:47:24,173 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-11-19 07:47:24,174 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 122 flow [2023-11-19 07:47:24,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 450.3333333333333) internal successors, (1351), 3 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:24,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:24,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:47:24,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:24,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1735934614, now seen corresponding path program 1 times [2023-11-19 07:47:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237789011] [2023-11-19 07:47:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:24,276 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 07:47:24,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:24,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237789011] [2023-11-19 07:47:24,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237789011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:24,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847054501] [2023-11-19 07:47:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:24,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:24,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:24,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:47:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:24,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:24,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:24,463 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 07:47:24,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:24,488 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 07:47:24,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847054501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:24,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:24,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-11-19 07:47:24,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820488275] [2023-11-19 07:47:24,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:47:24,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:24,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:47:24,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:47:24,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 440 out of 1068 [2023-11-19 07:47:24,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 122 flow. Second operand has 8 states, 8 states have (on average 442.125) internal successors, (3537), 8 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:24,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:24,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 440 of 1068 [2023-11-19 07:47:24,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:25,820 INFO L124 PetriNetUnfolderBase]: 4713/6757 cut-off events. [2023-11-19 07:47:25,820 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2023-11-19 07:47:25,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14880 conditions, 6757 events. 4713/6757 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 36232 event pairs, 2333 based on Foata normal form. 2/3318 useless extension candidates. Maximal degree in co-relation 14871. Up to 3923 conditions per place. [2023-11-19 07:47:25,861 INFO L140 encePairwiseOnDemand]: 1059/1068 looper letters, 88 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2023-11-19 07:47:25,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 422 flow [2023-11-19 07:47:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:47:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:47:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 3179 transitions. [2023-11-19 07:47:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252273943285179 [2023-11-19 07:47:25,874 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 3179 transitions. [2023-11-19 07:47:25,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 3179 transitions. [2023-11-19 07:47:25,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:25,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 3179 transitions. [2023-11-19 07:47:25,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 454.14285714285717) internal successors, (3179), 7 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1068.0) internal successors, (8544), 8 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,898 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1068.0) internal successors, (8544), 8 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,898 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 122 flow. Second operand 7 states and 3179 transitions. [2023-11-19 07:47:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 422 flow [2023-11-19 07:47:25,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 421 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:25,901 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 143 flow [2023-11-19 07:47:25,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=143, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-11-19 07:47:25,902 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-11-19 07:47:25,902 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 143 flow [2023-11-19 07:47:25,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 442.125) internal successors, (3537), 8 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:25,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:25,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:25,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:26,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:47:26,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:26,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:26,118 INFO L85 PathProgramCache]: Analyzing trace with hash -370001971, now seen corresponding path program 1 times [2023-11-19 07:47:26,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:26,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261496656] [2023-11-19 07:47:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:26,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:26,201 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 07:47:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261496656] [2023-11-19 07:47:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261496656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:26,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:26,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:47:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792834040] [2023-11-19 07:47:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:26,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 1068 [2023-11-19 07:47:26,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 450.6666666666667) internal successors, (1352), 3 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:26,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:26,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 1068 [2023-11-19 07:47:26,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:27,464 INFO L124 PetriNetUnfolderBase]: 5921/8505 cut-off events. [2023-11-19 07:47:27,464 INFO L125 PetriNetUnfolderBase]: For 2935/2935 co-relation queries the response was YES. [2023-11-19 07:47:27,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20351 conditions, 8505 events. 5921/8505 cut-off events. For 2935/2935 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 46025 event pairs, 4089 based on Foata normal form. 0/4302 useless extension candidates. Maximal degree in co-relation 20340. Up to 6758 conditions per place. [2023-11-19 07:47:27,512 INFO L140 encePairwiseOnDemand]: 1061/1068 looper letters, 67 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-19 07:47:27,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 371 flow [2023-11-19 07:47:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1409 transitions. [2023-11-19 07:47:27,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43976279650436956 [2023-11-19 07:47:27,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1409 transitions. [2023-11-19 07:47:27,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1409 transitions. [2023-11-19 07:47:27,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:27,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1409 transitions. [2023-11-19 07:47:27,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:27,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:27,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:27,533 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 143 flow. Second operand 3 states and 1409 transitions. [2023-11-19 07:47:27,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 371 flow [2023-11-19 07:47:27,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 351 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-19 07:47:27,536 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 149 flow [2023-11-19 07:47:27,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-19 07:47:27,537 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2023-11-19 07:47:27,538 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 149 flow [2023-11-19 07:47:27,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 450.6666666666667) internal successors, (1352), 3 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:27,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:27,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-11-19 07:47:27,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:47:27,539 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:27,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash -370872238, now seen corresponding path program 2 times [2023-11-19 07:47:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:27,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958018816] [2023-11-19 07:47:27,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:27,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958018816] [2023-11-19 07:47:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958018816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709225103] [2023-11-19 07:47:27,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:27,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:27,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:27,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:47:27,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:47:27,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:27,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:47:27,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:47:27,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709225103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:27,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:27,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-19 07:47:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475991824] [2023-11-19 07:47:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:27,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:27,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 1068 [2023-11-19 07:47:27,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 452.3333333333333) internal successors, (1357), 3 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 07:47:27,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:27,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 1068 [2023-11-19 07:47:27,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:29,214 INFO L124 PetriNetUnfolderBase]: 4847/6977 cut-off events. [2023-11-19 07:47:29,215 INFO L125 PetriNetUnfolderBase]: For 2417/2417 co-relation queries the response was YES. [2023-11-19 07:47:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17939 conditions, 6977 events. 4847/6977 cut-off events. For 2417/2417 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 35679 event pairs, 4209 based on Foata normal form. 0/4120 useless extension candidates. Maximal degree in co-relation 17928. Up to 6977 conditions per place. [2023-11-19 07:47:29,264 INFO L140 encePairwiseOnDemand]: 1065/1068 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-19 07:47:29,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 225 flow [2023-11-19 07:47:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1386 transitions. [2023-11-19 07:47:29,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43258426966292135 [2023-11-19 07:47:29,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1386 transitions. [2023-11-19 07:47:29,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1386 transitions. [2023-11-19 07:47:29,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:29,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1386 transitions. [2023-11-19 07:47:29,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 462.0) internal successors, (1386), 3 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:29,307 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 149 flow. Second operand 3 states and 1386 transitions. [2023-11-19 07:47:29,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 225 flow [2023-11-19 07:47:29,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:29,310 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 141 flow [2023-11-19 07:47:29,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-11-19 07:47:29,312 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-11-19 07:47:29,312 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 141 flow [2023-11-19 07:47:29,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.3333333333333) internal successors, (1357), 3 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 07:47:29,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:29,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-11-19 07:47:29,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:29,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:47:29,535 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:29,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:29,536 INFO L85 PathProgramCache]: Analyzing trace with hash -370872220, now seen corresponding path program 1 times [2023-11-19 07:47:29,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:29,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099656028] [2023-11-19 07:47:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:29,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099656028] [2023-11-19 07:47:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099656028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224017807] [2023-11-19 07:47:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:29,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:29,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:29,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:29,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:47:29,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:47:29,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224017807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:29,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:29,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-19 07:47:29,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718980028] [2023-11-19 07:47:29,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:29,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:29,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:29,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 1068 [2023-11-19 07:47:29,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 452.3333333333333) internal successors, (1357), 3 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 07:47:29,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:29,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 1068 [2023-11-19 07:47:29,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:30,735 INFO L124 PetriNetUnfolderBase]: 4020/5802 cut-off events. [2023-11-19 07:47:30,735 INFO L125 PetriNetUnfolderBase]: For 1824/1824 co-relation queries the response was YES. [2023-11-19 07:47:30,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14551 conditions, 5802 events. 4020/5802 cut-off events. For 1824/1824 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 28674 event pairs, 3458 based on Foata normal form. 0/3625 useless extension candidates. Maximal degree in co-relation 14539. Up to 5802 conditions per place. [2023-11-19 07:47:30,763 INFO L140 encePairwiseOnDemand]: 1065/1068 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 07:47:30,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 211 flow [2023-11-19 07:47:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:47:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:47:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1384 transitions. [2023-11-19 07:47:30,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43196004993757803 [2023-11-19 07:47:30,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1384 transitions. [2023-11-19 07:47:30,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1384 transitions. [2023-11-19 07:47:30,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:30,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1384 transitions. [2023-11-19 07:47:30,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 461.3333333333333) internal successors, (1384), 3 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1068.0) internal successors, (4272), 4 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:30,784 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 141 flow. Second operand 3 states and 1384 transitions. [2023-11-19 07:47:30,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 211 flow [2023-11-19 07:47:30,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:30,787 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 132 flow [2023-11-19 07:47:30,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-19 07:47:30,788 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-11-19 07:47:30,788 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 132 flow [2023-11-19 07:47:30,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 452.3333333333333) internal successors, (1357), 3 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 07:47:30,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:30,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-11-19 07:47:30,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:47:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:47:31,005 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:31,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:31,006 INFO L85 PathProgramCache]: Analyzing trace with hash -370872221, now seen corresponding path program 1 times [2023-11-19 07:47:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173841116] [2023-11-19 07:47:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:31,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:31,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173841116] [2023-11-19 07:47:31,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173841116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:31,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034051611] [2023-11-19 07:47:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:31,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:31,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:31,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:31,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:31,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:47:31,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:31,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:47:31,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034051611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:31,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:47:31,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-19 07:47:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384826275] [2023-11-19 07:47:31,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:31,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:47:31,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:47:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:47:31,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 1068 [2023-11-19 07:47:31,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 132 flow. Second operand has 6 states, 6 states have (on average 449.6666666666667) internal successors, (2698), 6 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:31,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:31,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 1068 [2023-11-19 07:47:31,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:47:32,690 INFO L124 PetriNetUnfolderBase]: 5006/7234 cut-off events. [2023-11-19 07:47:32,690 INFO L125 PetriNetUnfolderBase]: For 1317/1317 co-relation queries the response was YES. [2023-11-19 07:47:32,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18068 conditions, 7234 events. 5006/7234 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39290 event pairs, 1694 based on Foata normal form. 0/4583 useless extension candidates. Maximal degree in co-relation 18055. Up to 2939 conditions per place. [2023-11-19 07:47:32,726 INFO L140 encePairwiseOnDemand]: 1064/1068 looper letters, 112 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2023-11-19 07:47:32,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 116 transitions, 577 flow [2023-11-19 07:47:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:47:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:47:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2349 transitions. [2023-11-19 07:47:32,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398876404494382 [2023-11-19 07:47:32,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2349 transitions. [2023-11-19 07:47:32,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2349 transitions. [2023-11-19 07:47:32,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:47:32,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2349 transitions. [2023-11-19 07:47:32,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 469.8) internal successors, (2349), 5 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1068.0) internal successors, (6408), 6 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1068.0) internal successors, (6408), 6 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,756 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 132 flow. Second operand 5 states and 2349 transitions. [2023-11-19 07:47:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 116 transitions, 577 flow [2023-11-19 07:47:32,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 116 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:47:32,766 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 153 flow [2023-11-19 07:47:32,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1068, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-11-19 07:47:32,767 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-11-19 07:47:32,767 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 153 flow [2023-11-19 07:47:32,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 449.6666666666667) internal successors, (2698), 6 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:47:32,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:47:32,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:47:32,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:47:32,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297250dc-faec-4f21-8ff3-3e3ce52ceac5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:32,985 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-19 07:47:32,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1387864219, now seen corresponding path program 2 times [2023-11-19 07:47:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:32,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742298927] [2023-11-19 07:47:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:47:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:47:33,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:33,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742298927] [2023-11-19 07:47:33,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742298927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:47:33,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:47:33,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:47:33,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937384776] [2023-11-19 07:47:33,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:47:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:47:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:47:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:47:33,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 450 out of 1068 [2023-11-19 07:47:33,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 452.3333333333333) internal successors, (1357), 3 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 07:47:33,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:47:33,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 450 of 1068 [2023-11-19 07:47:33,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand