./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --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_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/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_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/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_abde2fca-c53d-4bdb-9f31-758e7711ffb2/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 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:10,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:10,731 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 11:47:10,740 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:10,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:10,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:10,784 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:10,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:10,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:10,791 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:10,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:10,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:10,793 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:10,795 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:10,795 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:10,796 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:10,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:47:10,797 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:10,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:10,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:10,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:10,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:47:10,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:10,800 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:47:10,800 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 11:47:10,800 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:47:10,801 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:10,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:47:10,801 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:10,802 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:10,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:10,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:10,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:10,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:10,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:10,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:10,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:47:10,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:10,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:10,806 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:10,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:10,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:47:10,806 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:10,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:10,807 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_abde2fca-c53d-4bdb-9f31-758e7711ffb2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2023-11-26 11:47:11,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:11,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:11,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:11,105 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:11,105 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:11,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-26 11:47:14,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:14,807 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:14,807 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-26 11:47:14,826 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/data/65332808d/122d935f41c4434990910f3e5c95d3ba/FLAG793c0e3fa [2023-11-26 11:47:14,840 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/data/65332808d/122d935f41c4434990910f3e5c95d3ba [2023-11-26 11:47:14,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:14,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:14,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:14,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:14,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:14,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:14" (1/1) ... [2023-11-26 11:47:14,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f600fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:14, skipping insertion in model container [2023-11-26 11:47:14,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:14" (1/1) ... [2023-11-26 11:47:14,922 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:15,619 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:15,636 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:15,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:15,789 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:15,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15 WrapperNode [2023-11-26 11:47:15,790 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:15,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:15,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:15,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:15,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:15,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:15,938 INFO L138 Inliner]: procedures = 275, calls = 61, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 226 [2023-11-26 11:47:15,938 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:15,939 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:15,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:15,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:15,953 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:15,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:15,969 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,010 INFO L175 MemorySlicer]: Split 38 memory accesses to 6 slices as follows [2, 5, 3, 2, 2, 24]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0, 0]. The 15 writes are split as follows [0, 0, 2, 1, 1, 11]. [2023-11-26 11:47:16,018 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,059 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,064 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,068 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:16,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:16,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:16,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:16,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (1/1) ... [2023-11-26 11:47:16,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:16,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:16,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:16,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 11:47:16,179 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 11:47:16,179 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 11:47:16,180 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 11:47:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:16,180 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:47:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:47:16,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:47:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:47:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:47:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:47:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:47:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:47:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:47:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:47:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:47:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:47:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:47:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:47:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:47:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:47:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:47:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:47:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:16,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:16,192 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 11:47:16,453 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:16,456 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:16,860 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:17,267 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:17,267 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:47:17,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:17 BoogieIcfgContainer [2023-11-26 11:47:17,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:17,271 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:17,271 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:17,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:17,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:14" (1/3) ... [2023-11-26 11:47:17,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c616f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:17, skipping insertion in model container [2023-11-26 11:47:17,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:15" (2/3) ... [2023-11-26 11:47:17,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c616f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:17, skipping insertion in model container [2023-11-26 11:47:17,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:17" (3/3) ... [2023-11-26 11:47:17,278 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-11-26 11:47:17,289 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:47:17,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:17,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-26 11:47:17,301 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:47:17,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:47:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 62 transitions, 138 flow [2023-11-26 11:47:17,489 INFO L124 PetriNetUnfolderBase]: 7/60 cut-off events. [2023-11-26 11:47:17,489 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:47:17,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 60 events. 7/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 175 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-26 11:47:17,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 62 transitions, 138 flow [2023-11-26 11:47:17,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 58 transitions, 125 flow [2023-11-26 11:47:17,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:17,532 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;@587c6d53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:17,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-26 11:47:17,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:47:17,550 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-26 11:47:17,550 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:47:17,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:17,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:17,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:17,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1388236445, now seen corresponding path program 1 times [2023-11-26 11:47:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:17,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135700580] [2023-11-26 11:47:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:18,549 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 11:47:18,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:18,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135700580] [2023-11-26 11:47:18,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135700580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:18,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:18,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565722669] [2023-11-26 11:47:18,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:18,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:18,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:18,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-26 11:47:18,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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 11:47:18,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:18,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-26 11:47:18,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:19,285 INFO L124 PetriNetUnfolderBase]: 1047/2136 cut-off events. [2023-11-26 11:47:19,285 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-26 11:47:19,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3847 conditions, 2136 events. 1047/2136 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13850 event pairs, 224 based on Foata normal form. 42/1799 useless extension candidates. Maximal degree in co-relation 3596. Up to 1152 conditions per place. [2023-11-26 11:47:19,313 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 83 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2023-11-26 11:47:19,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 110 transitions, 416 flow [2023-11-26 11:47:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:47:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 208 transitions. [2023-11-26 11:47:19,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6709677419354839 [2023-11-26 11:47:19,332 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 208 transitions. [2023-11-26 11:47:19,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 208 transitions. [2023-11-26 11:47:19,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:19,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 208 transitions. [2023-11-26 11:47:19,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states 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 11:47:19,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 11:47:19,350 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 11:47:19,352 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 125 flow. Second operand 5 states and 208 transitions. [2023-11-26 11:47:19,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 110 transitions, 416 flow [2023-11-26 11:47:19,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 407 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:47:19,369 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 166 flow [2023-11-26 11:47:19,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-26 11:47:19,375 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-11-26 11:47:19,376 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 166 flow [2023-11-26 11:47:19,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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 11:47:19,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:19,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:19,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:19,379 INFO L85 PathProgramCache]: Analyzing trace with hash -711202270, now seen corresponding path program 1 times [2023-11-26 11:47:19,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:19,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601164321] [2023-11-26 11:47:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:19,780 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 11:47:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601164321] [2023-11-26 11:47:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601164321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:19,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:19,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114623528] [2023-11-26 11:47:19,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:19,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:47:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:47:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:19,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-26 11:47:19,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:47:19,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:19,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-26 11:47:19,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:20,392 INFO L124 PetriNetUnfolderBase]: 1179/2382 cut-off events. [2023-11-26 11:47:20,393 INFO L125 PetriNetUnfolderBase]: For 335/343 co-relation queries the response was YES. [2023-11-26 11:47:20,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4676 conditions, 2382 events. 1179/2382 cut-off events. For 335/343 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15303 event pairs, 218 based on Foata normal form. 50/2083 useless extension candidates. Maximal degree in co-relation 4318. Up to 1236 conditions per place. [2023-11-26 11:47:20,415 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 110 selfloop transitions, 11 changer transitions 0/142 dead transitions. [2023-11-26 11:47:20,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 142 transitions, 587 flow [2023-11-26 11:47:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:47:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:47:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 285 transitions. [2023-11-26 11:47:20,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566820276497696 [2023-11-26 11:47:20,419 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 285 transitions. [2023-11-26 11:47:20,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 285 transitions. [2023-11-26 11:47:20,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:20,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 285 transitions. [2023-11-26 11:47:20,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 40.714285714285715) internal successors, (285), 7 states have internal predecessors, (285), 0 states have call successors, (0), 0 states 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 11:47:20,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 11:47:20,424 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 11:47:20,424 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 166 flow. Second operand 7 states and 285 transitions. [2023-11-26 11:47:20,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 142 transitions, 587 flow [2023-11-26 11:47:20,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 142 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:47:20,432 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 235 flow [2023-11-26 11:47:20,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2023-11-26 11:47:20,433 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 13 predicate places. [2023-11-26 11:47:20,433 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 235 flow [2023-11-26 11:47:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 11:47:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:47:20,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1691643503, now seen corresponding path program 1 times [2023-11-26 11:47:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575157732] [2023-11-26 11:47:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:20,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:20,528 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 11:47:20,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:20,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575157732] [2023-11-26 11:47:20,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575157732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:20,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:20,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761978433] [2023-11-26 11:47:20,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:20,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:20,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:20,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2023-11-26 11:47:20,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 11:47:20,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:20,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2023-11-26 11:47:20,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:20,788 INFO L124 PetriNetUnfolderBase]: 548/1241 cut-off events. [2023-11-26 11:47:20,789 INFO L125 PetriNetUnfolderBase]: For 349/349 co-relation queries the response was YES. [2023-11-26 11:47:20,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 1241 events. 548/1241 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 7394 event pairs, 313 based on Foata normal form. 30/1155 useless extension candidates. Maximal degree in co-relation 2523. Up to 528 conditions per place. [2023-11-26 11:47:20,799 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 43 selfloop transitions, 2 changer transitions 7/75 dead transitions. [2023-11-26 11:47:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 327 flow [2023-11-26 11:47:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2023-11-26 11:47:20,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2023-11-26 11:47:20,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2023-11-26 11:47:20,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2023-11-26 11:47:20,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:20,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2023-11-26 11:47:20,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 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 11:47:20,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 11:47:20,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states 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 11:47:20,804 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 235 flow. Second operand 3 states and 122 transitions. [2023-11-26 11:47:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 327 flow [2023-11-26 11:47:20,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 308 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:20,811 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 185 flow [2023-11-26 11:47:20,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2023-11-26 11:47:20,812 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-11-26 11:47:20,812 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 185 flow [2023-11-26 11:47:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 11:47:20,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:20,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:20,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:47:20,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:20,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash -572432247, now seen corresponding path program 1 times [2023-11-26 11:47:20,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950912143] [2023-11-26 11:47:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:20,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:20,904 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 11:47:20,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950912143] [2023-11-26 11:47:20,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950912143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:20,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:20,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045164420] [2023-11-26 11:47:20,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:20,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:20,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-26 11:47:20,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 11:47:20,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:20,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-26 11:47:20,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:21,187 INFO L124 PetriNetUnfolderBase]: 458/1023 cut-off events. [2023-11-26 11:47:21,188 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-26 11:47:21,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 1023 events. 458/1023 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5490 event pairs, 308 based on Foata normal form. 24/971 useless extension candidates. Maximal degree in co-relation 1961. Up to 626 conditions per place. [2023-11-26 11:47:21,197 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 54 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2023-11-26 11:47:21,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 329 flow [2023-11-26 11:47:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:47:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2023-11-26 11:47:21,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6129032258064516 [2023-11-26 11:47:21,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 152 transitions. [2023-11-26 11:47:21,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 152 transitions. [2023-11-26 11:47:21,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:21,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 152 transitions. [2023-11-26 11:47:21,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 11:47:21,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 11:47:21,202 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states 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 11:47:21,202 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 185 flow. Second operand 4 states and 152 transitions. [2023-11-26 11:47:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 329 flow [2023-11-26 11:47:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 78 transitions, 323 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:21,207 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 197 flow [2023-11-26 11:47:21,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2023-11-26 11:47:21,208 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 13 predicate places. [2023-11-26 11:47:21,209 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 197 flow [2023-11-26 11:47:21,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 11:47:21,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:21,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:21,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:47:21,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:21,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1986709928, now seen corresponding path program 1 times [2023-11-26 11:47:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087157914] [2023-11-26 11:47:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:21,646 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 11:47:21,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:21,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087157914] [2023-11-26 11:47:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087157914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:21,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:21,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:21,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293265814] [2023-11-26 11:47:21,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:21,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:47:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:47:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:21,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 62 [2023-11-26 11:47:21,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 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 11:47:21,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:21,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 62 [2023-11-26 11:47:21,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:22,013 INFO L124 PetriNetUnfolderBase]: 416/981 cut-off events. [2023-11-26 11:47:22,013 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-11-26 11:47:22,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 981 events. 416/981 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5290 event pairs, 129 based on Foata normal form. 12/935 useless extension candidates. Maximal degree in co-relation 1524. Up to 483 conditions per place. [2023-11-26 11:47:22,024 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 56 selfloop transitions, 5 changer transitions 4/88 dead transitions. [2023-11-26 11:47:22,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 379 flow [2023-11-26 11:47:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:47:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2023-11-26 11:47:22,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6096774193548387 [2023-11-26 11:47:22,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 189 transitions. [2023-11-26 11:47:22,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 189 transitions. [2023-11-26 11:47:22,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:22,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 189 transitions. [2023-11-26 11:47:22,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 11:47:22,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 11:47:22,032 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 11:47:22,032 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 197 flow. Second operand 5 states and 189 transitions. [2023-11-26 11:47:22,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 379 flow [2023-11-26 11:47:22,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 88 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:22,038 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 200 flow [2023-11-26 11:47:22,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-11-26 11:47:22,042 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2023-11-26 11:47:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 200 flow [2023-11-26 11:47:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 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 11:47:22,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:22,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:47:22,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:22,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -429872346, now seen corresponding path program 1 times [2023-11-26 11:47:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140237544] [2023-11-26 11:47:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:22,981 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 11:47:22,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140237544] [2023-11-26 11:47:22,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140237544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992053772] [2023-11-26 11:47:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:22,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:22,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:23,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:23,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 11:47:23,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:23,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:47:23,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:47:23,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-26 11:47:23,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-26 11:47:23,626 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 11:47:23,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:23,963 INFO L349 Elim1Store]: treesize reduction 45, result has 53.6 percent of original size [2023-11-26 11:47:23,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 337 [2023-11-26 11:47:24,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:24,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 169 [2023-11-26 11:47:24,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-26 11:47:24,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:24,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 180 [2023-11-26 11:47:24,737 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 11:47:24,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992053772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:24,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:24,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-26 11:47:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070830179] [2023-11-26 11:47:24,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:24,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:47:24,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:47:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:24,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2023-11-26 11:47:24,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 200 flow. Second operand has 18 states, 18 states have (on average 22.27777777777778) internal successors, (401), 18 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 11:47:24,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:24,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2023-11-26 11:47:24,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:25,707 INFO L124 PetriNetUnfolderBase]: 700/1523 cut-off events. [2023-11-26 11:47:25,707 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-26 11:47:25,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 1523 events. 700/1523 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8342 event pairs, 135 based on Foata normal form. 24/1439 useless extension candidates. Maximal degree in co-relation 2562. Up to 229 conditions per place. [2023-11-26 11:47:25,720 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 120 selfloop transitions, 13 changer transitions 4/155 dead transitions. [2023-11-26 11:47:25,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 155 transitions, 688 flow [2023-11-26 11:47:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:47:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-26 11:47:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 399 transitions. [2023-11-26 11:47:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49503722084367247 [2023-11-26 11:47:25,724 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 399 transitions. [2023-11-26 11:47:25,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 399 transitions. [2023-11-26 11:47:25,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:25,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 399 transitions. [2023-11-26 11:47:25,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.692307692307693) internal successors, (399), 13 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 11:47:25,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 11:47:25,728 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 11:47:25,729 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 200 flow. Second operand 13 states and 399 transitions. [2023-11-26 11:47:25,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 155 transitions, 688 flow [2023-11-26 11:47:25,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 155 transitions, 678 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:47:25,736 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 226 flow [2023-11-26 11:47:25,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=226, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-11-26 11:47:25,740 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2023-11-26 11:47:25,740 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 226 flow [2023-11-26 11:47:25,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.27777777777778) internal successors, (401), 18 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 11:47:25,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:25,741 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:25,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:47:25,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:47:25,953 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 24 more)] === [2023-11-26 11:47:25,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash -441140196, now seen corresponding path program 1 times [2023-11-26 11:47:25,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:25,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941749330] [2023-11-26 11:47:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:25,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:26,713 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 11:47:26,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:26,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941749330] [2023-11-26 11:47:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941749330] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770913608] [2023-11-26 11:47:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:26,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:26,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:26,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abde2fca-c53d-4bdb-9f31-758e7711ffb2/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:26,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-26 11:47:26,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:26,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2023-11-26 11:47:26,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2023-11-26 11:47:27,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 44 [2023-11-26 11:47:27,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 51 [2023-11-26 11:47:27,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 47 [2023-11-26 11:47:27,371 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 11:47:27,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:37,099 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 11:47:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770913608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:37,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-26 11:47:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288222233] [2023-11-26 11:47:37,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:37,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:47:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:47:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=252, Unknown=3, NotChecked=0, Total=342 [2023-11-26 11:47:40,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-26 11:47:43,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-26 11:47:47,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-26 11:47:47,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-26 11:47:47,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 226 flow. Second operand has 19 states, 19 states have (on average 21.42105263157895) internal successors, (407), 19 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 11:47:47,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:47,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-26 11:47:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:59,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]