./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme --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 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:03:51,185 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:51,315 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 12:03:51,320 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:51,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:51,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:51,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:51,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:51,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:51,387 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:51,387 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:51,388 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:51,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:51,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:51,391 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:51,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:51,392 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:03:51,393 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:03:51,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:51,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:03:51,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:51,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:03:51,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:51,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:03:51,396 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 12:03:51,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:03:51,397 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:03:51,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:03:51,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:51,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:51,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:51,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:51,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:51,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:51,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:51,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:51,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:03:51,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:51,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:51,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:51,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:51,403 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:03:51,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:51,404 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:51,404 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_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ead2366baa94ec77674f75cd829f45857f5651e204e91d33a749a2af2868461 [2023-11-26 12:03:51,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:51,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:51,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:51,793 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:51,794 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:51,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-26 12:03:55,007 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:55,281 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:55,282 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-26 12:03:55,292 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/data/6dd604eaf/d0ab00edca6445eeaaee29c515610c63/FLAG210f91ede [2023-11-26 12:03:55,319 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/data/6dd604eaf/d0ab00edca6445eeaaee29c515610c63 [2023-11-26 12:03:55,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:55,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:55,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:55,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:55,336 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:55,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2401d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55, skipping insertion in model container [2023-11-26 12:03:55,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:55,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:55,635 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:55,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:55,687 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:55,688 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:55,695 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:55,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55 WrapperNode [2023-11-26 12:03:55,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:55,698 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:55,698 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:55,698 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:55,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,764 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 62 [2023-11-26 12:03:55,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:55,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:55,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:55,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:55,777 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,783 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,810 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-26 12:03:55,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:55,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:55,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:55,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:55,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (1/1) ... [2023-11-26 12:03:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:55,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:55,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:55,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:03:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:03:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:03:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:03:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:03:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:03:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:03:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:03:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:03:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:03:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:03:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:03:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:55,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:03:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:03:55,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:03:55,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:03:55,919 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:03:56,036 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:56,039 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:56,356 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:56,653 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:56,654 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 12:03:56,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:56 BoogieIcfgContainer [2023-11-26 12:03:56,654 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:56,657 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:56,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:56,661 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:56,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:55" (1/3) ... [2023-11-26 12:03:56,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1294858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:56, skipping insertion in model container [2023-11-26 12:03:56,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:55" (2/3) ... [2023-11-26 12:03:56,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1294858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:56, skipping insertion in model container [2023-11-26 12:03:56,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:56" (3/3) ... [2023-11-26 12:03:56,665 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-26 12:03:56,675 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:03:56,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:56,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-26 12:03:56,687 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:03:56,737 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 12:03:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 34 transitions, 82 flow [2023-11-26 12:03:56,812 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-11-26 12:03:56,812 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 12:03:56,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 2/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 65 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-26 12:03:56,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 34 transitions, 82 flow [2023-11-26 12:03:56,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 31 transitions, 74 flow [2023-11-26 12:03:56,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:56,839 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;@18e54cbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:56,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-26 12:03:56,848 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:03:56,848 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-26 12:03:56,848 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 12:03:56,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:56,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:03:56,850 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:56,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash 293780992, now seen corresponding path program 1 times [2023-11-26 12:03:56,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:56,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788566614] [2023-11-26 12:03:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:57,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:57,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788566614] [2023-11-26 12:03:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788566614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:57,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718613487] [2023-11-26 12:03:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:57,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:57,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:03:57,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:57,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:03:57,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:57,295 INFO L124 PetriNetUnfolderBase]: 113/221 cut-off events. [2023-11-26 12:03:57,295 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-26 12:03:57,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 221 events. 113/221 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 893 event pairs, 87 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 370. Up to 197 conditions per place. [2023-11-26 12:03:57,301 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 18 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-11-26 12:03:57,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 108 flow [2023-11-26 12:03:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2023-11-26 12:03:57,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2023-11-26 12:03:57,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 57 transitions. [2023-11-26 12:03:57,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 57 transitions. [2023-11-26 12:03:57,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:57,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 57 transitions. [2023-11-26 12:03:57,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,328 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 74 flow. Second operand 3 states and 57 transitions. [2023-11-26 12:03:57,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 108 flow [2023-11-26 12:03:57,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 12:03:57,334 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 64 flow [2023-11-26 12:03:57,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, 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=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-26 12:03:57,340 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2023-11-26 12:03:57,341 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 64 flow [2023-11-26 12:03:57,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:57,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 12:03:57,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:03:57,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:57,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash 293780993, now seen corresponding path program 1 times [2023-11-26 12:03:57,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:57,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080605611] [2023-11-26 12:03:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:57,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:57,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:57,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080605611] [2023-11-26 12:03:57,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080605611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:57,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:57,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:57,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585514742] [2023-11-26 12:03:57,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:57,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:57,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:03:57,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:57,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:03:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:57,622 INFO L124 PetriNetUnfolderBase]: 132/289 cut-off events. [2023-11-26 12:03:57,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 12:03:57,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 289 events. 132/289 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1213 event pairs, 48 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 528. Up to 170 conditions per place. [2023-11-26 12:03:57,628 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 28 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-11-26 12:03:57,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 149 flow [2023-11-26 12:03:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-26 12:03:57,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2023-11-26 12:03:57,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-26 12:03:57,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-26 12:03:57,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:57,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-26 12:03:57,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,642 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,642 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 64 flow. Second operand 3 states and 70 transitions. [2023-11-26 12:03:57,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 149 flow [2023-11-26 12:03:57,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:57,644 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 81 flow [2023-11-26 12:03:57,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-26 12:03:57,646 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2023-11-26 12:03:57,646 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 81 flow [2023-11-26 12:03:57,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:03:57,647 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:57,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1144297085, now seen corresponding path program 1 times [2023-11-26 12:03:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777859063] [2023-11-26 12:03:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:57,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:57,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:57,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777859063] [2023-11-26 12:03:57,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777859063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:57,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:57,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:03:57,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948184961] [2023-11-26 12:03:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:03:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:03:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:03:57,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 12:03:57,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:57,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 12:03:57,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:57,943 INFO L124 PetriNetUnfolderBase]: 232/465 cut-off events. [2023-11-26 12:03:57,943 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-26 12:03:57,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 465 events. 232/465 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2141 event pairs, 103 based on Foata normal form. 14/408 useless extension candidates. Maximal degree in co-relation 983. Up to 323 conditions per place. [2023-11-26 12:03:57,951 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 40 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-11-26 12:03:57,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 225 flow [2023-11-26 12:03:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:03:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:03:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2023-11-26 12:03:57,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6029411764705882 [2023-11-26 12:03:57,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 82 transitions. [2023-11-26 12:03:57,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 82 transitions. [2023-11-26 12:03:57,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:57,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 82 transitions. [2023-11-26 12:03:57,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,957 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 81 flow. Second operand 4 states and 82 transitions. [2023-11-26 12:03:57,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 225 flow [2023-11-26 12:03:57,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 51 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:57,960 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 108 flow [2023-11-26 12:03:57,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-26 12:03:57,961 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-11-26 12:03:57,962 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 108 flow [2023-11-26 12:03:57,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:57,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:57,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:03:57,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:57,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash -998224040, now seen corresponding path program 1 times [2023-11-26 12:03:57,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166218412] [2023-11-26 12:03:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:57,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:58,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:58,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166218412] [2023-11-26 12:03:58,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166218412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:58,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:58,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:03:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745092221] [2023-11-26 12:03:58,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:58,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:58,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:03:58,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:58,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:03:58,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:58,261 INFO L124 PetriNetUnfolderBase]: 225/452 cut-off events. [2023-11-26 12:03:58,262 INFO L125 PetriNetUnfolderBase]: For 160/209 co-relation queries the response was YES. [2023-11-26 12:03:58,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084 conditions, 452 events. 225/452 cut-off events. For 160/209 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2160 event pairs, 118 based on Foata normal form. 17/415 useless extension candidates. Maximal degree in co-relation 1074. Up to 268 conditions per place. [2023-11-26 12:03:58,271 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 35 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-26 12:03:58,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 235 flow [2023-11-26 12:03:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-26 12:03:58,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2023-11-26 12:03:58,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-26 12:03:58,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-26 12:03:58,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:58,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-26 12:03:58,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,282 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 108 flow. Second operand 3 states and 69 transitions. [2023-11-26 12:03:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 235 flow [2023-11-26 12:03:58,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:58,289 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 119 flow [2023-11-26 12:03:58,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-26 12:03:58,291 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-26 12:03:58,291 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 119 flow [2023-11-26 12:03:58,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:58,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:58,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:03:58,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:58,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash -613128952, now seen corresponding path program 1 times [2023-11-26 12:03:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730015882] [2023-11-26 12:03:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:58,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730015882] [2023-11-26 12:03:58,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730015882] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:58,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:58,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:03:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921624282] [2023-11-26 12:03:58,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:58,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:58,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:58,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:03:58,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:03:58,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:58,527 INFO L124 PetriNetUnfolderBase]: 191/388 cut-off events. [2023-11-26 12:03:58,527 INFO L125 PetriNetUnfolderBase]: For 244/281 co-relation queries the response was YES. [2023-11-26 12:03:58,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 388 events. 191/388 cut-off events. For 244/281 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1765 event pairs, 155 based on Foata normal form. 37/387 useless extension candidates. Maximal degree in co-relation 980. Up to 336 conditions per place. [2023-11-26 12:03:58,531 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 21 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-26 12:03:58,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 159 flow [2023-11-26 12:03:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-26 12:03:58,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2023-11-26 12:03:58,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-26 12:03:58,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-26 12:03:58,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:58,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-26 12:03:58,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,539 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 119 flow. Second operand 3 states and 55 transitions. [2023-11-26 12:03:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 159 flow [2023-11-26 12:03:58,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:58,546 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 115 flow [2023-11-26 12:03:58,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-11-26 12:03:58,550 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2023-11-26 12:03:58,550 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 115 flow [2023-11-26 12:03:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:58,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:58,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:03:58,551 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:58,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -598711421, now seen corresponding path program 1 times [2023-11-26 12:03:58,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667462513] [2023-11-26 12:03:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:58,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667462513] [2023-11-26 12:03:58,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667462513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:58,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828020398] [2023-11-26 12:03:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:58,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:58,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:58,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:03:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:58,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:03:58,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:58,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:58,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828020398] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:58,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:58,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-26 12:03:58,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757793870] [2023-11-26 12:03:58,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:58,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:03:58,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:03:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:03:58,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:03:58,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:58,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:03:58,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:59,108 INFO L124 PetriNetUnfolderBase]: 463/1186 cut-off events. [2023-11-26 12:03:59,109 INFO L125 PetriNetUnfolderBase]: For 465/475 co-relation queries the response was YES. [2023-11-26 12:03:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 1186 events. 463/1186 cut-off events. For 465/475 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7070 event pairs, 72 based on Foata normal form. 18/1132 useless extension candidates. Maximal degree in co-relation 2772. Up to 206 conditions per place. [2023-11-26 12:03:59,120 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 67 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2023-11-26 12:03:59,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 92 transitions, 481 flow [2023-11-26 12:03:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:03:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:03:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2023-11-26 12:03:59,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7352941176470589 [2023-11-26 12:03:59,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 150 transitions. [2023-11-26 12:03:59,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 150 transitions. [2023-11-26 12:03:59,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:59,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 150 transitions. [2023-11-26 12:03:59,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:59,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:59,126 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:59,127 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 115 flow. Second operand 6 states and 150 transitions. [2023-11-26 12:03:59,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 92 transitions, 481 flow [2023-11-26 12:03:59,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 92 transitions, 480 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:03:59,134 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 254 flow [2023-11-26 12:03:59,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-26 12:03:59,135 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2023-11-26 12:03:59,135 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 254 flow [2023-11-26 12:03:59,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:59,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:59,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:59,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:03:59,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:59,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:03:59,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash -792077800, now seen corresponding path program 1 times [2023-11-26 12:03:59,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:59,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790749550] [2023-11-26 12:03:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:59,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:59,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790749550] [2023-11-26 12:03:59,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790749550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:03:59,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454823358] [2023-11-26 12:03:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:59,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:03:59,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:59,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:03:59,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:03:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:59,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:03:59,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:03:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:03:59,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:03:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:03:59,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454823358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:03:59,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:03:59,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-11-26 12:03:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524902756] [2023-11-26 12:03:59,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:03:59,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:03:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:59,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:03:59,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:03:59,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2023-11-26 12:03:59,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:59,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:59,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2023-11-26 12:03:59,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:00,137 INFO L124 PetriNetUnfolderBase]: 788/1774 cut-off events. [2023-11-26 12:04:00,137 INFO L125 PetriNetUnfolderBase]: For 2376/2442 co-relation queries the response was YES. [2023-11-26 12:04:00,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4779 conditions, 1774 events. 788/1774 cut-off events. For 2376/2442 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10980 event pairs, 104 based on Foata normal form. 48/1629 useless extension candidates. Maximal degree in co-relation 4762. Up to 472 conditions per place. [2023-11-26 12:04:00,159 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 66 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2023-11-26 12:04:00,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 91 transitions, 612 flow [2023-11-26 12:04:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:04:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:04:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2023-11-26 12:04:00,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756302521008403 [2023-11-26 12:04:00,161 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 137 transitions. [2023-11-26 12:04:00,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 137 transitions. [2023-11-26 12:04:00,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:00,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 137 transitions. [2023-11-26 12:04:00,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.571428571428573) internal successors, (137), 7 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,164 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,164 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 254 flow. Second operand 7 states and 137 transitions. [2023-11-26 12:04:00,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 91 transitions, 612 flow [2023-11-26 12:04:00,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 91 transitions, 596 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-26 12:04:00,177 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 324 flow [2023-11-26 12:04:00,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=324, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-26 12:04:00,179 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2023-11-26 12:04:00,179 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 324 flow [2023-11-26 12:04:00,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:00,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:00,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 12:04:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 12:04:00,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:00,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 163952261, now seen corresponding path program 1 times [2023-11-26 12:04:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:00,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135917274] [2023-11-26 12:04:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:00,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135917274] [2023-11-26 12:04:00,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135917274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:00,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628987537] [2023-11-26 12:04:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:00,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:00,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:04:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 12:04:00,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:00,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:04:00,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628987537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:00,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:04:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 12:04:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692666281] [2023-11-26 12:04:00,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:04:00,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:04:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:04:00,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 12:04:00,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:00,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 12:04:00,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:01,056 INFO L124 PetriNetUnfolderBase]: 830/1781 cut-off events. [2023-11-26 12:04:01,056 INFO L125 PetriNetUnfolderBase]: For 3886/3932 co-relation queries the response was YES. [2023-11-26 12:04:01,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5391 conditions, 1781 events. 830/1781 cut-off events. For 3886/3932 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 10365 event pairs, 160 based on Foata normal form. 82/1761 useless extension candidates. Maximal degree in co-relation 5370. Up to 493 conditions per place. [2023-11-26 12:04:01,078 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 85 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2023-11-26 12:04:01,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 100 transitions, 908 flow [2023-11-26 12:04:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:04:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:04:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2023-11-26 12:04:01,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-11-26 12:04:01,080 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 104 transitions. [2023-11-26 12:04:01,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 104 transitions. [2023-11-26 12:04:01,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:01,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 104 transitions. [2023-11-26 12:04:01,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,083 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,083 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 324 flow. Second operand 6 states and 104 transitions. [2023-11-26 12:04:01,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 100 transitions, 908 flow [2023-11-26 12:04:01,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 100 transitions, 904 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:01,094 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 330 flow [2023-11-26 12:04:01,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-11-26 12:04:01,097 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2023-11-26 12:04:01,097 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 330 flow [2023-11-26 12:04:01,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:01,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 12:04:01,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:01,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:01,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:01,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash 787553117, now seen corresponding path program 1 times [2023-11-26 12:04:01,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:01,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409491322] [2023-11-26 12:04:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:01,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409491322] [2023-11-26 12:04:01,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409491322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:01,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376603273] [2023-11-26 12:04:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:01,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:01,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:01,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:01,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:04:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:01,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 12:04:01,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:01,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:01,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376603273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:01,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:01,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 12:04:01,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042326261] [2023-11-26 12:04:01,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:01,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:04:01,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:04:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:04:01,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 12:04:01,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 330 flow. Second operand has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:01,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 12:04:01,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:02,214 INFO L124 PetriNetUnfolderBase]: 1158/2457 cut-off events. [2023-11-26 12:04:02,215 INFO L125 PetriNetUnfolderBase]: For 6439/6505 co-relation queries the response was YES. [2023-11-26 12:04:02,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7978 conditions, 2457 events. 1158/2457 cut-off events. For 6439/6505 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14976 event pairs, 298 based on Foata normal form. 130/2565 useless extension candidates. Maximal degree in co-relation 7958. Up to 1088 conditions per place. [2023-11-26 12:04:02,246 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 145 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-11-26 12:04:02,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 166 transitions, 1549 flow [2023-11-26 12:04:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:04:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 12:04:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2023-11-26 12:04:02,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352941176470588 [2023-11-26 12:04:02,248 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 182 transitions. [2023-11-26 12:04:02,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 182 transitions. [2023-11-26 12:04:02,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:02,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 182 transitions. [2023-11-26 12:04:02,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.2) internal successors, (182), 10 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,251 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,251 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 330 flow. Second operand 10 states and 182 transitions. [2023-11-26 12:04:02,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 166 transitions, 1549 flow [2023-11-26 12:04:02,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 166 transitions, 1519 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-26 12:04:02,266 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 398 flow [2023-11-26 12:04:02,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=398, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-26 12:04:02,267 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-11-26 12:04:02,267 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 398 flow [2023-11-26 12:04:02,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:02,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:02,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:02,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 12:04:02,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:02,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:02,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1348174151, now seen corresponding path program 1 times [2023-11-26 12:04:02,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:02,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054152568] [2023-11-26 12:04:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:02,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:02,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:02,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054152568] [2023-11-26 12:04:02,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054152568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:02,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:02,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:04:02,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692554018] [2023-11-26 12:04:02,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:02,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:04:02,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:04:02,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:04:02,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:02,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:02,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:02,886 INFO L124 PetriNetUnfolderBase]: 808/1819 cut-off events. [2023-11-26 12:04:02,887 INFO L125 PetriNetUnfolderBase]: For 5243/5289 co-relation queries the response was YES. [2023-11-26 12:04:02,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 1819 events. 808/1819 cut-off events. For 5243/5289 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11286 event pairs, 494 based on Foata normal form. 12/1754 useless extension candidates. Maximal degree in co-relation 6175. Up to 1327 conditions per place. [2023-11-26 12:04:02,912 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 51 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-26 12:04:02,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 577 flow [2023-11-26 12:04:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:04:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:04:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-26 12:04:02,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-26 12:04:02,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-26 12:04:02,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-26 12:04:02,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:02,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-26 12:04:02,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,918 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 398 flow. Second operand 4 states and 74 transitions. [2023-11-26 12:04:02,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 577 flow [2023-11-26 12:04:02,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 567 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:02,932 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 389 flow [2023-11-26 12:04:02,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-11-26 12:04:02,933 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2023-11-26 12:04:02,934 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 389 flow [2023-11-26 12:04:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:02,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:02,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:02,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 12:04:02,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:02,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1209615889, now seen corresponding path program 1 times [2023-11-26 12:04:02,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999853164] [2023-11-26 12:04:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:02,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:03,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999853164] [2023-11-26 12:04:03,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999853164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:03,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370301892] [2023-11-26 12:04:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:03,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:03,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:03,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:04:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:03,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 12:04:03,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:03,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370301892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:03,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:03,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-26 12:04:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992551103] [2023-11-26 12:04:03,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:03,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:04:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:04:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:04:03,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:03,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 389 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:03,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:03,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:03,687 INFO L124 PetriNetUnfolderBase]: 847/1908 cut-off events. [2023-11-26 12:04:03,688 INFO L125 PetriNetUnfolderBase]: For 6478/6554 co-relation queries the response was YES. [2023-11-26 12:04:03,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6137 conditions, 1908 events. 847/1908 cut-off events. For 6478/6554 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11679 event pairs, 141 based on Foata normal form. 110/1959 useless extension candidates. Maximal degree in co-relation 6113. Up to 784 conditions per place. [2023-11-26 12:04:03,716 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 63 selfloop transitions, 18 changer transitions 0/95 dead transitions. [2023-11-26 12:04:03,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 741 flow [2023-11-26 12:04:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:04:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:04:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2023-11-26 12:04:03,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542016806722689 [2023-11-26 12:04:03,718 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 129 transitions. [2023-11-26 12:04:03,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 129 transitions. [2023-11-26 12:04:03,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:03,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 129 transitions. [2023-11-26 12:04:03,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,720 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,720 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 389 flow. Second operand 7 states and 129 transitions. [2023-11-26 12:04:03,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 741 flow [2023-11-26 12:04:03,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 715 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-26 12:04:03,736 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 446 flow [2023-11-26 12:04:03,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=446, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2023-11-26 12:04:03,737 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2023-11-26 12:04:03,737 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 446 flow [2023-11-26 12:04:03,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:03,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:03,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 12:04:03,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:03,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 303206187, now seen corresponding path program 1 times [2023-11-26 12:04:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982593269] [2023-11-26 12:04:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:04:04,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:04,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982593269] [2023-11-26 12:04:04,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982593269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:04,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:04,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:04:04,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848608359] [2023-11-26 12:04:04,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:04,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:04:04,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:04:04,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:04:04,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:04,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:04,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:04,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:04,389 INFO L124 PetriNetUnfolderBase]: 789/1800 cut-off events. [2023-11-26 12:04:04,389 INFO L125 PetriNetUnfolderBase]: For 6518/6598 co-relation queries the response was YES. [2023-11-26 12:04:04,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6275 conditions, 1800 events. 789/1800 cut-off events. For 6518/6598 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11006 event pairs, 445 based on Foata normal form. 40/1785 useless extension candidates. Maximal degree in co-relation 6249. Up to 1256 conditions per place. [2023-11-26 12:04:04,410 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 56 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-11-26 12:04:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 692 flow [2023-11-26 12:04:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:04:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 12:04:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-26 12:04:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-26 12:04:04,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-26 12:04:04,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-26 12:04:04,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:04,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-26 12:04:04,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,414 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 446 flow. Second operand 4 states and 74 transitions. [2023-11-26 12:04:04,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 692 flow [2023-11-26 12:04:04,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 679 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-26 12:04:04,425 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 456 flow [2023-11-26 12:04:04,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=456, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2023-11-26 12:04:04,426 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2023-11-26 12:04:04,426 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 456 flow [2023-11-26 12:04:04,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:04,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:04,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 12:04:04,427 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:04,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash 997705179, now seen corresponding path program 1 times [2023-11-26 12:04:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240136339] [2023-11-26 12:04:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:04:04,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:04,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240136339] [2023-11-26 12:04:04,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240136339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:04,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:04,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:04:04,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463576888] [2023-11-26 12:04:04,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:04,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:04,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:04,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-26 12:04:04,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:04,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-26 12:04:04,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:04,755 INFO L124 PetriNetUnfolderBase]: 767/1748 cut-off events. [2023-11-26 12:04:04,755 INFO L125 PetriNetUnfolderBase]: For 6613/6685 co-relation queries the response was YES. [2023-11-26 12:04:04,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6386 conditions, 1748 events. 767/1748 cut-off events. For 6613/6685 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10789 event pairs, 483 based on Foata normal form. 18/1718 useless extension candidates. Maximal degree in co-relation 6359. Up to 1340 conditions per place. [2023-11-26 12:04:04,805 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 44 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-26 12:04:04,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 57 transitions, 544 flow [2023-11-26 12:04:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2023-11-26 12:04:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-11-26 12:04:04,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 48 transitions. [2023-11-26 12:04:04,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 48 transitions. [2023-11-26 12:04:04,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:04,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 48 transitions. [2023-11-26 12:04:04,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,808 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 456 flow. Second operand 3 states and 48 transitions. [2023-11-26 12:04:04,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 57 transitions, 544 flow [2023-11-26 12:04:04,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 57 transitions, 530 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 12:04:04,819 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 442 flow [2023-11-26 12:04:04,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2023-11-26 12:04:04,820 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-26 12:04:04,820 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 442 flow [2023-11-26 12:04:04,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:04,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:04,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:04,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 12:04:04,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:04,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash 375432974, now seen corresponding path program 1 times [2023-11-26 12:04:04,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:04,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230818766] [2023-11-26 12:04:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:04,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:04,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:04,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230818766] [2023-11-26 12:04:04,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230818766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:04,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809938554] [2023-11-26 12:04:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:04,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:04,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:04,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:04:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:05,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 12:04:05,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:04:05,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:04:05,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809938554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:05,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:04:05,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-26 12:04:05,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404917823] [2023-11-26 12:04:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:05,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:05,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:04:05,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2023-11-26 12:04:05,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:05,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:05,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2023-11-26 12:04:05,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:05,452 INFO L124 PetriNetUnfolderBase]: 767/1734 cut-off events. [2023-11-26 12:04:05,453 INFO L125 PetriNetUnfolderBase]: For 6095/6167 co-relation queries the response was YES. [2023-11-26 12:04:05,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6278 conditions, 1734 events. 767/1734 cut-off events. For 6095/6167 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 10568 event pairs, 483 based on Foata normal form. 18/1708 useless extension candidates. Maximal degree in co-relation 6251. Up to 1322 conditions per place. [2023-11-26 12:04:05,473 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 42 selfloop transitions, 1 changer transitions 3/56 dead transitions. [2023-11-26 12:04:05,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 528 flow [2023-11-26 12:04:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2023-11-26 12:04:05,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2023-11-26 12:04:05,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 50 transitions. [2023-11-26 12:04:05,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 50 transitions. [2023-11-26 12:04:05,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:05,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 50 transitions. [2023-11-26 12:04:05,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:05,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:05,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:05,477 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 442 flow. Second operand 3 states and 50 transitions. [2023-11-26 12:04:05,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 528 flow [2023-11-26 12:04:05,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 56 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:05,489 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 434 flow [2023-11-26 12:04:05,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=434, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-11-26 12:04:05,491 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2023-11-26 12:04:05,491 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 434 flow [2023-11-26 12:04:05,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:05,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:05,491 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-26 12:04:05,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 12:04:05,707 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:05,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash -626757503, now seen corresponding path program 2 times [2023-11-26 12:04:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:05,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669020086] [2023-11-26 12:04:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:05,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:05,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669020086] [2023-11-26 12:04:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669020086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:05,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690438762] [2023-11-26 12:04:05,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:04:05,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:05,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:05,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:05,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:04:05,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:04:05,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:04:05,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 12:04:05,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:05,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:06,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690438762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:06,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:06,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-26 12:04:06,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110437115] [2023-11-26 12:04:06,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:06,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 12:04:06,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 12:04:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:04:06,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:06,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 434 flow. Second operand has 12 states, 12 states have (on average 14.0) internal successors, (168), 12 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:06,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:06,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:06,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:06,870 INFO L124 PetriNetUnfolderBase]: 1773/4128 cut-off events. [2023-11-26 12:04:06,870 INFO L125 PetriNetUnfolderBase]: For 19033/19267 co-relation queries the response was YES. [2023-11-26 12:04:06,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14958 conditions, 4128 events. 1773/4128 cut-off events. For 19033/19267 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27597 event pairs, 167 based on Foata normal form. 176/4296 useless extension candidates. Maximal degree in co-relation 14930. Up to 779 conditions per place. [2023-11-26 12:04:06,911 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 131 selfloop transitions, 63 changer transitions 8/212 dead transitions. [2023-11-26 12:04:06,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 212 transitions, 1949 flow [2023-11-26 12:04:06,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 12:04:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 12:04:06,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2023-11-26 12:04:06,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6838235294117647 [2023-11-26 12:04:06,914 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 279 transitions. [2023-11-26 12:04:06,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 279 transitions. [2023-11-26 12:04:06,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:06,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 279 transitions. [2023-11-26 12:04:06,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 23.25) internal successors, (279), 12 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:06,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 34.0) internal successors, (442), 13 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:06,918 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 34.0) internal successors, (442), 13 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:06,918 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 434 flow. Second operand 12 states and 279 transitions. [2023-11-26 12:04:06,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 212 transitions, 1949 flow [2023-11-26 12:04:06,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 212 transitions, 1948 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:06,944 INFO L231 Difference]: Finished difference. Result has 86 places, 107 transitions, 1353 flow [2023-11-26 12:04:06,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1353, PETRI_PLACES=86, PETRI_TRANSITIONS=107} [2023-11-26 12:04:06,946 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2023-11-26 12:04:06,946 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 107 transitions, 1353 flow [2023-11-26 12:04:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.0) internal successors, (168), 12 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:06,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:06,947 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2023-11-26 12:04:06,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:07,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 12:04:07,158 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:07,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:07,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1509620321, now seen corresponding path program 2 times [2023-11-26 12:04:07,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:07,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173250441] [2023-11-26 12:04:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:07,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:07,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:07,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173250441] [2023-11-26 12:04:07,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173250441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637519700] [2023-11-26 12:04:07,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:04:07,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:07,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:07,316 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:07,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:04:07,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-26 12:04:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:04:07,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:04:07,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 12:04:07,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 12:04:07,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637519700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:07,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:07,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-26 12:04:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981766888] [2023-11-26 12:04:07,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 12:04:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 12:04:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:04:07,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2023-11-26 12:04:07,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 107 transitions, 1353 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:07,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:07,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2023-11-26 12:04:07,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:09,205 INFO L124 PetriNetUnfolderBase]: 3411/6392 cut-off events. [2023-11-26 12:04:09,205 INFO L125 PetriNetUnfolderBase]: For 41991/42223 co-relation queries the response was YES. [2023-11-26 12:04:09,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25802 conditions, 6392 events. 3411/6392 cut-off events. For 41991/42223 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 38067 event pairs, 491 based on Foata normal form. 296/6688 useless extension candidates. Maximal degree in co-relation 25763. Up to 1890 conditions per place. [2023-11-26 12:04:09,272 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 346 selfloop transitions, 20 changer transitions 6/375 dead transitions. [2023-11-26 12:04:09,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 375 transitions, 5562 flow [2023-11-26 12:04:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 12:04:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 12:04:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 237 transitions. [2023-11-26 12:04:09,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4647058823529412 [2023-11-26 12:04:09,275 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 237 transitions. [2023-11-26 12:04:09,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 237 transitions. [2023-11-26 12:04:09,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:09,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 237 transitions. [2023-11-26 12:04:09,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 15.8) internal successors, (237), 15 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:09,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 34.0) internal successors, (544), 16 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:09,278 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 34.0) internal successors, (544), 16 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:09,279 INFO L175 Difference]: Start difference. First operand has 86 places, 107 transitions, 1353 flow. Second operand 15 states and 237 transitions. [2023-11-26 12:04:09,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 375 transitions, 5562 flow [2023-11-26 12:04:09,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 375 transitions, 5092 flow, removed 231 selfloop flow, removed 4 redundant places. [2023-11-26 12:04:09,341 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 1262 flow [2023-11-26 12:04:09,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1262, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2023-11-26 12:04:09,342 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 60 predicate places. [2023-11-26 12:04:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 1262 flow [2023-11-26 12:04:09,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:09,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:09,343 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-26 12:04:09,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 12:04:09,550 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:09,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1788789825, now seen corresponding path program 3 times [2023-11-26 12:04:09,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:09,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596725817] [2023-11-26 12:04:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:09,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:09,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596725817] [2023-11-26 12:04:09,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596725817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:09,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605321492] [2023-11-26 12:04:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:04:09,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:09,799 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:09,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:04:09,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-26 12:04:09,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:04:09,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 12:04:09,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:10,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605321492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:10,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:10,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-11-26 12:04:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339426539] [2023-11-26 12:04:10,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:10,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:04:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:04:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:04:10,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:10,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 1262 flow. Second operand has 24 states, 24 states have (on average 14.0) internal successors, (336), 24 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:10,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:10,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:10,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:13,392 INFO L124 PetriNetUnfolderBase]: 5067/11160 cut-off events. [2023-11-26 12:04:13,392 INFO L125 PetriNetUnfolderBase]: For 99743/100625 co-relation queries the response was YES. [2023-11-26 12:04:13,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44074 conditions, 11160 events. 5067/11160 cut-off events. For 99743/100625 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 76664 event pairs, 403 based on Foata normal form. 560/11709 useless extension candidates. Maximal degree in co-relation 44036. Up to 2507 conditions per place. [2023-11-26 12:04:13,507 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 254 selfloop transitions, 247 changer transitions 12/524 dead transitions. [2023-11-26 12:04:13,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 524 transitions, 5621 flow [2023-11-26 12:04:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 12:04:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 12:04:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 567 transitions. [2023-11-26 12:04:13,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948529411764706 [2023-11-26 12:04:13,512 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 567 transitions. [2023-11-26 12:04:13,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 567 transitions. [2023-11-26 12:04:13,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:13,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 567 transitions. [2023-11-26 12:04:13,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 23.625) internal successors, (567), 24 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:13,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 34.0) internal successors, (850), 25 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:13,519 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 34.0) internal successors, (850), 25 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:13,519 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 1262 flow. Second operand 24 states and 567 transitions. [2023-11-26 12:04:13,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 524 transitions, 5621 flow [2023-11-26 12:04:13,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 524 transitions, 5388 flow, removed 65 selfloop flow, removed 11 redundant places. [2023-11-26 12:04:13,610 INFO L231 Difference]: Finished difference. Result has 130 places, 297 transitions, 4443 flow [2023-11-26 12:04:13,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4443, PETRI_PLACES=130, PETRI_TRANSITIONS=297} [2023-11-26 12:04:13,611 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 94 predicate places. [2023-11-26 12:04:13,611 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 297 transitions, 4443 flow [2023-11-26 12:04:13,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.0) internal successors, (336), 24 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:13,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:13,612 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2023-11-26 12:04:13,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:13,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 12:04:13,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:13,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:13,819 INFO L85 PathProgramCache]: Analyzing trace with hash 953695169, now seen corresponding path program 4 times [2023-11-26 12:04:13,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:13,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89828611] [2023-11-26 12:04:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:14,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:14,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89828611] [2023-11-26 12:04:14,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89828611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:14,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855382126] [2023-11-26 12:04:14,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:04:14,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:14,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:14,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:14,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:04:14,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:04:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:04:14,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-26 12:04:14,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:15,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:16,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855382126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:16,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:16,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-26 12:04:16,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309591733] [2023-11-26 12:04:16,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-26 12:04:16,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:16,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-26 12:04:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 12:04:16,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:16,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 297 transitions, 4443 flow. Second operand has 49 states, 49 states have (on average 14.040816326530612) internal successors, (688), 49 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:16,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:16,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:16,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:26,731 INFO L124 PetriNetUnfolderBase]: 13933/30458 cut-off events. [2023-11-26 12:04:26,732 INFO L125 PetriNetUnfolderBase]: For 715500/716982 co-relation queries the response was YES. [2023-11-26 12:04:27,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123568 conditions, 30458 events. 13933/30458 cut-off events. For 715500/716982 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 224941 event pairs, 1339 based on Foata normal form. 1376/31780 useless extension candidates. Maximal degree in co-relation 123508. Up to 5589 conditions per place. [2023-11-26 12:04:27,199 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 474 selfloop transitions, 911 changer transitions 12/1408 dead transitions. [2023-11-26 12:04:27,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 1408 transitions, 19008 flow [2023-11-26 12:04:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-26 12:04:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-26 12:04:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1159 transitions. [2023-11-26 12:04:27,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956782713085234 [2023-11-26 12:04:27,207 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 1159 transitions. [2023-11-26 12:04:27,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 1159 transitions. [2023-11-26 12:04:27,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:27,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 1159 transitions. [2023-11-26 12:04:27,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 23.653061224489797) internal successors, (1159), 49 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:27,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 34.0) internal successors, (1700), 50 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:27,224 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 34.0) internal successors, (1700), 50 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:27,224 INFO L175 Difference]: Start difference. First operand has 130 places, 297 transitions, 4443 flow. Second operand 49 states and 1159 transitions. [2023-11-26 12:04:27,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 1408 transitions, 19008 flow [2023-11-26 12:04:27,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1408 transitions, 16024 flow, removed 1454 selfloop flow, removed 5 redundant places. [2023-11-26 12:04:27,699 INFO L231 Difference]: Finished difference. Result has 219 places, 963 transitions, 15118 flow [2023-11-26 12:04:27,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=15118, PETRI_PLACES=219, PETRI_TRANSITIONS=963} [2023-11-26 12:04:27,700 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 183 predicate places. [2023-11-26 12:04:27,701 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 963 transitions, 15118 flow [2023-11-26 12:04:27,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 14.040816326530612) internal successors, (688), 49 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:27,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:27,702 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2023-11-26 12:04:27,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-26 12:04:27,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 12:04:27,909 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-26 12:04:27,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1374579393, now seen corresponding path program 5 times [2023-11-26 12:04:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:27,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249304959] [2023-11-26 12:04:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:31,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249304959] [2023-11-26 12:04:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249304959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642212923] [2023-11-26 12:04:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 12:04:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:31,063 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:31,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ee27ea-a96b-4734-8b87-b301000b3969/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 12:04:31,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-11-26 12:04:31,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:04:31,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-26 12:04:31,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:31,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:35,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642212923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:35,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:35,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2023-11-26 12:04:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285254666] [2023-11-26 12:04:35,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:35,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-26 12:04:35,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-26 12:04:35,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2023-11-26 12:04:35,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2023-11-26 12:04:35,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 963 transitions, 15118 flow. Second operand has 96 states, 96 states have (on average 14.0) internal successors, (1344), 96 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:35,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2023-11-26 12:04:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand