./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 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_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/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_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/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_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/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 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:22,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:22,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:53:22,215 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:22,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:22,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:22,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:22,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:22,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:22,262 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:22,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:22,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:22,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:22,268 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:22,269 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:22,269 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:22,270 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:53:22,270 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:22,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:22,271 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:22,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:22,272 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:53:22,272 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:22,273 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:53:22,273 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:53:22,274 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:53:22,275 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:22,275 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:53:22,276 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:22,277 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:22,278 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:22,278 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:22,278 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:22,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:22,279 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:22,279 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:22,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:53:22,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:22,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:22,280 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:22,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:22,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:53:22,282 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:22,282 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:22,283 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_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2023-11-26 11:53:22,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:22,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:22,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:22,637 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:22,638 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:22,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2023-11-26 11:53:25,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:26,041 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:26,042 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2023-11-26 11:53:26,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/data/606e8c928/69321428e922473992c42b1695d2060b/FLAG98aab079a [2023-11-26 11:53:26,069 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/data/606e8c928/69321428e922473992c42b1695d2060b [2023-11-26 11:53:26,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:26,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:26,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:26,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:26,082 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:26,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ad9fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26, skipping insertion in model container [2023-11-26 11:53:26,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,118 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:26,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:26,501 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:26,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:26,601 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:26,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26 WrapperNode [2023-11-26 11:53:26,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:26,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:26,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:26,607 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:26,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,709 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 371 [2023-11-26 11:53:26,710 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:26,711 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:26,711 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:26,711 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:26,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,757 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,789 INFO L175 MemorySlicer]: Split 12 memory accesses to 5 slices as follows [2, 4, 2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-26 11:53:26,825 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,828 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,867 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,896 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,898 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:26,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:26,905 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:26,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:26,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (1/1) ... [2023-11-26 11:53:26,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:26,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:26,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:53:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:53:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:53:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:53:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:53:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:53:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:53:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:53:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:53:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:53:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:53:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:53:27,005 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:53:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:53:27,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:53:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:53:27,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:53:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:53:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:53:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:53:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:53:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:53:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:27,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:53:27,012 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 11:53:27,169 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:27,172 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:27,890 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:28,393 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:28,393 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-26 11:53:28,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:28 BoogieIcfgContainer [2023-11-26 11:53:28,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:28,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:28,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:28,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:28,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:26" (1/3) ... [2023-11-26 11:53:28,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf10baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:28, skipping insertion in model container [2023-11-26 11:53:28,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:26" (2/3) ... [2023-11-26 11:53:28,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf10baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:28, skipping insertion in model container [2023-11-26 11:53:28,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:28" (3/3) ... [2023-11-26 11:53:28,404 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2023-11-26 11:53:28,414 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:53:28,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:28,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-26 11:53:28,424 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:53:28,523 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 11:53:28,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 251 flow [2023-11-26 11:53:28,638 INFO L124 PetriNetUnfolderBase]: 16/112 cut-off events. [2023-11-26 11:53:28,638 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 11:53:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 16/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 436 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-26 11:53:28,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 115 transitions, 251 flow [2023-11-26 11:53:28,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 110 transitions, 235 flow [2023-11-26 11:53:28,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:28,681 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;@16f99d07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:28,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2023-11-26 11:53:28,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:53:28,689 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-26 11:53:28,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:53:28,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:28,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:53:28,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:53:28,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1023587, now seen corresponding path program 1 times [2023-11-26 11:53:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:28,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403917703] [2023-11-26 11:53:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:29,116 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 11:53:29,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:29,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403917703] [2023-11-26 11:53:29,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403917703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:29,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:29,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906844146] [2023-11-26 11:53:29,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:29,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:29,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:29,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 115 [2023-11-26 11:53:29,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 11:53:29,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:29,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 115 [2023-11-26 11:53:29,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:32,419 INFO L124 PetriNetUnfolderBase]: 10397/18956 cut-off events. [2023-11-26 11:53:32,420 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-11-26 11:53:32,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33035 conditions, 18956 events. 10397/18956 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 163235 event pairs, 6969 based on Foata normal form. 799/15680 useless extension candidates. Maximal degree in co-relation 30822. Up to 13703 conditions per place. [2023-11-26 11:53:32,632 INFO L140 encePairwiseOnDemand]: 106/115 looper letters, 54 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2023-11-26 11:53:32,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 110 transitions, 351 flow [2023-11-26 11:53:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-11-26 11:53:32,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6152173913043478 [2023-11-26 11:53:32,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-11-26 11:53:32,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-11-26 11:53:32,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:32,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-11-26 11:53:32,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 11:53:32,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 11:53:32,664 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 11:53:32,666 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 235 flow. Second operand 4 states and 283 transitions. [2023-11-26 11:53:32,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 110 transitions, 351 flow [2023-11-26 11:53:32,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 110 transitions, 342 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-26 11:53:32,687 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 249 flow [2023-11-26 11:53:32,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2023-11-26 11:53:32,693 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 0 predicate places. [2023-11-26 11:53:32,694 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 249 flow [2023-11-26 11:53:32,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 11:53:32,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:32,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-26 11:53:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:53:32,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:53:32,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 429965506, now seen corresponding path program 1 times [2023-11-26 11:53:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:32,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676963344] [2023-11-26 11:53:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:32,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:32,954 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 11:53:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:32,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676963344] [2023-11-26 11:53:32,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676963344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:32,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966088186] [2023-11-26 11:53:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:32,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:32,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:32,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:32,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:33,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:53:33,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:33,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:33,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966088186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:33,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:53:33,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 11:53:33,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522352095] [2023-11-26 11:53:33,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:33,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:53:33,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:53:33,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 115 [2023-11-26 11:53:33,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 249 flow. Second operand has 6 states, 6 states have (on average 55.833333333333336) internal successors, (335), 6 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 11:53:33,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:33,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 115 [2023-11-26 11:53:33,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:35,793 INFO L124 PetriNetUnfolderBase]: 10397/18955 cut-off events. [2023-11-26 11:53:35,793 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-26 11:53:35,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32909 conditions, 18955 events. 10397/18955 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 163210 event pairs, 6969 based on Foata normal form. 1/14882 useless extension candidates. Maximal degree in co-relation 32882. Up to 13698 conditions per place. [2023-11-26 11:53:35,971 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 50 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2023-11-26 11:53:35,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 359 flow [2023-11-26 11:53:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:53:35,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:53:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 388 transitions. [2023-11-26 11:53:35,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623188405797102 [2023-11-26 11:53:35,985 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 388 transitions. [2023-11-26 11:53:35,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 388 transitions. [2023-11-26 11:53:35,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:35,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 388 transitions. [2023-11-26 11:53:35,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.66666666666667) internal successors, (388), 6 states have internal predecessors, (388), 0 states have call successors, (0), 0 states 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 11:53:35,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 11:53:35,996 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 11:53:35,996 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 249 flow. Second operand 6 states and 388 transitions. [2023-11-26 11:53:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 359 flow [2023-11-26 11:53:35,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:36,003 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 256 flow [2023-11-26 11:53:36,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2023-11-26 11:53:36,005 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-11-26 11:53:36,005 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 256 flow [2023-11-26 11:53:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.833333333333336) internal successors, (335), 6 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 11:53:36,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:36,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:36,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:36,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:36,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:53:36,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash 594419976, now seen corresponding path program 1 times [2023-11-26 11:53:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124680159] [2023-11-26 11:53:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:36,386 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 11:53:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124680159] [2023-11-26 11:53:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124680159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:36,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:36,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:36,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203025736] [2023-11-26 11:53:36,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:36,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:36,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:36,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:36,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:36,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 115 [2023-11-26 11:53:36,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:36,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:36,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 115 [2023-11-26 11:53:36,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:40,582 INFO L124 PetriNetUnfolderBase]: 22151/39815 cut-off events. [2023-11-26 11:53:40,582 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-26 11:53:40,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69596 conditions, 39815 events. 22151/39815 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 1816. Compared 373340 event pairs, 9965 based on Foata normal form. 314/31911 useless extension candidates. Maximal degree in co-relation 69566. Up to 16313 conditions per place. [2023-11-26 11:53:40,964 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 133 selfloop transitions, 3 changer transitions 0/187 dead transitions. [2023-11-26 11:53:40,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 692 flow [2023-11-26 11:53:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-11-26 11:53:40,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2023-11-26 11:53:40,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-11-26 11:53:40,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-11-26 11:53:40,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:40,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-11-26 11:53:40,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 11:53:40,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 11:53:40,973 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 11:53:40,973 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 256 flow. Second operand 4 states and 355 transitions. [2023-11-26 11:53:40,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 692 flow [2023-11-26 11:53:40,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 670 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-26 11:53:40,981 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 256 flow [2023-11-26 11:53:40,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-11-26 11:53:40,983 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2023-11-26 11:53:40,983 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 256 flow [2023-11-26 11:53:40,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:40,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:40,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-26 11:53:40,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:53:40,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:53:40,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 444029860, now seen corresponding path program 1 times [2023-11-26 11:53:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:40,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406936196] [2023-11-26 11:53:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:40,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:41,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406936196] [2023-11-26 11:53:41,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406936196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:41,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446481641] [2023-11-26 11:53:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:41,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:41,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:41,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:41,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:53:41,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:41,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:53:41,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446481641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:53:41,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:53:41,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 11:53:41,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372912599] [2023-11-26 11:53:41,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:41,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:53:41,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:53:41,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:53:41,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 115 [2023-11-26 11:53:41,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 256 flow. Second operand has 12 states, 12 states have (on average 56.083333333333336) internal successors, (673), 12 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:41,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:41,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 115 [2023-11-26 11:53:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:44,870 INFO L124 PetriNetUnfolderBase]: 20058/36461 cut-off events. [2023-11-26 11:53:44,870 INFO L125 PetriNetUnfolderBase]: For 2421/2908 co-relation queries the response was YES. [2023-11-26 11:53:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65074 conditions, 36461 events. 20058/36461 cut-off events. For 2421/2908 co-relation queries the response was YES. Maximal size of possible extension queue 1660. Compared 341653 event pairs, 13627 based on Foata normal form. 3/29101 useless extension candidates. Maximal degree in co-relation 65022. Up to 26417 conditions per place. [2023-11-26 11:53:45,338 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 55 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2023-11-26 11:53:45,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 120 transitions, 422 flow [2023-11-26 11:53:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 11:53:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 11:53:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 619 transitions. [2023-11-26 11:53:45,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382608695652173 [2023-11-26 11:53:45,347 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 619 transitions. [2023-11-26 11:53:45,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 619 transitions. [2023-11-26 11:53:45,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:45,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 619 transitions. [2023-11-26 11:53:45,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.9) internal successors, (619), 10 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 11:53:45,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states 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 11:53:45,357 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states 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 11:53:45,357 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 256 flow. Second operand 10 states and 619 transitions. [2023-11-26 11:53:45,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 120 transitions, 422 flow [2023-11-26 11:53:45,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 120 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:53:45,367 INFO L231 Difference]: Finished difference. Result has 118 places, 120 transitions, 328 flow [2023-11-26 11:53:45,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=118, PETRI_TRANSITIONS=120} [2023-11-26 11:53:45,369 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 14 predicate places. [2023-11-26 11:53:45,369 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 120 transitions, 328 flow [2023-11-26 11:53:45,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 56.083333333333336) internal successors, (673), 12 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:53:45,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:45,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:45,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:45,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4967e5-f0ba-4b5d-a52b-58347e648cb1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:45,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:53:45,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1507686080, now seen corresponding path program 1 times [2023-11-26 11:53:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:45,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612202161] [2023-11-26 11:53:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:45,695 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 11:53:45,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612202161] [2023-11-26 11:53:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612202161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:45,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:45,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:53:45,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383470147] [2023-11-26 11:53:45,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:45,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:45,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:45,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 115 [2023-11-26 11:53:45,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 120 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:53:45,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:45,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 115 [2023-11-26 11:53:45,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:53:53,940 INFO L124 PetriNetUnfolderBase]: 41260/76409 cut-off events. [2023-11-26 11:53:53,940 INFO L125 PetriNetUnfolderBase]: For 4120/5152 co-relation queries the response was YES. [2023-11-26 11:53:54,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134896 conditions, 76409 events. 41260/76409 cut-off events. For 4120/5152 co-relation queries the response was YES. Maximal size of possible extension queue 3289. Compared 800537 event pairs, 18569 based on Foata normal form. 646/61577 useless extension candidates. Maximal degree in co-relation 134860. Up to 30054 conditions per place. [2023-11-26 11:53:54,651 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 146 selfloop transitions, 3 changer transitions 0/200 dead transitions. [2023-11-26 11:53:54,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 200 transitions, 817 flow [2023-11-26 11:53:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:53:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 353 transitions. [2023-11-26 11:53:54,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7673913043478261 [2023-11-26 11:53:54,659 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 353 transitions. [2023-11-26 11:53:54,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 353 transitions. [2023-11-26 11:53:54,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:53:54,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 353 transitions. [2023-11-26 11:53:54,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 11:53:54,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 11:53:54,664 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 11:53:54,665 INFO L175 Difference]: Start difference. First operand has 118 places, 120 transitions, 328 flow. Second operand 4 states and 353 transitions. [2023-11-26 11:53:54,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 200 transitions, 817 flow [2023-11-26 11:53:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 806 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 11:53:54,676 INFO L231 Difference]: Finished difference. Result has 121 places, 122 transitions, 339 flow [2023-11-26 11:53:54,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=121, PETRI_TRANSITIONS=122} [2023-11-26 11:53:54,680 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 17 predicate places. [2023-11-26 11:53:54,680 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 122 transitions, 339 flow [2023-11-26 11:53:54,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 11:53:54,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:53:54,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:53:54,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:53:54,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:53:54,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:54,682 INFO L85 PathProgramCache]: Analyzing trace with hash 215480772, now seen corresponding path program 1 times [2023-11-26 11:53:54,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:54,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485368121] [2023-11-26 11:53:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:54,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:54,777 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 11:53:54,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:54,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485368121] [2023-11-26 11:53:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485368121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:54,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:54,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:53:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889011565] [2023-11-26 11:53:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:54,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 115 [2023-11-26 11:53:54,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 122 transitions, 339 flow. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 11:53:54,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:53:54,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 115 [2023-11-26 11:53:54,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:01,979 INFO L124 PetriNetUnfolderBase]: 36128/59541 cut-off events. [2023-11-26 11:54:01,980 INFO L125 PetriNetUnfolderBase]: For 8605/10555 co-relation queries the response was YES. [2023-11-26 11:54:02,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115739 conditions, 59541 events. 36128/59541 cut-off events. For 8605/10555 co-relation queries the response was YES. Maximal size of possible extension queue 2212. Compared 526645 event pairs, 13843 based on Foata normal form. 0/51253 useless extension candidates. Maximal degree in co-relation 115701. Up to 25584 conditions per place. [2023-11-26 11:54:02,406 INFO L140 encePairwiseOnDemand]: 110/115 looper letters, 177 selfloop transitions, 4 changer transitions 0/234 dead transitions. [2023-11-26 11:54:02,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 234 transitions, 980 flow [2023-11-26 11:54:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 447 transitions. [2023-11-26 11:54:02,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7773913043478261 [2023-11-26 11:54:02,409 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 447 transitions. [2023-11-26 11:54:02,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 447 transitions. [2023-11-26 11:54:02,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:02,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 447 transitions. [2023-11-26 11:54:02,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 11:54:02,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 11:54:02,420 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states 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 11:54:02,421 INFO L175 Difference]: Start difference. First operand has 121 places, 122 transitions, 339 flow. Second operand 5 states and 447 transitions. [2023-11-26 11:54:02,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 234 transitions, 980 flow [2023-11-26 11:54:02,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 234 transitions, 972 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:02,518 INFO L231 Difference]: Finished difference. Result has 127 places, 124 transitions, 362 flow [2023-11-26 11:54:02,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=127, PETRI_TRANSITIONS=124} [2023-11-26 11:54:02,520 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 23 predicate places. [2023-11-26 11:54:02,520 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 124 transitions, 362 flow [2023-11-26 11:54:02,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 11:54:02,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:02,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:02,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:54:02,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 50 more)] === [2023-11-26 11:54:02,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash -990493526, now seen corresponding path program 1 times [2023-11-26 11:54:02,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:02,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389694868] [2023-11-26 11:54:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:02,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:02,615 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 11:54:02,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389694868] [2023-11-26 11:54:02,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389694868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:02,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:02,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:02,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821953835] [2023-11-26 11:54:02,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:02,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:02,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:02,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:02,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 115 [2023-11-26 11:54:02,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 124 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 57.5) internal successors, (230), 4 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:54:02,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:02,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 115 [2023-11-26 11:54:02,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand