./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/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_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/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_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:45:07,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:45:07,865 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 10:45:07,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:45:07,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:45:07,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:45:07,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:45:07,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:45:07,915 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:45:07,920 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:45:07,920 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:45:07,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:45:07,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:45:07,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:45:07,925 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:45:07,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:45:07,926 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:45:07,926 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:45:07,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:45:07,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:45:07,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:45:07,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:45:07,929 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:45:07,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:45:07,930 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 10:45:07,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:45:07,931 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:45:07,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:45:07,932 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:45:07,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:45:07,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:45:07,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:45:07,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:45:07,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:07,935 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:45:07,935 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:45:07,936 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:45:07,936 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:45:07,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:45:07,937 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:45:07,937 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:45:07,937 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:45:07,938 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:45:07,938 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:45:07,939 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_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-26 10:45:08,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:45:08,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:45:08,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:45:08,272 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:45:08,273 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:45:08,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-26 10:45:11,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:45:11,738 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:45:11,739 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/sv-benchmarks/c/pthread/stack-2.i [2023-11-26 10:45:11,758 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/data/4845fe1ea/0f83d6938a6741ceb7245e758fe11b8f/FLAGc1b711946 [2023-11-26 10:45:11,774 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/data/4845fe1ea/0f83d6938a6741ceb7245e758fe11b8f [2023-11-26 10:45:11,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:45:11,779 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:45:11,780 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:11,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:45:11,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:45:11,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:11" (1/1) ... [2023-11-26 10:45:11,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77054f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:11, skipping insertion in model container [2023-11-26 10:45:11,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:45:11" (1/1) ... [2023-11-26 10:45:11,846 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:45:12,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:12,403 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:45:12,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:45:12,599 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:45:12,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12 WrapperNode [2023-11-26 10:45:12,600 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:45:12,601 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:12,601 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:45:12,602 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:45:12,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,641 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,680 INFO L138 Inliner]: procedures = 278, calls = 47, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 179 [2023-11-26 10:45:12,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:45:12,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:45:12,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:45:12,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:45:12,693 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,698 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,716 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 2, 7, 2]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 0, 5, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2023-11-26 10:45:12,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,732 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,738 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:45:12,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:45:12,740 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:45:12,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:45:12,741 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (1/1) ... [2023-11-26 10:45:12,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:45:12,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:12,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:45:12,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:45:12,826 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 10:45:12,826 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 10:45:12,827 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 10:45:12,827 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 10:45:12,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:45:12,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:45:12,827 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:45:12,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:45:12,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:45:12,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:45:12,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:45:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:45:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:45:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:45:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:45:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:45:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:45:12,832 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:45:12,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:45:12,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:45:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:45:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:45:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:45:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:45:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:45:12,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:45:12,838 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 10:45:13,069 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:45:13,071 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:45:13,436 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:45:13,811 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:45:13,811 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:45:13,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:13 BoogieIcfgContainer [2023-11-26 10:45:13,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:45:13,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:45:13,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:45:13,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:45:13,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:45:11" (1/3) ... [2023-11-26 10:45:13,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6117c690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:13, skipping insertion in model container [2023-11-26 10:45:13,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:45:12" (2/3) ... [2023-11-26 10:45:13,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6117c690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:45:13, skipping insertion in model container [2023-11-26 10:45:13,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:45:13" (3/3) ... [2023-11-26 10:45:13,834 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-26 10:45:13,846 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:45:13,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:45:13,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-26 10:45:13,859 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:45:13,967 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:45:14,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2023-11-26 10:45:14,085 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2023-11-26 10:45:14,085 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:45:14,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-26 10:45:14,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2023-11-26 10:45:14,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 45 transitions, 99 flow [2023-11-26 10:45:14,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:45:14,186 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;@2790e9ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:45:14,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-26 10:45:14,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:45:14,206 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-11-26 10:45:14,206 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:45:14,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:14,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:14,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -934362570, now seen corresponding path program 1 times [2023-11-26 10:45:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303582845] [2023-11-26 10:45:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:14,711 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 10:45:14,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:14,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303582845] [2023-11-26 10:45:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303582845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:14,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:14,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:45:14,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231940035] [2023-11-26 10:45:14,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:14,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 10:45:14,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:14,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:14,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:15,217 INFO L124 PetriNetUnfolderBase]: 737/1456 cut-off events. [2023-11-26 10:45:15,217 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-26 10:45:15,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2696 conditions, 1456 events. 737/1456 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8064 event pairs, 157 based on Foata normal form. 40/1329 useless extension candidates. Maximal degree in co-relation 2472. Up to 804 conditions per place. [2023-11-26 10:45:15,239 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 73 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2023-11-26 10:45:15,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 93 transitions, 362 flow [2023-11-26 10:45:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:45:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2023-11-26 10:45:15,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6693877551020408 [2023-11-26 10:45:15,256 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 164 transitions. [2023-11-26 10:45:15,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 164 transitions. [2023-11-26 10:45:15,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:15,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 164 transitions. [2023-11-26 10:45:15,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 10:45:15,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 10:45:15,272 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 10:45:15,274 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 99 flow. Second operand 5 states and 164 transitions. [2023-11-26 10:45:15,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 93 transitions, 362 flow [2023-11-26 10:45:15,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 93 transitions, 353 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:45:15,285 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 142 flow [2023-11-26 10:45:15,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-26 10:45:15,293 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-26 10:45:15,293 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 142 flow [2023-11-26 10:45:15,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 10:45:15,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:15,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:15,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:45:15,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:15,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:15,295 INFO L85 PathProgramCache]: Analyzing trace with hash 257188861, now seen corresponding path program 1 times [2023-11-26 10:45:15,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:15,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537332015] [2023-11-26 10:45:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:15,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:15,494 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 10:45:15,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:15,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537332015] [2023-11-26 10:45:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537332015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:15,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:15,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113107341] [2023-11-26 10:45:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:15,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:15,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-26 10:45:15,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 10:45:15,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:15,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-26 10:45:15,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:15,850 INFO L124 PetriNetUnfolderBase]: 604/1241 cut-off events. [2023-11-26 10:45:15,851 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-26 10:45:15,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1241 events. 604/1241 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6732 event pairs, 169 based on Foata normal form. 0/1129 useless extension candidates. Maximal degree in co-relation 2386. Up to 631 conditions per place. [2023-11-26 10:45:15,863 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 65 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2023-11-26 10:45:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 366 flow [2023-11-26 10:45:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:45:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:45:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2023-11-26 10:45:15,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2023-11-26 10:45:15,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 163 transitions. [2023-11-26 10:45:15,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 163 transitions. [2023-11-26 10:45:15,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:15,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 163 transitions. [2023-11-26 10:45:15,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 10:45:15,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 10:45:15,871 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 10:45:15,872 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 142 flow. Second operand 5 states and 163 transitions. [2023-11-26 10:45:15,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 366 flow [2023-11-26 10:45:15,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 87 transitions, 362 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 10:45:15,879 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 162 flow [2023-11-26 10:45:15,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-26 10:45:15,881 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-11-26 10:45:15,881 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 162 flow [2023-11-26 10:45:15,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 10:45:15,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:15,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:15,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:45:15,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:15,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -617111179, now seen corresponding path program 1 times [2023-11-26 10:45:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:15,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563201255] [2023-11-26 10:45:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:15,984 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 10:45:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563201255] [2023-11-26 10:45:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563201255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:15,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:15,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:15,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111579990] [2023-11-26 10:45:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:15,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:16,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:16,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 10:45:16,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:16,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:16,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:16,490 INFO L124 PetriNetUnfolderBase]: 1140/2287 cut-off events. [2023-11-26 10:45:16,490 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-11-26 10:45:16,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5002 conditions, 2287 events. 1140/2287 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13373 event pairs, 518 based on Foata normal form. 72/2197 useless extension candidates. Maximal degree in co-relation 4019. Up to 1152 conditions per place. [2023-11-26 10:45:16,512 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 79 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-11-26 10:45:16,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 96 transitions, 480 flow [2023-11-26 10:45:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:45:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2023-11-26 10:45:16,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2023-11-26 10:45:16,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 135 transitions. [2023-11-26 10:45:16,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 135 transitions. [2023-11-26 10:45:16,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:16,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 135 transitions. [2023-11-26 10:45:16,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 10:45:16,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:16,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:16,521 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 162 flow. Second operand 4 states and 135 transitions. [2023-11-26 10:45:16,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 96 transitions, 480 flow [2023-11-26 10:45:16,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 96 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:45:16,533 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 186 flow [2023-11-26 10:45:16,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-26 10:45:16,535 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 14 predicate places. [2023-11-26 10:45:16,536 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 186 flow [2023-11-26 10:45:16,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 10:45:16,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:16,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:16,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:45:16,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:16,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:16,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1115197879, now seen corresponding path program 1 times [2023-11-26 10:45:16,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:16,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651099692] [2023-11-26 10:45:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:16,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:16,704 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 10:45:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:16,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651099692] [2023-11-26 10:45:16,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651099692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:16,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:16,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783909678] [2023-11-26 10:45:16,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:16,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:16,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 10:45:16,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:16,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:16,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:17,239 INFO L124 PetriNetUnfolderBase]: 1401/2628 cut-off events. [2023-11-26 10:45:17,239 INFO L125 PetriNetUnfolderBase]: For 1250/1294 co-relation queries the response was YES. [2023-11-26 10:45:17,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2628 events. 1401/2628 cut-off events. For 1250/1294 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15076 event pairs, 537 based on Foata normal form. 76/2589 useless extension candidates. Maximal degree in co-relation 4950. Up to 1445 conditions per place. [2023-11-26 10:45:17,265 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 78 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-11-26 10:45:17,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 506 flow [2023-11-26 10:45:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:45:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2023-11-26 10:45:17,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2023-11-26 10:45:17,267 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 134 transitions. [2023-11-26 10:45:17,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 134 transitions. [2023-11-26 10:45:17,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:17,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 134 transitions. [2023-11-26 10:45:17,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 10:45:17,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:17,270 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:17,270 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 186 flow. Second operand 4 states and 134 transitions. [2023-11-26 10:45:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 506 flow [2023-11-26 10:45:17,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:45:17,277 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 208 flow [2023-11-26 10:45:17,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-11-26 10:45:17,278 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-11-26 10:45:17,278 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 208 flow [2023-11-26 10:45:17,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 10:45:17,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:17,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:45:17,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:17,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1217159900, now seen corresponding path program 1 times [2023-11-26 10:45:17,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:17,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008702093] [2023-11-26 10:45:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:17,404 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 10:45:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:17,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008702093] [2023-11-26 10:45:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008702093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:17,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940423819] [2023-11-26 10:45:17,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:17,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:45:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:45:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:45:17,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-26 10:45:17,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 10:45:17,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:17,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-26 10:45:17,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:17,695 INFO L124 PetriNetUnfolderBase]: 695/1544 cut-off events. [2023-11-26 10:45:17,695 INFO L125 PetriNetUnfolderBase]: For 840/906 co-relation queries the response was YES. [2023-11-26 10:45:17,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3767 conditions, 1544 events. 695/1544 cut-off events. For 840/906 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8520 event pairs, 189 based on Foata normal form. 68/1562 useless extension candidates. Maximal degree in co-relation 3345. Up to 786 conditions per place. [2023-11-26 10:45:17,713 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 50 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-26 10:45:17,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 369 flow [2023-11-26 10:45:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:45:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:45:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2023-11-26 10:45:17,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-26 10:45:17,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 98 transitions. [2023-11-26 10:45:17,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 98 transitions. [2023-11-26 10:45:17,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:17,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 98 transitions. [2023-11-26 10:45:17,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 10:45:17,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 10:45:17,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 10:45:17,717 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 208 flow. Second operand 3 states and 98 transitions. [2023-11-26 10:45:17,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 369 flow [2023-11-26 10:45:17,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 359 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:17,726 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 194 flow [2023-11-26 10:45:17,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-26 10:45:17,727 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2023-11-26 10:45:17,728 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 194 flow [2023-11-26 10:45:17,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 10:45:17,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:17,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:17,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:45:17,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:17,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:17,730 INFO L85 PathProgramCache]: Analyzing trace with hash -984839171, now seen corresponding path program 1 times [2023-11-26 10:45:17,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:17,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039295384] [2023-11-26 10:45:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:17,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:17,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:17,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039295384] [2023-11-26 10:45:17,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039295384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:17,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422339242] [2023-11-26 10:45:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:17,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:17,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:17,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:45:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:18,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:18,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:18,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422339242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:18,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:18,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-26 10:45:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446966583] [2023-11-26 10:45:18,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:18,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:18,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:18,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:18,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 194 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 10:45:18,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:18,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:18,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:18,671 INFO L124 PetriNetUnfolderBase]: 1128/2392 cut-off events. [2023-11-26 10:45:18,671 INFO L125 PetriNetUnfolderBase]: For 1211/1327 co-relation queries the response was YES. [2023-11-26 10:45:18,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5932 conditions, 2392 events. 1128/2392 cut-off events. For 1211/1327 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 14065 event pairs, 228 based on Foata normal form. 18/2329 useless extension candidates. Maximal degree in co-relation 3454. Up to 892 conditions per place. [2023-11-26 10:45:18,695 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 97 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2023-11-26 10:45:18,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 119 transitions, 649 flow [2023-11-26 10:45:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:45:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2023-11-26 10:45:18,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5889212827988338 [2023-11-26 10:45:18,698 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 202 transitions. [2023-11-26 10:45:18,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 202 transitions. [2023-11-26 10:45:18,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:18,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 202 transitions. [2023-11-26 10:45:18,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.857142857142858) internal successors, (202), 7 states have internal predecessors, (202), 0 states have call successors, (0), 0 states 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 10:45:18,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:45:18,701 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:45:18,701 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 194 flow. Second operand 7 states and 202 transitions. [2023-11-26 10:45:18,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 119 transitions, 649 flow [2023-11-26 10:45:18,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 119 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:45:18,711 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 247 flow [2023-11-26 10:45:18,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2023-11-26 10:45:18,714 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 25 predicate places. [2023-11-26 10:45:18,715 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 247 flow [2023-11-26 10:45:18,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 10:45:18,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:18,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:18,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:18,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:18,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1868332703, now seen corresponding path program 1 times [2023-11-26 10:45:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486784957] [2023-11-26 10:45:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:19,118 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 10:45:19,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:19,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486784957] [2023-11-26 10:45:19,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486784957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:19,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982940052] [2023-11-26 10:45:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:19,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:19,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:19,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-26 10:45:19,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 10:45:19,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:19,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-26 10:45:19,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:19,887 INFO L124 PetriNetUnfolderBase]: 1656/3378 cut-off events. [2023-11-26 10:45:19,889 INFO L125 PetriNetUnfolderBase]: For 2451/2667 co-relation queries the response was YES. [2023-11-26 10:45:19,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8733 conditions, 3378 events. 1656/3378 cut-off events. For 2451/2667 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 20953 event pairs, 298 based on Foata normal form. 28/3389 useless extension candidates. Maximal degree in co-relation 5657. Up to 1431 conditions per place. [2023-11-26 10:45:19,930 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 108 selfloop transitions, 9 changer transitions 0/129 dead transitions. [2023-11-26 10:45:19,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 747 flow [2023-11-26 10:45:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:45:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2023-11-26 10:45:19,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685131195335277 [2023-11-26 10:45:19,933 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 195 transitions. [2023-11-26 10:45:19,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 195 transitions. [2023-11-26 10:45:19,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:19,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 195 transitions. [2023-11-26 10:45:19,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states 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 10:45:19,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:45:19,936 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:45:19,936 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 247 flow. Second operand 7 states and 195 transitions. [2023-11-26 10:45:19,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 747 flow [2023-11-26 10:45:19,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 739 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:19,949 INFO L231 Difference]: Finished difference. Result has 79 places, 63 transitions, 308 flow [2023-11-26 10:45:19,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=308, PETRI_PLACES=79, PETRI_TRANSITIONS=63} [2023-11-26 10:45:19,951 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-11-26 10:45:19,952 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 63 transitions, 308 flow [2023-11-26 10:45:19,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 10:45:19,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:19,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:19,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:45:19,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:19,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:19,954 INFO L85 PathProgramCache]: Analyzing trace with hash 628033035, now seen corresponding path program 1 times [2023-11-26 10:45:19,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:19,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582685165] [2023-11-26 10:45:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:19,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:20,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582685165] [2023-11-26 10:45:20,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582685165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:20,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010447987] [2023-11-26 10:45:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:20,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:20,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:45:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:20,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:20,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:20,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:20,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010447987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:20,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:20,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 10:45:20,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990718081] [2023-11-26 10:45:20,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:20,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:20,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:20,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:20,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 10:45:20,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:20,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:20,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:20,999 INFO L124 PetriNetUnfolderBase]: 1553/3290 cut-off events. [2023-11-26 10:45:20,999 INFO L125 PetriNetUnfolderBase]: For 3229/3407 co-relation queries the response was YES. [2023-11-26 10:45:21,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8667 conditions, 3290 events. 1553/3290 cut-off events. For 3229/3407 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21031 event pairs, 78 based on Foata normal form. 82/3289 useless extension candidates. Maximal degree in co-relation 7230. Up to 1114 conditions per place. [2023-11-26 10:45:21,035 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 141 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2023-11-26 10:45:21,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 162 transitions, 1160 flow [2023-11-26 10:45:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:45:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2023-11-26 10:45:21,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2023-11-26 10:45:21,038 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 192 transitions. [2023-11-26 10:45:21,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 192 transitions. [2023-11-26 10:45:21,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:21,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 192 transitions. [2023-11-26 10:45:21,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 10:45:21,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:45:21,040 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:45:21,040 INFO L175 Difference]: Start difference. First operand has 79 places, 63 transitions, 308 flow. Second operand 6 states and 192 transitions. [2023-11-26 10:45:21,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 162 transitions, 1160 flow [2023-11-26 10:45:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 162 transitions, 1140 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:21,056 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 308 flow [2023-11-26 10:45:21,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2023-11-26 10:45:21,060 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 34 predicate places. [2023-11-26 10:45:21,060 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 308 flow [2023-11-26 10:45:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 10:45:21,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:21,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:21,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:21,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:21,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:21,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:21,277 INFO L85 PathProgramCache]: Analyzing trace with hash -465242723, now seen corresponding path program 1 times [2023-11-26 10:45:21,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:21,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737031623] [2023-11-26 10:45:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:21,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:21,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737031623] [2023-11-26 10:45:21,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737031623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:21,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533625568] [2023-11-26 10:45:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:21,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:21,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:21,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:21,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:45:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:21,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:21,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:21,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:21,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533625568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:21,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:21,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-26 10:45:21,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424093146] [2023-11-26 10:45:21,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:21,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:45:21,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:21,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:45:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:45:21,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:21,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 308 flow. Second operand has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 10:45:21,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:21,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:21,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:22,868 INFO L124 PetriNetUnfolderBase]: 2514/5254 cut-off events. [2023-11-26 10:45:22,868 INFO L125 PetriNetUnfolderBase]: For 6684/6910 co-relation queries the response was YES. [2023-11-26 10:45:22,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14729 conditions, 5254 events. 2514/5254 cut-off events. For 6684/6910 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 33797 event pairs, 514 based on Foata normal form. 90/5315 useless extension candidates. Maximal degree in co-relation 13288. Up to 1407 conditions per place. [2023-11-26 10:45:22,932 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 169 selfloop transitions, 18 changer transitions 0/201 dead transitions. [2023-11-26 10:45:22,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 201 transitions, 1324 flow [2023-11-26 10:45:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:45:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-26 10:45:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 336 transitions. [2023-11-26 10:45:22,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2023-11-26 10:45:22,937 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 336 transitions. [2023-11-26 10:45:22,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 336 transitions. [2023-11-26 10:45:22,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:22,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 336 transitions. [2023-11-26 10:45:22,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 30.545454545454547) internal successors, (336), 11 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:45:22,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 10:45:22,945 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 49.0) internal successors, (588), 12 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 10:45:22,945 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 308 flow. Second operand 11 states and 336 transitions. [2023-11-26 10:45:22,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 201 transitions, 1324 flow [2023-11-26 10:45:22,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 201 transitions, 1276 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:45:22,966 INFO L231 Difference]: Finished difference. Result has 92 places, 73 transitions, 461 flow [2023-11-26 10:45:22,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=461, PETRI_PLACES=92, PETRI_TRANSITIONS=73} [2023-11-26 10:45:22,969 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 45 predicate places. [2023-11-26 10:45:22,969 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 73 transitions, 461 flow [2023-11-26 10:45:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 10:45:22,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:22,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:22,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:23,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:23,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:23,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1534468745, now seen corresponding path program 1 times [2023-11-26 10:45:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:23,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87011341] [2023-11-26 10:45:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:23,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:23,334 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 10:45:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87011341] [2023-11-26 10:45:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87011341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:23,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:23,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:45:23,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325121632] [2023-11-26 10:45:23,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:23,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:23,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:45:23,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-26 10:45:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 73 transitions, 461 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 10:45:23,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:23,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-26 10:45:23,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:24,683 INFO L124 PetriNetUnfolderBase]: 2885/5772 cut-off events. [2023-11-26 10:45:24,683 INFO L125 PetriNetUnfolderBase]: For 8457/8789 co-relation queries the response was YES. [2023-11-26 10:45:24,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16674 conditions, 5772 events. 2885/5772 cut-off events. For 8457/8789 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 36459 event pairs, 684 based on Foata normal form. 42/5787 useless extension candidates. Maximal degree in co-relation 14281. Up to 3409 conditions per place. [2023-11-26 10:45:24,733 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 116 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2023-11-26 10:45:24,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 137 transitions, 965 flow [2023-11-26 10:45:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:45:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:45:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2023-11-26 10:45:24,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-26 10:45:24,735 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 196 transitions. [2023-11-26 10:45:24,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 196 transitions. [2023-11-26 10:45:24,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:24,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 196 transitions. [2023-11-26 10:45:24,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 10:45:24,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:45:24,738 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 49.0) internal successors, (392), 8 states have internal predecessors, (392), 0 states have call successors, (0), 0 states 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 10:45:24,738 INFO L175 Difference]: Start difference. First operand has 92 places, 73 transitions, 461 flow. Second operand 7 states and 196 transitions. [2023-11-26 10:45:24,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 137 transitions, 965 flow [2023-11-26 10:45:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 951 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:24,761 INFO L231 Difference]: Finished difference. Result has 99 places, 78 transitions, 524 flow [2023-11-26 10:45:24,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2023-11-26 10:45:24,762 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-26 10:45:24,762 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 524 flow [2023-11-26 10:45:24,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 10:45:24,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:24,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:45:24,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:24,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2005811863, now seen corresponding path program 1 times [2023-11-26 10:45:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:24,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712290597] [2023-11-26 10:45:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:24,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:24,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:24,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712290597] [2023-11-26 10:45:24,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712290597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:24,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:24,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:24,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618222263] [2023-11-26 10:45:24,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:24,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:24,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:24,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:24,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:24,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 10:45:24,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 10:45:24,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:24,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 10:45:24,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:25,944 INFO L124 PetriNetUnfolderBase]: 2959/6098 cut-off events. [2023-11-26 10:45:25,945 INFO L125 PetriNetUnfolderBase]: For 9839/10073 co-relation queries the response was YES. [2023-11-26 10:45:25,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17546 conditions, 6098 events. 2959/6098 cut-off events. For 9839/10073 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 40408 event pairs, 507 based on Foata normal form. 146/6243 useless extension candidates. Maximal degree in co-relation 15660. Up to 2960 conditions per place. [2023-11-26 10:45:26,000 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 120 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-11-26 10:45:26,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 142 transitions, 1274 flow [2023-11-26 10:45:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:45:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-26 10:45:26,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-26 10:45:26,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-26 10:45:26,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-26 10:45:26,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:26,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-26 10:45:26,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 10:45:26,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:26,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:26,004 INFO L175 Difference]: Start difference. First operand has 99 places, 78 transitions, 524 flow. Second operand 4 states and 120 transitions. [2023-11-26 10:45:26,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 142 transitions, 1274 flow [2023-11-26 10:45:26,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 142 transitions, 1252 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-26 10:45:26,042 INFO L231 Difference]: Finished difference. Result has 99 places, 78 transitions, 528 flow [2023-11-26 10:45:26,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=528, PETRI_PLACES=99, PETRI_TRANSITIONS=78} [2023-11-26 10:45:26,044 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-26 10:45:26,044 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 78 transitions, 528 flow [2023-11-26 10:45:26,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 10:45:26,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:26,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:26,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:45:26,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:26,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1470912286, now seen corresponding path program 1 times [2023-11-26 10:45:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:26,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504344074] [2023-11-26 10:45:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:26,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:26,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:26,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504344074] [2023-11-26 10:45:26,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504344074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:26,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092587805] [2023-11-26 10:45:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:26,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:26,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:26,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:45:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:26,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 10:45:26,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:26,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:26,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092587805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:26,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:26,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 10:45:26,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067229102] [2023-11-26 10:45:26,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:26,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:45:26,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:45:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 10:45:26,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:26,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 78 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 10:45:26,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:26,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:26,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:27,881 INFO L124 PetriNetUnfolderBase]: 2948/5905 cut-off events. [2023-11-26 10:45:27,881 INFO L125 PetriNetUnfolderBase]: For 11218/11236 co-relation queries the response was YES. [2023-11-26 10:45:27,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 5905 events. 2948/5905 cut-off events. For 11218/11236 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 38150 event pairs, 349 based on Foata normal form. 178/5902 useless extension candidates. Maximal degree in co-relation 17118. Up to 3416 conditions per place. [2023-11-26 10:45:27,955 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 131 selfloop transitions, 5 changer transitions 0/152 dead transitions. [2023-11-26 10:45:27,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 152 transitions, 1216 flow [2023-11-26 10:45:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:45:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:45:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2023-11-26 10:45:27,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-26 10:45:27,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 189 transitions. [2023-11-26 10:45:27,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 189 transitions. [2023-11-26 10:45:27,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:27,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 189 transitions. [2023-11-26 10:45:27,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.5) internal successors, (189), 6 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 10:45:27,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:45:27,962 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states 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 10:45:27,962 INFO L175 Difference]: Start difference. First operand has 99 places, 78 transitions, 528 flow. Second operand 6 states and 189 transitions. [2023-11-26 10:45:27,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 152 transitions, 1216 flow [2023-11-26 10:45:27,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 152 transitions, 1180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:27,998 INFO L231 Difference]: Finished difference. Result has 101 places, 77 transitions, 526 flow [2023-11-26 10:45:27,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=101, PETRI_TRANSITIONS=77} [2023-11-26 10:45:28,000 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 54 predicate places. [2023-11-26 10:45:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 77 transitions, 526 flow [2023-11-26 10:45:28,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 10:45:28,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-26 10:45:28,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:28,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:28,214 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:28,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1646359902, now seen corresponding path program 1 times [2023-11-26 10:45:28,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:28,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548421875] [2023-11-26 10:45:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:28,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:28,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:28,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548421875] [2023-11-26 10:45:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548421875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:28,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:45:28,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:45:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858822801] [2023-11-26 10:45:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:28,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:28,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:45:28,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-26 10:45:28,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 77 transitions, 526 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 10:45:28,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:28,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-26 10:45:28,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:29,414 INFO L124 PetriNetUnfolderBase]: 3065/6051 cut-off events. [2023-11-26 10:45:29,414 INFO L125 PetriNetUnfolderBase]: For 10593/10593 co-relation queries the response was YES. [2023-11-26 10:45:29,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18398 conditions, 6051 events. 3065/6051 cut-off events. For 10593/10593 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 38314 event pairs, 765 based on Foata normal form. 178/6198 useless extension candidates. Maximal degree in co-relation 15344. Up to 2729 conditions per place. [2023-11-26 10:45:29,485 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 108 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-11-26 10:45:29,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 129 transitions, 1092 flow [2023-11-26 10:45:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:45:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2023-11-26 10:45:29,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2023-11-26 10:45:29,487 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 120 transitions. [2023-11-26 10:45:29,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 120 transitions. [2023-11-26 10:45:29,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:29,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 120 transitions. [2023-11-26 10:45:29,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 10:45:29,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:29,490 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:29,490 INFO L175 Difference]: Start difference. First operand has 101 places, 77 transitions, 526 flow. Second operand 4 states and 120 transitions. [2023-11-26 10:45:29,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 129 transitions, 1092 flow [2023-11-26 10:45:29,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 1083 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-26 10:45:29,545 INFO L231 Difference]: Finished difference. Result has 100 places, 77 transitions, 533 flow [2023-11-26 10:45:29,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=533, PETRI_PLACES=100, PETRI_TRANSITIONS=77} [2023-11-26 10:45:29,547 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 53 predicate places. [2023-11-26 10:45:29,547 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 77 transitions, 533 flow [2023-11-26 10:45:29,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 10:45:29,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:29,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:29,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-26 10:45:29,549 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:29,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash 718444905, now seen corresponding path program 1 times [2023-11-26 10:45:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:29,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740403089] [2023-11-26 10:45:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740403089] [2023-11-26 10:45:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740403089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591059026] [2023-11-26 10:45:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:29,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:29,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:29,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:29,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:45:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:29,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:45:29,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:30,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:30,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591059026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:30,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:30,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-11-26 10:45:30,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681516466] [2023-11-26 10:45:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:45:30,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:45:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:30,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:30,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 77 transitions, 533 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 10:45:30,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:30,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:30,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:31,071 INFO L124 PetriNetUnfolderBase]: 2712/5512 cut-off events. [2023-11-26 10:45:31,071 INFO L125 PetriNetUnfolderBase]: For 11169/11169 co-relation queries the response was YES. [2023-11-26 10:45:31,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17326 conditions, 5512 events. 2712/5512 cut-off events. For 11169/11169 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 35497 event pairs, 2030 based on Foata normal form. 24/5487 useless extension candidates. Maximal degree in co-relation 15446. Up to 4187 conditions per place. [2023-11-26 10:45:31,132 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 56 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2023-11-26 10:45:31,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 708 flow [2023-11-26 10:45:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:45:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:45:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2023-11-26 10:45:31,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2023-11-26 10:45:31,134 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 102 transitions. [2023-11-26 10:45:31,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 102 transitions. [2023-11-26 10:45:31,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:31,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 102 transitions. [2023-11-26 10:45:31,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 10:45:31,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:31,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states 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 10:45:31,137 INFO L175 Difference]: Start difference. First operand has 100 places, 77 transitions, 533 flow. Second operand 4 states and 102 transitions. [2023-11-26 10:45:31,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 708 flow [2023-11-26 10:45:31,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 85 transitions, 698 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-26 10:45:31,272 INFO L231 Difference]: Finished difference. Result has 99 places, 76 transitions, 545 flow [2023-11-26 10:45:31,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=545, PETRI_PLACES=99, PETRI_TRANSITIONS=76} [2023-11-26 10:45:31,273 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-26 10:45:31,273 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 76 transitions, 545 flow [2023-11-26 10:45:31,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 10:45:31,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:31,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:31,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:31,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:31,481 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:31,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:31,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1887080790, now seen corresponding path program 1 times [2023-11-26 10:45:31,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:31,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441044257] [2023-11-26 10:45:31,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:31,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:31,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441044257] [2023-11-26 10:45:31,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441044257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:31,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267219794] [2023-11-26 10:45:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:31,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:31,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:45:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:31,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:45:31,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:31,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:45:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267219794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:45:31,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:45:31,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-11-26 10:45:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670025739] [2023-11-26 10:45:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:45:31,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 10:45:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 10:45:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:45:31,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-26 10:45:31,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 76 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 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 10:45:31,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:31,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-26 10:45:31,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:33,323 INFO L124 PetriNetUnfolderBase]: 3321/6442 cut-off events. [2023-11-26 10:45:33,323 INFO L125 PetriNetUnfolderBase]: For 12984/12984 co-relation queries the response was YES. [2023-11-26 10:45:33,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20196 conditions, 6442 events. 3321/6442 cut-off events. For 12984/12984 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 40378 event pairs, 612 based on Foata normal form. 70/6479 useless extension candidates. Maximal degree in co-relation 17154. Up to 2613 conditions per place. [2023-11-26 10:45:33,379 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 161 selfloop transitions, 30 changer transitions 0/201 dead transitions. [2023-11-26 10:45:33,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 201 transitions, 1504 flow [2023-11-26 10:45:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:45:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:45:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2023-11-26 10:45:33,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340136054421769 [2023-11-26 10:45:33,383 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 314 transitions. [2023-11-26 10:45:33,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 314 transitions. [2023-11-26 10:45:33,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:33,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 314 transitions. [2023-11-26 10:45:33,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.166666666666668) internal successors, (314), 12 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 10:45:33,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 0 states have call successors, (0), 0 states 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 10:45:33,388 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 49.0) internal successors, (637), 13 states have internal predecessors, (637), 0 states have call successors, (0), 0 states 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 10:45:33,388 INFO L175 Difference]: Start difference. First operand has 99 places, 76 transitions, 545 flow. Second operand 12 states and 314 transitions. [2023-11-26 10:45:33,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 201 transitions, 1504 flow [2023-11-26 10:45:33,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 201 transitions, 1464 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-26 10:45:33,434 INFO L231 Difference]: Finished difference. Result has 110 places, 88 transitions, 716 flow [2023-11-26 10:45:33,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=716, PETRI_PLACES=110, PETRI_TRANSITIONS=88} [2023-11-26 10:45:33,435 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 63 predicate places. [2023-11-26 10:45:33,436 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 88 transitions, 716 flow [2023-11-26 10:45:33,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 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 10:45:33,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:33,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:33,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-26 10:45:33,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:33,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1763194204, now seen corresponding path program 1 times [2023-11-26 10:45:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825214518] [2023-11-26 10:45:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:33,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825214518] [2023-11-26 10:45:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825214518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:33,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124335158] [2023-11-26 10:45:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:33,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:33,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:45:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:34,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:45:34,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:34,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:45:34,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124335158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:34,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:34,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-26 10:45:34,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135621504] [2023-11-26 10:45:34,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:34,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:45:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:34,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:45:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:45:34,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 10:45:34,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 88 transitions, 716 flow. Second operand has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 10:45:34,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:34,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 10:45:34,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:36,732 INFO L124 PetriNetUnfolderBase]: 4968/9470 cut-off events. [2023-11-26 10:45:36,732 INFO L125 PetriNetUnfolderBase]: For 20127/20127 co-relation queries the response was YES. [2023-11-26 10:45:36,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30166 conditions, 9470 events. 4968/9470 cut-off events. For 20127/20127 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 61623 event pairs, 728 based on Foata normal form. 80/9519 useless extension candidates. Maximal degree in co-relation 26818. Up to 3638 conditions per place. [2023-11-26 10:45:36,829 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 254 selfloop transitions, 67 changer transitions 0/330 dead transitions. [2023-11-26 10:45:36,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 330 transitions, 2563 flow [2023-11-26 10:45:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 10:45:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 10:45:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 557 transitions. [2023-11-26 10:45:36,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736394557823129 [2023-11-26 10:45:36,836 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 557 transitions. [2023-11-26 10:45:36,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 557 transitions. [2023-11-26 10:45:36,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:36,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 557 transitions. [2023-11-26 10:45:36,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 23.208333333333332) internal successors, (557), 24 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 10:45:36,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 10:45:36,845 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 10:45:36,846 INFO L175 Difference]: Start difference. First operand has 110 places, 88 transitions, 716 flow. Second operand 24 states and 557 transitions. [2023-11-26 10:45:36,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 330 transitions, 2563 flow [2023-11-26 10:45:36,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 330 transitions, 2509 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-26 10:45:36,926 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1236 flow [2023-11-26 10:45:36,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1236, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2023-11-26 10:45:36,927 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 88 predicate places. [2023-11-26 10:45:36,928 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1236 flow [2023-11-26 10:45:36,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 14 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 10:45:36,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:36,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:36,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:37,141 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:37,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1630037124, now seen corresponding path program 1 times [2023-11-26 10:45:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:37,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239928241] [2023-11-26 10:45:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:37,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239928241] [2023-11-26 10:45:37,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239928241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:37,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439661765] [2023-11-26 10:45:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:37,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:37,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:45:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:37,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 10:45:37,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:37,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439661765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:37,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:37,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-26 10:45:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668201634] [2023-11-26 10:45:37,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:37,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 10:45:37,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:37,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 10:45:37,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-26 10:45:37,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-26 10:45:37,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1236 flow. Second operand has 16 states, 16 states have (on average 17.625) internal successors, (282), 16 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 10:45:37,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:37,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-26 10:45:37,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:40,145 INFO L124 PetriNetUnfolderBase]: 6149/12080 cut-off events. [2023-11-26 10:45:40,145 INFO L125 PetriNetUnfolderBase]: For 35469/35469 co-relation queries the response was YES. [2023-11-26 10:45:40,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38406 conditions, 12080 events. 6149/12080 cut-off events. For 35469/35469 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 82965 event pairs, 1408 based on Foata normal form. 462/12503 useless extension candidates. Maximal degree in co-relation 35298. Up to 3236 conditions per place. [2023-11-26 10:45:40,483 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 200 selfloop transitions, 104 changer transitions 0/315 dead transitions. [2023-11-26 10:45:40,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 315 transitions, 2808 flow [2023-11-26 10:45:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 10:45:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-26 10:45:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 436 transitions. [2023-11-26 10:45:40,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234093637454982 [2023-11-26 10:45:40,490 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 436 transitions. [2023-11-26 10:45:40,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 436 transitions. [2023-11-26 10:45:40,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:40,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 436 transitions. [2023-11-26 10:45:40,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 25.647058823529413) internal successors, (436), 17 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 10:45:40,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 10:45:40,506 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states 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 10:45:40,506 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1236 flow. Second operand 17 states and 436 transitions. [2023-11-26 10:45:40,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 315 transitions, 2808 flow [2023-11-26 10:45:40,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 315 transitions, 2559 flow, removed 110 selfloop flow, removed 5 redundant places. [2023-11-26 10:45:40,658 INFO L231 Difference]: Finished difference. Result has 141 places, 154 transitions, 1557 flow [2023-11-26 10:45:40,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1557, PETRI_PLACES=141, PETRI_TRANSITIONS=154} [2023-11-26 10:45:40,660 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 94 predicate places. [2023-11-26 10:45:40,660 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 154 transitions, 1557 flow [2023-11-26 10:45:40,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.625) internal successors, (282), 16 states have internal predecessors, (282), 0 states have call successors, (0), 0 states 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 10:45:40,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:40,661 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-26 10:45:40,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:40,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:40,868 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:40,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 155585348, now seen corresponding path program 2 times [2023-11-26 10:45:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:40,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671731085] [2023-11-26 10:45:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:40,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:41,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:41,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671731085] [2023-11-26 10:45:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671731085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677722360] [2023-11-26 10:45:41,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:41,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:41,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:41,499 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:41,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 10:45:41,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:41,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:41,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:45:41,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:41,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:42,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677722360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:42,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:42,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-26 10:45:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997033281] [2023-11-26 10:45:42,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:42,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:45:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:45:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:45:42,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-26 10:45:42,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 154 transitions, 1557 flow. Second operand has 24 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 10:45:42,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:42,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-26 10:45:42,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:46,221 INFO L124 PetriNetUnfolderBase]: 8834/17366 cut-off events. [2023-11-26 10:45:46,221 INFO L125 PetriNetUnfolderBase]: For 51976/51976 co-relation queries the response was YES. [2023-11-26 10:45:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56752 conditions, 17366 events. 8834/17366 cut-off events. For 51976/51976 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 119566 event pairs, 2688 based on Foata normal form. 144/17441 useless extension candidates. Maximal degree in co-relation 51621. Up to 7569 conditions per place. [2023-11-26 10:45:46,369 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 436 selfloop transitions, 49 changer transitions 0/499 dead transitions. [2023-11-26 10:45:46,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 499 transitions, 4310 flow [2023-11-26 10:45:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 10:45:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 10:45:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 706 transitions. [2023-11-26 10:45:46,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549165120593692 [2023-11-26 10:45:46,372 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 706 transitions. [2023-11-26 10:45:46,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 706 transitions. [2023-11-26 10:45:46,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:46,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 706 transitions. [2023-11-26 10:45:46,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 32.09090909090909) internal successors, (706), 22 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 10:45:46,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states 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 10:45:46,380 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states 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 10:45:46,380 INFO L175 Difference]: Start difference. First operand has 141 places, 154 transitions, 1557 flow. Second operand 22 states and 706 transitions. [2023-11-26 10:45:46,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 499 transitions, 4310 flow [2023-11-26 10:45:46,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 499 transitions, 4120 flow, removed 83 selfloop flow, removed 4 redundant places. [2023-11-26 10:45:46,540 INFO L231 Difference]: Finished difference. Result has 164 places, 180 transitions, 1942 flow [2023-11-26 10:45:46,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1942, PETRI_PLACES=164, PETRI_TRANSITIONS=180} [2023-11-26 10:45:46,542 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 117 predicate places. [2023-11-26 10:45:46,542 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 180 transitions, 1942 flow [2023-11-26 10:45:46,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.541666666666668) internal successors, (469), 24 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 10:45:46,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:46,543 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:46,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-26 10:45:46,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-26 10:45:46,749 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:46,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 225901083, now seen corresponding path program 1 times [2023-11-26 10:45:46,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:46,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999942012] [2023-11-26 10:45:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 10:45:47,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:47,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999942012] [2023-11-26 10:45:47,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999942012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:47,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733272218] [2023-11-26 10:45:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:47,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:47,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:47,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 10:45:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:47,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:45:47,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:45:47,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-26 10:45:47,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733272218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:47,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:47,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-11-26 10:45:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415408246] [2023-11-26 10:45:47,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 10:45:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 10:45:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:45:47,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-26 10:45:47,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 180 transitions, 1942 flow. Second operand has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 10:45:47,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:47,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-26 10:45:47,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:45:54,281 INFO L124 PetriNetUnfolderBase]: 13698/26822 cut-off events. [2023-11-26 10:45:54,281 INFO L125 PetriNetUnfolderBase]: For 70564/70564 co-relation queries the response was YES. [2023-11-26 10:45:54,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85707 conditions, 26822 events. 13698/26822 cut-off events. For 70564/70564 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 201176 event pairs, 2183 based on Foata normal form. 192/26932 useless extension candidates. Maximal degree in co-relation 82351. Up to 5837 conditions per place. [2023-11-26 10:45:54,540 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 365 selfloop transitions, 192 changer transitions 0/568 dead transitions. [2023-11-26 10:45:54,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 568 transitions, 5346 flow [2023-11-26 10:45:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-26 10:45:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-26 10:45:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 676 transitions. [2023-11-26 10:45:54,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2023-11-26 10:45:54,544 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 676 transitions. [2023-11-26 10:45:54,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 676 transitions. [2023-11-26 10:45:54,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:45:54,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 676 transitions. [2023-11-26 10:45:54,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 26.0) internal successors, (676), 26 states have internal predecessors, (676), 0 states have call successors, (0), 0 states 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 10:45:54,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states 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 10:45:54,550 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states 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 10:45:54,550 INFO L175 Difference]: Start difference. First operand has 164 places, 180 transitions, 1942 flow. Second operand 26 states and 676 transitions. [2023-11-26 10:45:54,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 568 transitions, 5346 flow [2023-11-26 10:45:54,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 568 transitions, 5249 flow, removed 25 selfloop flow, removed 6 redundant places. [2023-11-26 10:45:54,821 INFO L231 Difference]: Finished difference. Result has 193 places, 293 transitions, 3773 flow [2023-11-26 10:45:54,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3773, PETRI_PLACES=193, PETRI_TRANSITIONS=293} [2023-11-26 10:45:54,822 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 146 predicate places. [2023-11-26 10:45:54,823 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 293 transitions, 3773 flow [2023-11-26 10:45:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.11111111111111) internal successors, (326), 18 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 10:45:54,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:45:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:45:54,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 10:45:55,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:55,032 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-26 10:45:55,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:45:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1253337083, now seen corresponding path program 2 times [2023-11-26 10:45:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:45:55,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069425816] [2023-11-26 10:45:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:45:55,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:45:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:45:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:55,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:45:55,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069425816] [2023-11-26 10:45:55,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069425816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:45:55,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688362977] [2023-11-26 10:45:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:45:55,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:45:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:45:55,587 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:45:55,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9ab49c-1a42-483a-8b33-2dcfa01f0c66/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 10:45:55,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:45:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:45:55,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:45:55,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:45:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:55,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:45:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:45:56,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688362977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:45:56,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:45:56,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-26 10:45:56,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447691042] [2023-11-26 10:45:56,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:45:56,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-26 10:45:56,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:45:56,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-26 10:45:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-26 10:45:56,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-26 10:45:56,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 293 transitions, 3773 flow. Second operand has 26 states, 26 states have (on average 17.384615384615383) internal successors, (452), 26 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 10:45:56,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:45:56,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-26 10:45:56,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand