./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/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_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/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_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:49:23,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:49:23,593 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:49:23,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:49:23,609 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:49:23,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:49:23,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:49:23,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:49:23,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:49:23,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:49:23,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:49:23,664 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:49:23,665 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:49:23,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:49:23,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:49:23,672 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:49:23,673 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:49:23,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:49:23,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:49:23,676 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:49:23,688 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:49:23,689 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:49:23,690 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:49:23,690 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:49:23,691 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:49:23,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:49:23,692 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:49:23,693 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:49:23,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:49:23,694 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:49:23,695 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:23,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:49:23,696 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:49:23,697 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:49:23,698 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:49:23,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:49:23,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:49:23,700 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:49:23,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:49:23,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:49:23,702 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:49:23,702 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_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2023-11-19 07:49:24,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:49:24,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:49:24,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:49:24,231 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:49:24,232 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:49:24,234 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-19 07:49:27,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:49:27,856 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:49:27,863 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-19 07:49:27,877 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/data/75d1b4602/8b894452496545708dcc73d83a1368ba/FLAG929679498 [2023-11-19 07:49:27,898 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/data/75d1b4602/8b894452496545708dcc73d83a1368ba [2023-11-19 07:49:27,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:49:27,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:49:27,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:27,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:49:27,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:49:27,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:27" (1/1) ... [2023-11-19 07:49:27,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713b7213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:27, skipping insertion in model container [2023-11-19 07:49:27,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:27" (1/1) ... [2023-11-19 07:49:27,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:49:28,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:28,231 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:49:28,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:28,278 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:49:28,278 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:49:28,289 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:49:28,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28 WrapperNode [2023-11-19 07:49:28,290 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:28,292 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:28,292 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:49:28,292 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:49:28,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,365 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 180 [2023-11-19 07:49:28,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:28,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:49:28,372 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:49:28,372 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:49:28,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,392 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,412 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:49:28,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:49:28,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:49:28,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:49:28,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (1/1) ... [2023-11-19 07:49:28,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:28,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:49:28,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:49:28,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:49:28,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:49:28,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:49:28,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:49:28,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:49:28,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:49:28,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:49:28,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:49:28,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:49:28,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:49:28,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:49:28,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:49:28,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:49:28,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:49:28,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:49:28,534 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 07:49:28,740 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:49:28,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:49:29,370 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:49:29,929 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:49:29,930 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:49:29,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:29 BoogieIcfgContainer [2023-11-19 07:49:29,939 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:49:29,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:49:29,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:49:29,949 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:49:29,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:27" (1/3) ... [2023-11-19 07:49:29,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c792c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:29, skipping insertion in model container [2023-11-19 07:49:29,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:28" (2/3) ... [2023-11-19 07:49:29,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c792c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:29, skipping insertion in model container [2023-11-19 07:49:29,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:29" (3/3) ... [2023-11-19 07:49:29,956 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-19 07:49:29,968 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:49:29,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:49:29,981 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-19 07:49:29,981 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:49:30,203 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:49:30,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 156 transitions, 326 flow [2023-11-19 07:49:30,394 INFO L124 PetriNetUnfolderBase]: 19/154 cut-off events. [2023-11-19 07:49:30,395 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:30,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 154 events. 19/154 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 202 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-11-19 07:49:30,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 156 transitions, 326 flow [2023-11-19 07:49:30,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 132 transitions, 273 flow [2023-11-19 07:49:30,419 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:30,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 132 transitions, 273 flow [2023-11-19 07:49:30,434 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 132 transitions, 273 flow [2023-11-19 07:49:30,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 132 transitions, 273 flow [2023-11-19 07:49:30,477 INFO L124 PetriNetUnfolderBase]: 18/132 cut-off events. [2023-11-19 07:49:30,478 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:49:30,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 132 events. 18/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 185 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-11-19 07:49:30,482 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-11-19 07:49:43,933 INFO L134 LiptonReduction]: Checked pairs total: 2528 [2023-11-19 07:49:43,933 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-19 07:49:43,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:43,961 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;@3f9755f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:43,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-19 07:49:43,964 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:43,964 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:49:43,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:43,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:43,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:49:43,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:43,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash 26639, now seen corresponding path program 1 times [2023-11-19 07:49:43,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:43,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550147629] [2023-11-19 07:49:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:43,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:44,296 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 07:49:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550147629] [2023-11-19 07:49:44,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550147629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:44,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:44,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746422450] [2023-11-19 07:49:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:44,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:44,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 303 [2023-11-19 07:49:44,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 07:49:44,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:44,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 303 [2023-11-19 07:49:44,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:44,606 INFO L124 PetriNetUnfolderBase]: 282/485 cut-off events. [2023-11-19 07:49:44,607 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-19 07:49:44,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 485 events. 282/485 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2082 event pairs, 240 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 900. Up to 485 conditions per place. [2023-11-19 07:49:44,613 INFO L140 encePairwiseOnDemand]: 294/303 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-11-19 07:49:44,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 133 flow [2023-11-19 07:49:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-11-19 07:49:44,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4235423542354235 [2023-11-19 07:49:44,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-11-19 07:49:44,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-11-19 07:49:44,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:44,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-11-19 07:49:44,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 07:49:44,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:44,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:44,655 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 75 flow. Second operand 3 states and 385 transitions. [2023-11-19 07:49:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 133 flow [2023-11-19 07:49:44,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:49:44,662 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 83 flow [2023-11-19 07:49:44,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-19 07:49:44,670 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-11-19 07:49:44,670 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 83 flow [2023-11-19 07:49:44,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 07:49:44,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:44,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:49:44,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:49:44,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:44,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 827028, now seen corresponding path program 1 times [2023-11-19 07:49:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:44,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912852070] [2023-11-19 07:49:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:44,883 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 07:49:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912852070] [2023-11-19 07:49:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912852070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636088676] [2023-11-19 07:49:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:44,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:44,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:44,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:49:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:45,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:49:45,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:45,102 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 07:49:45,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:45,124 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 07:49:45,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636088676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:45,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:45,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:49:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502963382] [2023-11-19 07:49:45,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:45,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:49:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:49:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:49:45,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 303 [2023-11-19 07:49:45,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 83 flow. Second operand has 7 states, 7 states have (on average 117.14285714285714) internal successors, (820), 7 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:49:45,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:45,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 303 [2023-11-19 07:49:45,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:45,397 INFO L124 PetriNetUnfolderBase]: 288/494 cut-off events. [2023-11-19 07:49:45,398 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-19 07:49:45,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 494 events. 288/494 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2090 event pairs, 240 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 975. Up to 487 conditions per place. [2023-11-19 07:49:45,406 INFO L140 encePairwiseOnDemand]: 298/303 looper letters, 27 selfloop transitions, 13 changer transitions 0/40 dead transitions. [2023-11-19 07:49:45,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 40 transitions, 199 flow [2023-11-19 07:49:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:49:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:49:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 855 transitions. [2023-11-19 07:49:45,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4031117397454031 [2023-11-19 07:49:45,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 855 transitions. [2023-11-19 07:49:45,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 855 transitions. [2023-11-19 07:49:45,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:45,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 855 transitions. [2023-11-19 07:49:45,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.14285714285714) internal successors, (855), 7 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 07:49:45,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:45,425 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:45,426 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 83 flow. Second operand 7 states and 855 transitions. [2023-11-19 07:49:45,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 40 transitions, 199 flow [2023-11-19 07:49:45,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 194 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:45,428 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 162 flow [2023-11-19 07:49:45,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-11-19 07:49:45,429 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-11-19 07:49:45,430 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 162 flow [2023-11-19 07:49:45,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.14285714285714) internal successors, (820), 7 states have internal predecessors, (820), 0 states have call successors, (0), 0 states 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 07:49:45,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:45,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-19 07:49:45,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:45,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:45,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:45,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash 25639088, now seen corresponding path program 1 times [2023-11-19 07:49:45,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:45,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985004573] [2023-11-19 07:49:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:45,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:45,760 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 07:49:45,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:45,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985004573] [2023-11-19 07:49:45,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985004573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:45,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:45,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:45,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385476277] [2023-11-19 07:49:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:45,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:45,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 303 [2023-11-19 07:49:45,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 07:49:45,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:45,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 303 [2023-11-19 07:49:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:45,951 INFO L124 PetriNetUnfolderBase]: 285/490 cut-off events. [2023-11-19 07:49:45,952 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:49:45,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 490 events. 285/490 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 2082 event pairs, 240 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 1001. Up to 484 conditions per place. [2023-11-19 07:49:45,957 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 30 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2023-11-19 07:49:45,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 207 flow [2023-11-19 07:49:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-11-19 07:49:45,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41474147414741475 [2023-11-19 07:49:45,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-11-19 07:49:45,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-11-19 07:49:45,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:45,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-11-19 07:49:45,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 07:49:45,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:45,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:45,966 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 162 flow. Second operand 3 states and 377 transitions. [2023-11-19 07:49:45,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 207 flow [2023-11-19 07:49:45,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 186 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:45,969 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 126 flow [2023-11-19 07:49:45,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-11-19 07:49:45,970 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-19 07:49:45,970 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 126 flow [2023-11-19 07:49:45,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 07:49:45,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:45,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:49:45,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:49:45,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:45,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash 794458813, now seen corresponding path program 1 times [2023-11-19 07:49:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:45,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724856470] [2023-11-19 07:49:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:45,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:46,055 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 07:49:46,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:46,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724856470] [2023-11-19 07:49:46,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724856470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:46,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:49:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607075711] [2023-11-19 07:49:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:46,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:46,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 303 [2023-11-19 07:49:46,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 07:49:46,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:46,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 303 [2023-11-19 07:49:46,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:46,265 INFO L124 PetriNetUnfolderBase]: 423/694 cut-off events. [2023-11-19 07:49:46,265 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-19 07:49:46,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1450 conditions, 694 events. 423/694 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3076 event pairs, 88 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 1416. Up to 541 conditions per place. [2023-11-19 07:49:46,272 INFO L140 encePairwiseOnDemand]: 292/303 looper letters, 48 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2023-11-19 07:49:46,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 277 flow [2023-11-19 07:49:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-11-19 07:49:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521452145214521 [2023-11-19 07:49:46,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-11-19 07:49:46,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-11-19 07:49:46,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:46,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-11-19 07:49:46,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 07:49:46,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:46,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:46,282 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 126 flow. Second operand 3 states and 411 transitions. [2023-11-19 07:49:46,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 277 flow [2023-11-19 07:49:46,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:46,285 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 167 flow [2023-11-19 07:49:46,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-11-19 07:49:46,286 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-11-19 07:49:46,287 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 167 flow [2023-11-19 07:49:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 07:49:46,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:46,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:49:46,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:49:46,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:46,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash 794458788, now seen corresponding path program 1 times [2023-11-19 07:49:46,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:46,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469237768] [2023-11-19 07:49:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:46,416 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 07:49:46,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:46,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469237768] [2023-11-19 07:49:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469237768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:46,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:46,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892240188] [2023-11-19 07:49:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:46,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:46,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:46,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:46,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 303 [2023-11-19 07:49:46,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 167 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 07:49:46,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:46,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 303 [2023-11-19 07:49:46,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:46,837 INFO L124 PetriNetUnfolderBase]: 543/917 cut-off events. [2023-11-19 07:49:46,837 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-19 07:49:46,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 917 events. 543/917 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4381 event pairs, 353 based on Foata normal form. 26/542 useless extension candidates. Maximal degree in co-relation 2274. Up to 693 conditions per place. [2023-11-19 07:49:46,847 INFO L140 encePairwiseOnDemand]: 290/303 looper letters, 66 selfloop transitions, 5 changer transitions 2/73 dead transitions. [2023-11-19 07:49:46,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 409 flow [2023-11-19 07:49:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:49:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:49:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 611 transitions. [2023-11-19 07:49:46,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033003300330033 [2023-11-19 07:49:46,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 611 transitions. [2023-11-19 07:49:46,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 611 transitions. [2023-11-19 07:49:46,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:46,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 611 transitions. [2023-11-19 07:49:46,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states 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 07:49:46,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 07:49:46,858 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 07:49:46,859 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 167 flow. Second operand 5 states and 611 transitions. [2023-11-19 07:49:46,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 409 flow [2023-11-19 07:49:46,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 73 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:46,863 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 211 flow [2023-11-19 07:49:46,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2023-11-19 07:49:46,864 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-11-19 07:49:46,864 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 211 flow [2023-11-19 07:49:46,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 07:49:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:46,865 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:49:46,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:49:46,865 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:46,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1130602161, now seen corresponding path program 2 times [2023-11-19 07:49:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:46,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389293040] [2023-11-19 07:49:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:46,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389293040] [2023-11-19 07:49:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389293040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341121760] [2023-11-19 07:49:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:49:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:46,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:47,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:49:47,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:49:47,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:47,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:49:47,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:47,117 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 07:49:47,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:47,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341121760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:47,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:47,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:49:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659963662] [2023-11-19 07:49:47,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:47,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:47,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 303 [2023-11-19 07:49:47,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states 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 07:49:47,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:47,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 303 [2023-11-19 07:49:47,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:47,379 INFO L124 PetriNetUnfolderBase]: 543/916 cut-off events. [2023-11-19 07:49:47,379 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-11-19 07:49:47,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2646 conditions, 916 events. 543/916 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4292 event pairs, 389 based on Foata normal form. 1/548 useless extension candidates. Maximal degree in co-relation 2617. Up to 911 conditions per place. [2023-11-19 07:49:47,390 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 37 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-11-19 07:49:47,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 287 flow [2023-11-19 07:49:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-11-19 07:49:47,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42024202420242024 [2023-11-19 07:49:47,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-11-19 07:49:47,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-11-19 07:49:47,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:47,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-11-19 07:49:47,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 07:49:47,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:47,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:47,398 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 211 flow. Second operand 3 states and 382 transitions. [2023-11-19 07:49:47,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 287 flow [2023-11-19 07:49:47,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 266 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-19 07:49:47,401 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 192 flow [2023-11-19 07:49:47,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-11-19 07:49:47,403 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-11-19 07:49:47,403 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 192 flow [2023-11-19 07:49:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states 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 07:49:47,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:47,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:47,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:47,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:49:47,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:47,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1130956289, now seen corresponding path program 1 times [2023-11-19 07:49:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:47,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376764583] [2023-11-19 07:49:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:48,048 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 07:49:48,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376764583] [2023-11-19 07:49:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376764583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914094523] [2023-11-19 07:49:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:48,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:48,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:48,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:49:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:48,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:49:48,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:48,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:49:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:48,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:49:48,363 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 07:49:48,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:48,423 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_110 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_110) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 9223372039002259456))) is different from false [2023-11-19 07:49:48,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:48,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-11-19 07:49:48,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:48,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-11-19 07:49:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 07:49:48,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914094523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:48,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:48,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-19 07:49:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472720180] [2023-11-19 07:49:48,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:48,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:49:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:49:48,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-19 07:49:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 303 [2023-11-19 07:49:48,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 192 flow. Second operand has 14 states, 14 states have (on average 92.28571428571429) internal successors, (1292), 14 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 07:49:48,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:48,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 303 [2023-11-19 07:49:48,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:49,247 INFO L124 PetriNetUnfolderBase]: 594/1072 cut-off events. [2023-11-19 07:49:49,247 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-11-19 07:49:49,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3035 conditions, 1072 events. 594/1072 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 5856 event pairs, 251 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 2386. Up to 762 conditions per place. [2023-11-19 07:49:49,258 INFO L140 encePairwiseOnDemand]: 290/303 looper letters, 48 selfloop transitions, 25 changer transitions 0/73 dead transitions. [2023-11-19 07:49:49,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 461 flow [2023-11-19 07:49:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 787 transitions. [2023-11-19 07:49:49,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32466996699669964 [2023-11-19 07:49:49,264 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 787 transitions. [2023-11-19 07:49:49,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 787 transitions. [2023-11-19 07:49:49,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:49,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 787 transitions. [2023-11-19 07:49:49,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.375) internal successors, (787), 8 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 07:49:49,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 303.0) internal successors, (2727), 9 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states 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 07:49:49,275 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 303.0) internal successors, (2727), 9 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states 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 07:49:49,276 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 192 flow. Second operand 8 states and 787 transitions. [2023-11-19 07:49:49,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 461 flow [2023-11-19 07:49:49,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:49,282 INFO L231 Difference]: Finished difference. Result has 48 places, 55 transitions, 311 flow [2023-11-19 07:49:49,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=311, PETRI_PLACES=48, PETRI_TRANSITIONS=55} [2023-11-19 07:49:49,283 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-11-19 07:49:49,284 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 311 flow [2023-11-19 07:49:49,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.28571428571429) internal successors, (1292), 14 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 07:49:49,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:49,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:49:49,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:49:49,506 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:49,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1130956268, now seen corresponding path program 1 times [2023-11-19 07:49:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996991838] [2023-11-19 07:49:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:49,775 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 07:49:49,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996991838] [2023-11-19 07:49:49,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996991838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:49,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574850431] [2023-11-19 07:49:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:49,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:49,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:49,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:49,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:49:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:49,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:49:49,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:49,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:49:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:49,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:49:49,992 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 07:49:49,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:50,030 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_132 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296)) is different from false [2023-11-19 07:49:50,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:50,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-19 07:49:50,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:50,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-19 07:49:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 07:49:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574850431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:50,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:50,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-19 07:49:50,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812956333] [2023-11-19 07:49:50,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:50,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:49:50,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:49:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-19 07:49:50,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 303 [2023-11-19 07:49:50,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 55 transitions, 311 flow. Second operand has 14 states, 14 states have (on average 92.28571428571429) internal successors, (1292), 14 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 07:49:50,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:50,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 303 [2023-11-19 07:49:50,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:50,725 INFO L124 PetriNetUnfolderBase]: 593/1078 cut-off events. [2023-11-19 07:49:50,725 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2023-11-19 07:49:50,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 1078 events. 593/1078 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6037 event pairs, 281 based on Foata normal form. 1/717 useless extension candidates. Maximal degree in co-relation 2662. Up to 769 conditions per place. [2023-11-19 07:49:50,735 INFO L140 encePairwiseOnDemand]: 290/303 looper letters, 47 selfloop transitions, 27 changer transitions 0/74 dead transitions. [2023-11-19 07:49:50,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 537 flow [2023-11-19 07:49:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:49:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:49:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2023-11-19 07:49:50,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3234323432343234 [2023-11-19 07:49:50,739 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2023-11-19 07:49:50,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2023-11-19 07:49:50,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:50,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2023-11-19 07:49:50,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states 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 07:49:50,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 303.0) internal successors, (2727), 9 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states 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 07:49:50,749 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 303.0) internal successors, (2727), 9 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states 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 07:49:50,749 INFO L175 Difference]: Start difference. First operand has 48 places, 55 transitions, 311 flow. Second operand 8 states and 784 transitions. [2023-11-19 07:49:50,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 537 flow [2023-11-19 07:49:50,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 526 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:50,754 INFO L231 Difference]: Finished difference. Result has 54 places, 57 transitions, 363 flow [2023-11-19 07:49:50,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=54, PETRI_TRANSITIONS=57} [2023-11-19 07:49:50,755 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2023-11-19 07:49:50,755 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 57 transitions, 363 flow [2023-11-19 07:49:50,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 92.28571428571429) internal successors, (1292), 14 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 07:49:50,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:50,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:50,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:50,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:49:50,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:50,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash -222161291, now seen corresponding path program 1 times [2023-11-19 07:49:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:50,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599316001] [2023-11-19 07:49:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:50,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:51,072 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 07:49:51,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:51,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599316001] [2023-11-19 07:49:51,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599316001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:51,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:51,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247319650] [2023-11-19 07:49:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:51,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:51,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:51,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:51,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:51,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 303 [2023-11-19 07:49:51,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 363 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 07:49:51,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:51,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 303 [2023-11-19 07:49:51,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:51,359 INFO L124 PetriNetUnfolderBase]: 544/990 cut-off events. [2023-11-19 07:49:51,359 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2023-11-19 07:49:51,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 990 events. 544/990 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5547 event pairs, 173 based on Foata normal form. 0/710 useless extension candidates. Maximal degree in co-relation 2470. Up to 634 conditions per place. [2023-11-19 07:49:51,368 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 64 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2023-11-19 07:49:51,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 537 flow [2023-11-19 07:49:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-11-19 07:49:51,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43234323432343236 [2023-11-19 07:49:51,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-11-19 07:49:51,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-11-19 07:49:51,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:51,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-11-19 07:49:51,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states 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 07:49:51,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:51,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:51,376 INFO L175 Difference]: Start difference. First operand has 54 places, 57 transitions, 363 flow. Second operand 3 states and 393 transitions. [2023-11-19 07:49:51,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 537 flow [2023-11-19 07:49:51,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 525 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:49:51,381 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 332 flow [2023-11-19 07:49:51,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=332, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-11-19 07:49:51,382 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2023-11-19 07:49:51,383 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 332 flow [2023-11-19 07:49:51,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 07:49:51,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:51,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:51,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:49:51,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:51,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash -699796794, now seen corresponding path program 1 times [2023-11-19 07:49:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:51,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541175149] [2023-11-19 07:49:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:51,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:51,707 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 07:49:51,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541175149] [2023-11-19 07:49:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541175149] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452188722] [2023-11-19 07:49:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:51,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:51,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:51,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:51,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:49:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:51,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:49:51,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:51,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:49:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:51,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:49:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:51,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:49:52,002 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 07:49:52,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:52,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:52,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-11-19 07:49:52,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:52,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 135 [2023-11-19 07:49:52,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-19 07:49:52,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-19 07:49:52,257 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 07:49:52,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452188722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:52,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:52,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:49:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997687697] [2023-11-19 07:49:52,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:52,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:49:52,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:49:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=211, Unknown=8, NotChecked=0, Total=272 [2023-11-19 07:49:52,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 303 [2023-11-19 07:49:52,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 332 flow. Second operand has 17 states, 17 states have (on average 89.23529411764706) internal successors, (1517), 17 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 07:49:52,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:52,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 303 [2023-11-19 07:49:52,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:53,720 INFO L124 PetriNetUnfolderBase]: 625/1124 cut-off events. [2023-11-19 07:49:53,720 INFO L125 PetriNetUnfolderBase]: For 1440/1440 co-relation queries the response was YES. [2023-11-19 07:49:53,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3717 conditions, 1124 events. 625/1124 cut-off events. For 1440/1440 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 6419 event pairs, 230 based on Foata normal form. 38/832 useless extension candidates. Maximal degree in co-relation 3004. Up to 399 conditions per place. [2023-11-19 07:49:53,731 INFO L140 encePairwiseOnDemand]: 292/303 looper letters, 75 selfloop transitions, 22 changer transitions 1/98 dead transitions. [2023-11-19 07:49:53,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 98 transitions, 696 flow [2023-11-19 07:49:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:49:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:49:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 691 transitions. [2023-11-19 07:49:53,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3257897218293258 [2023-11-19 07:49:53,735 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 691 transitions. [2023-11-19 07:49:53,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 691 transitions. [2023-11-19 07:49:53,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:53,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 691 transitions. [2023-11-19 07:49:53,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 07:49:53,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:53,744 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:53,744 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 332 flow. Second operand 7 states and 691 transitions. [2023-11-19 07:49:53,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 98 transitions, 696 flow [2023-11-19 07:49:53,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 682 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:53,751 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 430 flow [2023-11-19 07:49:53,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-11-19 07:49:53,752 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-11-19 07:49:53,752 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 430 flow [2023-11-19 07:49:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 89.23529411764706) internal successors, (1517), 17 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 07:49:53,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:53,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:53,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:53,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:49:53,970 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:53,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash -699796773, now seen corresponding path program 1 times [2023-11-19 07:49:53,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:53,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128368348] [2023-11-19 07:49:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:54,386 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 07:49:54,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:54,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128368348] [2023-11-19 07:49:54,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128368348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:54,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764162686] [2023-11-19 07:49:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:54,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:54,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:54,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:54,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:49:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:54,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:49:54,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:54,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:49:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:54,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:49:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:49:54,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:49:54,667 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 07:49:54,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:54,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:54,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-11-19 07:49:54,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:54,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2023-11-19 07:49:54,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-19 07:49:54,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-19 07:49:54,871 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 07:49:54,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764162686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:54,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:54,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:49:54,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212856593] [2023-11-19 07:49:54,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:49:54,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:49:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=210, Unknown=9, NotChecked=0, Total=272 [2023-11-19 07:49:55,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 303 [2023-11-19 07:49:55,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 430 flow. Second operand has 17 states, 17 states have (on average 89.23529411764706) internal successors, (1517), 17 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 07:49:55,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:55,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 303 [2023-11-19 07:49:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:55,884 INFO L124 PetriNetUnfolderBase]: 581/1053 cut-off events. [2023-11-19 07:49:55,884 INFO L125 PetriNetUnfolderBase]: For 1515/1515 co-relation queries the response was YES. [2023-11-19 07:49:55,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3795 conditions, 1053 events. 581/1053 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 5941 event pairs, 230 based on Foata normal form. 27/766 useless extension candidates. Maximal degree in co-relation 3125. Up to 383 conditions per place. [2023-11-19 07:49:55,894 INFO L140 encePairwiseOnDemand]: 292/303 looper letters, 74 selfloop transitions, 22 changer transitions 1/97 dead transitions. [2023-11-19 07:49:55,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 97 transitions, 754 flow [2023-11-19 07:49:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:49:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:49:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-11-19 07:49:55,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32484677039132487 [2023-11-19 07:49:55,898 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-11-19 07:49:55,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-11-19 07:49:55,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:55,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-11-19 07:49:55,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 07:49:55,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:55,907 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:55,907 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 430 flow. Second operand 7 states and 689 transitions. [2023-11-19 07:49:55,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 97 transitions, 754 flow [2023-11-19 07:49:55,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 744 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:49:55,915 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 456 flow [2023-11-19 07:49:55,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2023-11-19 07:49:55,916 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2023-11-19 07:49:55,917 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 456 flow [2023-11-19 07:49:55,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 89.23529411764706) internal successors, (1517), 17 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 07:49:55,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:55,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:55,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:56,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:56,132 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:56,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -699903221, now seen corresponding path program 1 times [2023-11-19 07:49:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:56,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110449662] [2023-11-19 07:49:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:56,292 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 07:49:56,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:56,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110449662] [2023-11-19 07:49:56,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110449662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:56,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:56,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:56,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91433930] [2023-11-19 07:49:56,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:56,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 303 [2023-11-19 07:49:56,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:56,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 303 [2023-11-19 07:49:56,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:56,476 INFO L124 PetriNetUnfolderBase]: 475/856 cut-off events. [2023-11-19 07:49:56,476 INFO L125 PetriNetUnfolderBase]: For 2351/2351 co-relation queries the response was YES. [2023-11-19 07:49:56,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 856 events. 475/856 cut-off events. For 2351/2351 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 4393 event pairs, 320 based on Foata normal form. 0/646 useless extension candidates. Maximal degree in co-relation 2534. Up to 856 conditions per place. [2023-11-19 07:49:56,484 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-19 07:49:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 515 flow [2023-11-19 07:49:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-11-19 07:49:56,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42464246424642466 [2023-11-19 07:49:56,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-11-19 07:49:56,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-11-19 07:49:56,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:56,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-11-19 07:49:56,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 07:49:56,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:56,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:56,491 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 456 flow. Second operand 3 states and 386 transitions. [2023-11-19 07:49:56,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 515 flow [2023-11-19 07:49:56,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 498 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:49:56,497 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 394 flow [2023-11-19 07:49:56,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-19 07:49:56,500 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 20 predicate places. [2023-11-19 07:49:56,500 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 394 flow [2023-11-19 07:49:56,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:56,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:56,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:49:56,501 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:56,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:56,502 INFO L85 PathProgramCache]: Analyzing trace with hash -699903177, now seen corresponding path program 1 times [2023-11-19 07:49:56,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:56,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304852013] [2023-11-19 07:49:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:56,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:56,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304852013] [2023-11-19 07:49:56,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304852013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:56,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167196724] [2023-11-19 07:49:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:56,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:56,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:49:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:56,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:49:56,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:49:56,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:56,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167196724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:56,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:56,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:49:56,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138554846] [2023-11-19 07:49:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:56,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 303 [2023-11-19 07:49:56,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 07:49:56,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:56,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 303 [2023-11-19 07:49:56,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:56,964 INFO L124 PetriNetUnfolderBase]: 402/724 cut-off events. [2023-11-19 07:49:56,964 INFO L125 PetriNetUnfolderBase]: For 1999/1999 co-relation queries the response was YES. [2023-11-19 07:49:56,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2531 conditions, 724 events. 402/724 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3512 event pairs, 269 based on Foata normal form. 32/580 useless extension candidates. Maximal degree in co-relation 2513. Up to 724 conditions per place. [2023-11-19 07:49:56,971 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 48 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-19 07:49:56,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 445 flow [2023-11-19 07:49:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-11-19 07:49:56,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41914191419141916 [2023-11-19 07:49:56,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-11-19 07:49:56,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-11-19 07:49:56,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:56,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-11-19 07:49:56,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 07:49:56,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:56,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:56,978 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 394 flow. Second operand 3 states and 381 transitions. [2023-11-19 07:49:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 445 flow [2023-11-19 07:49:56,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 439 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:56,986 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 343 flow [2023-11-19 07:49:56,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-19 07:49:56,987 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-11-19 07:49:56,987 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 343 flow [2023-11-19 07:49:56,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 07:49:56,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:56,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:57,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:49:57,208 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:57,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash -699903223, now seen corresponding path program 1 times [2023-11-19 07:49:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281096396] [2023-11-19 07:49:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:57,283 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 07:49:57,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281096396] [2023-11-19 07:49:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281096396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:49:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017070049] [2023-11-19 07:49:57,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:57,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:57,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:57,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 303 [2023-11-19 07:49:57,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:57,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:57,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 303 [2023-11-19 07:49:57,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:57,407 INFO L124 PetriNetUnfolderBase]: 321/574 cut-off events. [2023-11-19 07:49:57,407 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-11-19 07:49:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 574 events. 321/574 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2532 event pairs, 204 based on Foata normal form. 24/472 useless extension candidates. Maximal degree in co-relation 1881. Up to 574 conditions per place. [2023-11-19 07:49:57,413 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-19 07:49:57,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 378 flow [2023-11-19 07:49:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-11-19 07:49:57,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42024202420242024 [2023-11-19 07:49:57,416 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-11-19 07:49:57,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-11-19 07:49:57,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:57,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-11-19 07:49:57,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 07:49:57,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 07:49:57,421 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 343 flow. Second operand 3 states and 382 transitions. [2023-11-19 07:49:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 378 flow [2023-11-19 07:49:57,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 354 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:57,426 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 268 flow [2023-11-19 07:49:57,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=268, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2023-11-19 07:49:57,427 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-11-19 07:49:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 268 flow [2023-11-19 07:49:57,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:57,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:57,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:57,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:49:57,428 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:57,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1737704323, now seen corresponding path program 1 times [2023-11-19 07:49:57,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:57,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618106526] [2023-11-19 07:49:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:57,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:57,480 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 07:49:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:57,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618106526] [2023-11-19 07:49:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618106526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:57,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570266879] [2023-11-19 07:49:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:57,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:57,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:57,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:49:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:57,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:49:57,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:57,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:57,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570266879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:57,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:57,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2023-11-19 07:49:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367560805] [2023-11-19 07:49:57,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:57,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:49:57,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 303 [2023-11-19 07:49:57,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 07:49:57,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:57,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 303 [2023-11-19 07:49:57,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:57,999 INFO L124 PetriNetUnfolderBase]: 242/439 cut-off events. [2023-11-19 07:49:57,999 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2023-11-19 07:49:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 439 events. 242/439 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1812 event pairs, 132 based on Foata normal form. 8/369 useless extension candidates. Maximal degree in co-relation 1438. Up to 384 conditions per place. [2023-11-19 07:49:58,007 INFO L140 encePairwiseOnDemand]: 294/303 looper letters, 38 selfloop transitions, 2 changer transitions 16/56 dead transitions. [2023-11-19 07:49:58,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 415 flow [2023-11-19 07:49:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:49:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:49:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-11-19 07:49:58,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38679867986798677 [2023-11-19 07:49:58,011 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-11-19 07:49:58,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-11-19 07:49:58,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:58,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-11-19 07:49:58,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 07:49:58,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 07:49:58,018 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 303.0) internal successors, (1818), 6 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 07:49:58,018 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 268 flow. Second operand 5 states and 586 transitions. [2023-11-19 07:49:58,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 415 flow [2023-11-19 07:49:58,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:49:58,022 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 262 flow [2023-11-19 07:49:58,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-11-19 07:49:58,024 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-11-19 07:49:58,024 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 262 flow [2023-11-19 07:49:58,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 07:49:58,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:58,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:58,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:49:58,247 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:58,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash -699903248, now seen corresponding path program 1 times [2023-11-19 07:49:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686349375] [2023-11-19 07:49:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686349375] [2023-11-19 07:49:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686349375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369903740] [2023-11-19 07:49:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:58,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:58,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:49:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:58,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:49:58,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:58,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-11-19 07:49:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:58,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:58,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 94 [2023-11-19 07:49:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:58,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369903740] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:49:58,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:49:58,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-19 07:49:58,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937601660] [2023-11-19 07:49:58,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:49:58,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:49:58,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:49:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:49:59,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 303 [2023-11-19 07:49:59,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 262 flow. Second operand has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states 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 07:49:59,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:59,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 303 [2023-11-19 07:49:59,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:59,529 INFO L124 PetriNetUnfolderBase]: 365/638 cut-off events. [2023-11-19 07:49:59,529 INFO L125 PetriNetUnfolderBase]: For 1242/1242 co-relation queries the response was YES. [2023-11-19 07:49:59,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2339 conditions, 638 events. 365/638 cut-off events. For 1242/1242 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2854 event pairs, 153 based on Foata normal form. 42/548 useless extension candidates. Maximal degree in co-relation 2318. Up to 382 conditions per place. [2023-11-19 07:49:59,536 INFO L140 encePairwiseOnDemand]: 295/303 looper letters, 67 selfloop transitions, 12 changer transitions 3/82 dead transitions. [2023-11-19 07:49:59,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 82 transitions, 639 flow [2023-11-19 07:49:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:49:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:49:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 802 transitions. [2023-11-19 07:49:59,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781235266383781 [2023-11-19 07:49:59,545 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 802 transitions. [2023-11-19 07:49:59,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 802 transitions. [2023-11-19 07:49:59,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:59,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 802 transitions. [2023-11-19 07:49:59,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 114.57142857142857) internal successors, (802), 7 states have internal predecessors, (802), 0 states have call successors, (0), 0 states 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 07:49:59,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:59,556 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:49:59,556 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 262 flow. Second operand 7 states and 802 transitions. [2023-11-19 07:49:59,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 82 transitions, 639 flow [2023-11-19 07:49:59,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 577 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-11-19 07:49:59,564 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 370 flow [2023-11-19 07:49:59,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2023-11-19 07:49:59,564 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2023-11-19 07:49:59,565 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 370 flow [2023-11-19 07:49:59,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.28571428571429) internal successors, (1502), 14 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states 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 07:49:59,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:59,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:59,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:59,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:59,787 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:49:59,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash -218870811, now seen corresponding path program 1 times [2023-11-19 07:49:59,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:59,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510638096] [2023-11-19 07:49:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:00,057 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 07:50:00,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:00,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510638096] [2023-11-19 07:50:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510638096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:00,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010027116] [2023-11-19 07:50:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:00,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:00,059 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:00,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:50:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:00,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:50:00,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:00,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:50:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:00,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:50:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:00,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:50:00,343 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 07:50:00,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:00,393 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~A~0.base) c_~A~0.offset) 4294967296))) is different from false [2023-11-19 07:50:00,406 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_306 (Array Int Int)) (v_ArrVal_307 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_306) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296))) is different from false [2023-11-19 07:50:00,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:00,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2023-11-19 07:50:00,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:00,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2023-11-19 07:50:00,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2023-11-19 07:50:00,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-19 07:50:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-19 07:50:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010027116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:00,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:00,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:50:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276930781] [2023-11-19 07:50:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:50:00,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:50:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=167, Unknown=2, NotChecked=54, Total=272 [2023-11-19 07:50:00,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 303 [2023-11-19 07:50:00,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 370 flow. Second operand has 17 states, 17 states have (on average 89.41176470588235) internal successors, (1520), 17 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states 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 07:50:00,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:00,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 303 [2023-11-19 07:50:00,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:01,007 INFO L124 PetriNetUnfolderBase]: 391/688 cut-off events. [2023-11-19 07:50:01,008 INFO L125 PetriNetUnfolderBase]: For 1942/1942 co-relation queries the response was YES. [2023-11-19 07:50:01,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 688 events. 391/688 cut-off events. For 1942/1942 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3212 event pairs, 102 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 2450. Up to 390 conditions per place. [2023-11-19 07:50:01,014 INFO L140 encePairwiseOnDemand]: 294/303 looper letters, 66 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2023-11-19 07:50:01,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 764 flow [2023-11-19 07:50:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:50:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 658 transitions. [2023-11-19 07:50:01,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3102310231023102 [2023-11-19 07:50:01,018 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 658 transitions. [2023-11-19 07:50:01,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 658 transitions. [2023-11-19 07:50:01,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:01,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 658 transitions. [2023-11-19 07:50:01,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.0) internal successors, (658), 7 states have internal predecessors, (658), 0 states have call successors, (0), 0 states 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 07:50:01,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:50:01,027 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:50:01,027 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 370 flow. Second operand 7 states and 658 transitions. [2023-11-19 07:50:01,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 764 flow [2023-11-19 07:50:01,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 745 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-19 07:50:01,033 INFO L231 Difference]: Finished difference. Result has 63 places, 50 transitions, 409 flow [2023-11-19 07:50:01,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=63, PETRI_TRANSITIONS=50} [2023-11-19 07:50:01,034 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 26 predicate places. [2023-11-19 07:50:01,034 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 409 flow [2023-11-19 07:50:01,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 89.41176470588235) internal successors, (1520), 17 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states 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 07:50:01,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:01,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:01,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:01,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:50:01,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:50:01,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:01,256 INFO L85 PathProgramCache]: Analyzing trace with hash -218870872, now seen corresponding path program 1 times [2023-11-19 07:50:01,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:01,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484236136] [2023-11-19 07:50:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:01,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:01,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484236136] [2023-11-19 07:50:01,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484236136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:01,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621768658] [2023-11-19 07:50:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:01,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:01,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:50:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:01,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:50:01,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:01,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:50:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:01,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:50:01,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:01,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:50:01,879 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 07:50:01,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:02,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:02,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-11-19 07:50:02,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:02,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2023-11-19 07:50:02,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-19 07:50:02,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-19 07:50:02,080 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 07:50:02,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621768658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:02,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:02,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:50:02,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356649689] [2023-11-19 07:50:02,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:02,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:50:02,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:50:02,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=209, Unknown=10, NotChecked=0, Total=272 [2023-11-19 07:50:02,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 303 [2023-11-19 07:50:02,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 409 flow. Second operand has 17 states, 17 states have (on average 89.41176470588235) internal successors, (1520), 17 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states 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 07:50:02,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:02,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 303 [2023-11-19 07:50:02,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:02,747 INFO L124 PetriNetUnfolderBase]: 347/608 cut-off events. [2023-11-19 07:50:02,747 INFO L125 PetriNetUnfolderBase]: For 1795/1795 co-relation queries the response was YES. [2023-11-19 07:50:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2602 conditions, 608 events. 347/608 cut-off events. For 1795/1795 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2670 event pairs, 102 based on Foata normal form. 36/616 useless extension candidates. Maximal degree in co-relation 2579. Up to 390 conditions per place. [2023-11-19 07:50:02,753 INFO L140 encePairwiseOnDemand]: 294/303 looper letters, 65 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-11-19 07:50:02,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 785 flow [2023-11-19 07:50:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:50:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 656 transitions. [2023-11-19 07:50:02,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30928807166430927 [2023-11-19 07:50:02,757 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 656 transitions. [2023-11-19 07:50:02,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 656 transitions. [2023-11-19 07:50:02,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:02,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 656 transitions. [2023-11-19 07:50:02,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 07:50:02,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:50:02,765 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 303.0) internal successors, (2424), 8 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states 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 07:50:02,765 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 409 flow. Second operand 7 states and 656 transitions. [2023-11-19 07:50:02,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 785 flow [2023-11-19 07:50:02,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 763 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-19 07:50:02,805 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 407 flow [2023-11-19 07:50:02,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=407, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-11-19 07:50:02,806 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 28 predicate places. [2023-11-19 07:50:02,806 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 407 flow [2023-11-19 07:50:02,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 89.41176470588235) internal successors, (1520), 17 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states 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 07:50:02,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:02,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:02,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:03,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:50:03,020 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-19 07:50:03,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 107112331, now seen corresponding path program 2 times [2023-11-19 07:50:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588679509] [2023-11-19 07:50:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:03,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:03,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588679509] [2023-11-19 07:50:03,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588679509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:50:03,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435662349] [2023-11-19 07:50:03,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:03,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:03,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:03,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:03,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c71f7a-1090-4c50-bbf2-a58aa1ad68d1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:50:03,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:03,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:50:03,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:03,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-19 07:50:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:03,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-19 07:50:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:03,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:04,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:04,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 126 [2023-11-19 07:50:04,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:04,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 227 treesize of output 241 [2023-11-19 07:50:04,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:04,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 144 [2023-11-19 07:50:04,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:50:04,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 125 [2023-11-19 07:50:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:07,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435662349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:07,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:50:07,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-19 07:50:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065283372] [2023-11-19 07:50:07,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:07,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:50:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:50:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:50:09,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 303 [2023-11-19 07:50:09,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 407 flow. Second operand has 20 states, 20 states have (on average 98.2) internal successors, (1964), 20 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states 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 07:50:09,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:09,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 303 [2023-11-19 07:50:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand