./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/fib_safe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:04,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:04,892 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:48:04,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:04,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:04,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:04,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:04,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:04,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:04,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:04,926 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:04,927 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:04,927 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:04,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:04,929 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:48:04,929 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:04,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:04,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:04,931 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:04,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:48:04,932 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:04,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:48:04,941 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:48:04,941 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:48:04,942 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:04,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:48:04,943 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:04,943 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:04,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:04,944 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:04,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:04,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:04,945 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:04,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:48:04,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:04,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:04,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:04,948 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:48:04,948 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:04,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:04,949 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:04,950 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_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ab3b79be699544cc101a76da66f98a1e0e6116d5865ddc6f998abd49388964 [2023-11-19 07:48:05,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:05,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:05,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:05,289 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:05,290 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:05,292 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/fib_safe-11.i [2023-11-19 07:48:08,512 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:08,829 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:08,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/sv-benchmarks/c/pthread/fib_safe-11.i [2023-11-19 07:48:08,849 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/data/cec1f35a7/15bade8b14334767804e4ba4b48f6969/FLAGf198070d2 [2023-11-19 07:48:08,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/data/cec1f35a7/15bade8b14334767804e4ba4b48f6969 [2023-11-19 07:48:08,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:08,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:08,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:08,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:08,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:08,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:08" (1/1) ... [2023-11-19 07:48:08,886 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121f3f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:08, skipping insertion in model container [2023-11-19 07:48:08,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:08" (1/1) ... [2023-11-19 07:48:08,958 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:09,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:09,308 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:09,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:09,380 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:48:09,380 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:48:09,389 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:09,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09 WrapperNode [2023-11-19 07:48:09,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:09,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:09,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:09,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:09,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,413 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,437 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 82 [2023-11-19 07:48:09,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:09,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:09,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:09,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:09,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,452 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,463 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:09,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:09,472 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:09,472 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:09,473 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (1/1) ... [2023-11-19 07:48:09,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:09,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:09,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:09,549 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:48:09,550 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:48:09,550 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:48:09,550 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:48:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:48:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:48:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:09,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:48:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:48:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:48:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:09,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:09,555 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:48:09,695 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:09,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:09,994 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:10,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:10,040 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:48:10,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:10 BoogieIcfgContainer [2023-11-19 07:48:10,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:10,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:10,047 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:10,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:10,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:08" (1/3) ... [2023-11-19 07:48:10,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2116dd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:10, skipping insertion in model container [2023-11-19 07:48:10,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:09" (2/3) ... [2023-11-19 07:48:10,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2116dd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:10, skipping insertion in model container [2023-11-19 07:48:10,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:10" (3/3) ... [2023-11-19 07:48:10,054 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-11.i [2023-11-19 07:48:10,062 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:48:10,071 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:10,071 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-19 07:48:10,071 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:48:10,142 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:48:10,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 121 transitions, 250 flow [2023-11-19 07:48:10,246 INFO L124 PetriNetUnfolderBase]: 8/119 cut-off events. [2023-11-19 07:48:10,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:10,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 119 events. 8/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 167 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-11-19 07:48:10,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 121 transitions, 250 flow [2023-11-19 07:48:10,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 119 transitions, 244 flow [2023-11-19 07:48:10,263 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:10,275 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 119 transitions, 244 flow [2023-11-19 07:48:10,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 119 transitions, 244 flow [2023-11-19 07:48:10,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 119 transitions, 244 flow [2023-11-19 07:48:10,318 INFO L124 PetriNetUnfolderBase]: 8/119 cut-off events. [2023-11-19 07:48:10,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:10,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 119 events. 8/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 169 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 94. Up to 2 conditions per place. [2023-11-19 07:48:10,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 4318 [2023-11-19 07:48:14,563 INFO L134 LiptonReduction]: Checked pairs total: 3754 [2023-11-19 07:48:14,563 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-11-19 07:48:14,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:14,605 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;@6d529bf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:14,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-19 07:48:14,608 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:48:14,609 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-19 07:48:14,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:14,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:14,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:48:14,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:14,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 14719801, now seen corresponding path program 1 times [2023-11-19 07:48:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42147357] [2023-11-19 07:48:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:14,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42147357] [2023-11-19 07:48:14,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42147357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:14,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:14,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:48:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328150951] [2023-11-19 07:48:14,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:14,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:15,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 244 [2023-11-19 07:48:15,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:15,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 244 [2023-11-19 07:48:15,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:15,238 INFO L124 PetriNetUnfolderBase]: 583/864 cut-off events. [2023-11-19 07:48:15,238 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:48:15,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 864 events. 583/864 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3533 event pairs, 92 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 1740. Up to 727 conditions per place. [2023-11-19 07:48:15,249 INFO L140 encePairwiseOnDemand]: 232/244 looper letters, 33 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2023-11-19 07:48:15,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 161 flow [2023-11-19 07:48:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-11-19 07:48:15,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959016393442623 [2023-11-19 07:48:15,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-11-19 07:48:15,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-11-19 07:48:15,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:15,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-11-19 07:48:15,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,290 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 56 flow. Second operand 3 states and 363 transitions. [2023-11-19 07:48:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 161 flow [2023-11-19 07:48:15,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:15,295 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 87 flow [2023-11-19 07:48:15,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-19 07:48:15,305 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-19 07:48:15,305 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 87 flow [2023-11-19 07:48:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:15,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:48:15,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:48:15,306 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:15,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 456315909, now seen corresponding path program 1 times [2023-11-19 07:48:15,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124900323] [2023-11-19 07:48:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:15,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:15,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124900323] [2023-11-19 07:48:15,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124900323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:15,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:15,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:15,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083258098] [2023-11-19 07:48:15,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:15,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:15,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:15,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:15,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:15,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 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) [2023-11-19 07:48:15,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:15,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:15,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:15,554 INFO L124 PetriNetUnfolderBase]: 489/732 cut-off events. [2023-11-19 07:48:15,554 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-19 07:48:15,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1831 conditions, 732 events. 489/732 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2783 event pairs, 317 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 1820. Up to 732 conditions per place. [2023-11-19 07:48:15,563 INFO L140 encePairwiseOnDemand]: 242/244 looper letters, 23 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-11-19 07:48:15,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 126 flow [2023-11-19 07:48:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-11-19 07:48:15,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4521857923497268 [2023-11-19 07:48:15,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-11-19 07:48:15,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-11-19 07:48:15,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:15,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-11-19 07:48:15,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,581 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:15,581 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 87 flow. Second operand 3 states and 331 transitions. [2023-11-19 07:48:15,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 126 flow [2023-11-19 07:48:15,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 122 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:15,585 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 76 flow [2023-11-19 07:48:15,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-11-19 07:48:15,587 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-19 07:48:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 76 flow [2023-11-19 07:48:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 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) [2023-11-19 07:48:15,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:15,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:48:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:48:15,593 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:15,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 456315855, now seen corresponding path program 1 times [2023-11-19 07:48:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:15,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961327453] [2023-11-19 07:48:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:15,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961327453] [2023-11-19 07:48:15,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961327453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:15,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449882234] [2023-11-19 07:48:15,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:15,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:15,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:15,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:48:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:48:15,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:15,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:15,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449882234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:15,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:15,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:48:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229274773] [2023-11-19 07:48:15,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:15,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:48:15,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:48:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:16,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:16,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:16,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:16,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:16,385 INFO L124 PetriNetUnfolderBase]: 1089/1636 cut-off events. [2023-11-19 07:48:16,385 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-19 07:48:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3972 conditions, 1636 events. 1089/1636 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7614 event pairs, 92 based on Foata normal form. 0/892 useless extension candidates. Maximal degree in co-relation 3964. Up to 663 conditions per place. [2023-11-19 07:48:16,400 INFO L140 encePairwiseOnDemand]: 236/244 looper letters, 82 selfloop transitions, 20 changer transitions 0/102 dead transitions. [2023-11-19 07:48:16,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 102 transitions, 486 flow [2023-11-19 07:48:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:48:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 831 transitions. [2023-11-19 07:48:16,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48653395784543324 [2023-11-19 07:48:16,405 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 831 transitions. [2023-11-19 07:48:16,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 831 transitions. [2023-11-19 07:48:16,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:16,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 831 transitions. [2023-11-19 07:48:16,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 118.71428571428571) internal successors, (831), 7 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 244.0) internal successors, (1952), 8 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,414 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 244.0) internal successors, (1952), 8 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,414 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 76 flow. Second operand 7 states and 831 transitions. [2023-11-19 07:48:16,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 102 transitions, 486 flow [2023-11-19 07:48:16,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 102 transitions, 485 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:16,418 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 245 flow [2023-11-19 07:48:16,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2023-11-19 07:48:16,421 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-19 07:48:16,421 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 245 flow [2023-11-19 07:48:16,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:16,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:48:16,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:16,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:16,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:16,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash 456315854, now seen corresponding path program 1 times [2023-11-19 07:48:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901687269] [2023-11-19 07:48:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:16,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:16,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901687269] [2023-11-19 07:48:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901687269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903110708] [2023-11-19 07:48:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:16,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:16,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:16,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:16,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:48:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:48:16,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:16,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:16,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903110708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:16,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:16,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-19 07:48:16,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661239598] [2023-11-19 07:48:16,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:16,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:16,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 244 [2023-11-19 07:48:16,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:16,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:16,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 244 [2023-11-19 07:48:16,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:17,122 INFO L124 PetriNetUnfolderBase]: 895/1334 cut-off events. [2023-11-19 07:48:17,122 INFO L125 PetriNetUnfolderBase]: For 1241/1241 co-relation queries the response was YES. [2023-11-19 07:48:17,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1334 events. 895/1334 cut-off events. For 1241/1241 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5851 event pairs, 301 based on Foata normal form. 236/1180 useless extension candidates. Maximal degree in co-relation 4150. Up to 690 conditions per place. [2023-11-19 07:48:17,136 INFO L140 encePairwiseOnDemand]: 238/244 looper letters, 38 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2023-11-19 07:48:17,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 363 flow [2023-11-19 07:48:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:48:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-11-19 07:48:17,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661885245901639 [2023-11-19 07:48:17,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-11-19 07:48:17,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-11-19 07:48:17,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:17,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-11-19 07:48:17,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,146 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 245 flow. Second operand 4 states and 455 transitions. [2023-11-19 07:48:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 363 flow [2023-11-19 07:48:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 319 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-11-19 07:48:17,163 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 234 flow [2023-11-19 07:48:17,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2023-11-19 07:48:17,164 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-11-19 07:48:17,165 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 234 flow [2023-11-19 07:48:17,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:17,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:48:17,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:17,380 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1262758087, now seen corresponding path program 1 times [2023-11-19 07:48:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93989399] [2023-11-19 07:48:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93989399] [2023-11-19 07:48:17,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93989399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:17,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:17,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740431948] [2023-11-19 07:48:17,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:17,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:17,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:17,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:17,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:17,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:17,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:17,770 INFO L124 PetriNetUnfolderBase]: 1330/1976 cut-off events. [2023-11-19 07:48:17,770 INFO L125 PetriNetUnfolderBase]: For 3120/3120 co-relation queries the response was YES. [2023-11-19 07:48:17,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6439 conditions, 1976 events. 1330/1976 cut-off events. For 3120/3120 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 9249 event pairs, 366 based on Foata normal form. 0/1391 useless extension candidates. Maximal degree in co-relation 6424. Up to 1140 conditions per place. [2023-11-19 07:48:17,791 INFO L140 encePairwiseOnDemand]: 240/244 looper letters, 65 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-11-19 07:48:17,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 67 transitions, 577 flow [2023-11-19 07:48:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-11-19 07:48:17,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672131147540984 [2023-11-19 07:48:17,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-11-19 07:48:17,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-11-19 07:48:17,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:17,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-11-19 07:48:17,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,800 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 234 flow. Second operand 3 states and 342 transitions. [2023-11-19 07:48:17,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 67 transitions, 577 flow [2023-11-19 07:48:17,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 67 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:17,810 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 247 flow [2023-11-19 07:48:17,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-11-19 07:48:17,813 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2023-11-19 07:48:17,813 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 247 flow [2023-11-19 07:48:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:17,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:48:17,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:48:17,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:17,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1262757990, now seen corresponding path program 1 times [2023-11-19 07:48:17,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:17,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021958909] [2023-11-19 07:48:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:17,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:17,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021958909] [2023-11-19 07:48:17,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021958909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:17,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:48:17,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758672135] [2023-11-19 07:48:17,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:17,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:17,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:17,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:17,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:18,131 INFO L124 PetriNetUnfolderBase]: 1040/1548 cut-off events. [2023-11-19 07:48:18,131 INFO L125 PetriNetUnfolderBase]: For 2704/2704 co-relation queries the response was YES. [2023-11-19 07:48:18,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5394 conditions, 1548 events. 1040/1548 cut-off events. For 2704/2704 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6904 event pairs, 160 based on Foata normal form. 69/1277 useless extension candidates. Maximal degree in co-relation 5377. Up to 1140 conditions per place. [2023-11-19 07:48:18,148 INFO L140 encePairwiseOnDemand]: 240/244 looper letters, 63 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-19 07:48:18,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 580 flow [2023-11-19 07:48:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-19 07:48:18,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4644808743169399 [2023-11-19 07:48:18,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-19 07:48:18,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-19 07:48:18,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:18,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-19 07:48:18,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,155 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 247 flow. Second operand 3 states and 340 transitions. [2023-11-19 07:48:18,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 580 flow [2023-11-19 07:48:18,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:18,161 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 255 flow [2023-11-19 07:48:18,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2023-11-19 07:48:18,164 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2023-11-19 07:48:18,164 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 255 flow [2023-11-19 07:48:18,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:18,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:48:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:48:18,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:18,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:18,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1262755622, now seen corresponding path program 1 times [2023-11-19 07:48:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:18,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245361306] [2023-11-19 07:48:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:18,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245361306] [2023-11-19 07:48:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245361306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:18,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436263714] [2023-11-19 07:48:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:18,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:18,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:18,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 255 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:18,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:18,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:18,448 INFO L124 PetriNetUnfolderBase]: 970/1450 cut-off events. [2023-11-19 07:48:18,448 INFO L125 PetriNetUnfolderBase]: For 2218/2218 co-relation queries the response was YES. [2023-11-19 07:48:18,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5452 conditions, 1450 events. 970/1450 cut-off events. For 2218/2218 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6069 event pairs, 339 based on Foata normal form. 84/1255 useless extension candidates. Maximal degree in co-relation 5433. Up to 918 conditions per place. [2023-11-19 07:48:18,465 INFO L140 encePairwiseOnDemand]: 240/244 looper letters, 44 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2023-11-19 07:48:18,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 415 flow [2023-11-19 07:48:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-11-19 07:48:18,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672131147540984 [2023-11-19 07:48:18,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-11-19 07:48:18,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-11-19 07:48:18,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:18,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-11-19 07:48:18,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,472 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 255 flow. Second operand 3 states and 342 transitions. [2023-11-19 07:48:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 415 flow [2023-11-19 07:48:18,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 409 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:18,478 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 273 flow [2023-11-19 07:48:18,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-19 07:48:18,479 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-11-19 07:48:18,479 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 273 flow [2023-11-19 07:48:18,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:18,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:48:18,480 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:18,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 490795439, now seen corresponding path program 1 times [2023-11-19 07:48:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:18,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41254239] [2023-11-19 07:48:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:18,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41254239] [2023-11-19 07:48:18,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41254239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91787368] [2023-11-19 07:48:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:18,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:18,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:18,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:48:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:48:18,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:18,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:18,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91787368] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:18,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:18,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-19 07:48:18,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538298630] [2023-11-19 07:48:18,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:18,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:18,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:18,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:18,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:18,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:18,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:18,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:18,984 INFO L124 PetriNetUnfolderBase]: 835/1250 cut-off events. [2023-11-19 07:48:18,985 INFO L125 PetriNetUnfolderBase]: For 3083/3083 co-relation queries the response was YES. [2023-11-19 07:48:18,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1250 events. 835/1250 cut-off events. For 3083/3083 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5364 event pairs, 154 based on Foata normal form. 0/1048 useless extension candidates. Maximal degree in co-relation 4900. Up to 865 conditions per place. [2023-11-19 07:48:19,001 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 60 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-19 07:48:19,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 615 flow [2023-11-19 07:48:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:48:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2023-11-19 07:48:19,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45184426229508196 [2023-11-19 07:48:19,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 441 transitions. [2023-11-19 07:48:19,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 441 transitions. [2023-11-19 07:48:19,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:19,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 441 transitions. [2023-11-19 07:48:19,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:19,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:19,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:19,011 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 273 flow. Second operand 4 states and 441 transitions. [2023-11-19 07:48:19,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 615 flow [2023-11-19 07:48:19,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:19,017 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 267 flow [2023-11-19 07:48:19,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-19 07:48:19,021 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-11-19 07:48:19,022 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 267 flow [2023-11-19 07:48:19,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:19,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:19,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:19,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,244 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:19,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 490795510, now seen corresponding path program 1 times [2023-11-19 07:48:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986641333] [2023-11-19 07:48:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:19,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986641333] [2023-11-19 07:48:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986641333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048932522] [2023-11-19 07:48:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:19,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:19,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:48:19,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:19,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:19,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048932522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:19,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:19,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-19 07:48:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172384591] [2023-11-19 07:48:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:48:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:48:19,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:19,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 244 [2023-11-19 07:48:19,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 267 flow. Second operand has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:19,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:19,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 244 [2023-11-19 07:48:19,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:20,024 INFO L124 PetriNetUnfolderBase]: 1980/2915 cut-off events. [2023-11-19 07:48:20,024 INFO L125 PetriNetUnfolderBase]: For 7982/7982 co-relation queries the response was YES. [2023-11-19 07:48:20,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11333 conditions, 2915 events. 1980/2915 cut-off events. For 7982/7982 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 13676 event pairs, 154 based on Foata normal form. 195/2422 useless extension candidates. Maximal degree in co-relation 11312. Up to 931 conditions per place. [2023-11-19 07:48:20,068 INFO L140 encePairwiseOnDemand]: 240/244 looper letters, 141 selfloop transitions, 8 changer transitions 0/149 dead transitions. [2023-11-19 07:48:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 149 transitions, 1469 flow [2023-11-19 07:48:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:48:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:48:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 667 transitions. [2023-11-19 07:48:20,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45560109289617484 [2023-11-19 07:48:20,073 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 667 transitions. [2023-11-19 07:48:20,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 667 transitions. [2023-11-19 07:48:20,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:20,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 667 transitions. [2023-11-19 07:48:20,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.16666666666667) internal successors, (667), 6 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 244.0) internal successors, (1708), 7 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 244.0) internal successors, (1708), 7 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,082 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 267 flow. Second operand 6 states and 667 transitions. [2023-11-19 07:48:20,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 149 transitions, 1469 flow [2023-11-19 07:48:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 149 transitions, 1466 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:20,094 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 325 flow [2023-11-19 07:48:20,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-11-19 07:48:20,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2023-11-19 07:48:20,097 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 325 flow [2023-11-19 07:48:20,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:20,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:20,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:20,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:48:20,312 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:20,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash 490795536, now seen corresponding path program 1 times [2023-11-19 07:48:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423390687] [2023-11-19 07:48:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423390687] [2023-11-19 07:48:20,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423390687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412958793] [2023-11-19 07:48:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:20,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:20,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:48:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:20,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:48:20,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:20,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:20,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412958793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:20,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:20,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-19 07:48:20,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483229053] [2023-11-19 07:48:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:20,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:20,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:20,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:20,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:20,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:20,820 INFO L124 PetriNetUnfolderBase]: 1510/2250 cut-off events. [2023-11-19 07:48:20,821 INFO L125 PetriNetUnfolderBase]: For 6574/6574 co-relation queries the response was YES. [2023-11-19 07:48:20,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9522 conditions, 2250 events. 1510/2250 cut-off events. For 6574/6574 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10348 event pairs, 154 based on Foata normal form. 0/2118 useless extension candidates. Maximal degree in co-relation 9498. Up to 1865 conditions per place. [2023-11-19 07:48:20,844 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 62 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-11-19 07:48:20,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 641 flow [2023-11-19 07:48:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:48:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-11-19 07:48:20,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45081967213114754 [2023-11-19 07:48:20,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-11-19 07:48:20,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-11-19 07:48:20,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:20,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-11-19 07:48:20,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,852 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 325 flow. Second operand 4 states and 440 transitions. [2023-11-19 07:48:20,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 641 flow [2023-11-19 07:48:20,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 639 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:20,863 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 298 flow [2023-11-19 07:48:20,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-19 07:48:20,864 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-11-19 07:48:20,864 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 298 flow [2023-11-19 07:48:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:20,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:21,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:21,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:21,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1967576442, now seen corresponding path program 1 times [2023-11-19 07:48:21,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:21,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906107442] [2023-11-19 07:48:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:21,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:21,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906107442] [2023-11-19 07:48:21,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906107442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:21,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314436845] [2023-11-19 07:48:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:21,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:21,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:21,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:48:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:21,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:48:21,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:21,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314436845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:21,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:21,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-19 07:48:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224073101] [2023-11-19 07:48:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:21,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:21,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:21,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 298 flow. Second operand has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:21,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:21,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:21,646 INFO L124 PetriNetUnfolderBase]: 1631/2426 cut-off events. [2023-11-19 07:48:21,646 INFO L125 PetriNetUnfolderBase]: For 6896/6896 co-relation queries the response was YES. [2023-11-19 07:48:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10313 conditions, 2426 events. 1631/2426 cut-off events. For 6896/6896 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11044 event pairs, 513 based on Foata normal form. 0/2426 useless extension candidates. Maximal degree in co-relation 10288. Up to 1045 conditions per place. [2023-11-19 07:48:21,672 INFO L140 encePairwiseOnDemand]: 240/244 looper letters, 56 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2023-11-19 07:48:21,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 622 flow [2023-11-19 07:48:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:48:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:48:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-11-19 07:48:21,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540983606557377 [2023-11-19 07:48:21,675 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-11-19 07:48:21,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-11-19 07:48:21,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:21,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-11-19 07:48:21,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 244.0) internal successors, (1464), 6 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 244.0) internal successors, (1464), 6 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,682 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 298 flow. Second operand 5 states and 554 transitions. [2023-11-19 07:48:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 622 flow [2023-11-19 07:48:21,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 617 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:21,693 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 319 flow [2023-11-19 07:48:21,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-11-19 07:48:21,694 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2023-11-19 07:48:21,694 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 319 flow [2023-11-19 07:48:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:21,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 07:48:21,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:21,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:21,908 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:21,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:21,909 INFO L85 PathProgramCache]: Analyzing trace with hash 536154297, now seen corresponding path program 2 times [2023-11-19 07:48:21,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:21,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046302021] [2023-11-19 07:48:21,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:21,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:22,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046302021] [2023-11-19 07:48:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046302021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913115937] [2023-11-19 07:48:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:48:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:22,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:22,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:48:22,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:48:22,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:22,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:48:22,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:22,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:22,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913115937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:22,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:22,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:48:22,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121286922] [2023-11-19 07:48:22,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:22,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:48:22,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:48:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:48:22,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:22,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 319 flow. Second operand has 17 states, 17 states have (on average 104.41176470588235) internal successors, (1775), 17 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:22,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:22,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:22,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:23,298 INFO L124 PetriNetUnfolderBase]: 2623/3926 cut-off events. [2023-11-19 07:48:23,299 INFO L125 PetriNetUnfolderBase]: For 16558/16558 co-relation queries the response was YES. [2023-11-19 07:48:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17796 conditions, 3926 events. 2623/3926 cut-off events. For 16558/16558 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18914 event pairs, 219 based on Foata normal form. 496/4422 useless extension candidates. Maximal degree in co-relation 17770. Up to 1786 conditions per place. [2023-11-19 07:48:23,340 INFO L140 encePairwiseOnDemand]: 239/244 looper letters, 152 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2023-11-19 07:48:23,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 183 transitions, 1588 flow [2023-11-19 07:48:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:48:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:48:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1371 transitions. [2023-11-19 07:48:23,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682377049180328 [2023-11-19 07:48:23,347 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1371 transitions. [2023-11-19 07:48:23,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1371 transitions. [2023-11-19 07:48:23,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:23,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1371 transitions. [2023-11-19 07:48:23,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.25) internal successors, (1371), 12 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 244.0) internal successors, (3172), 13 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,362 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 244.0) internal successors, (3172), 13 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,362 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 319 flow. Second operand 12 states and 1371 transitions. [2023-11-19 07:48:23,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 183 transitions, 1588 flow [2023-11-19 07:48:23,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 183 transitions, 1551 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:23,394 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 648 flow [2023-11-19 07:48:23,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=648, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-11-19 07:48:23,395 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2023-11-19 07:48:23,395 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 648 flow [2023-11-19 07:48:23,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.41176470588235) internal successors, (1775), 17 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:23,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:23,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:23,614 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:23,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1967576482, now seen corresponding path program 1 times [2023-11-19 07:48:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:23,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258228854] [2023-11-19 07:48:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:23,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258228854] [2023-11-19 07:48:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258228854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:23,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008888908] [2023-11-19 07:48:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:23,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:23,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:23,712 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:23,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:48:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:23,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:48:23,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:23,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008888908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:23,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:23,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-19 07:48:23,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038039932] [2023-11-19 07:48:23,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:23,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:48:23,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:48:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:48:23,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:23,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 648 flow. Second operand has 11 states, 11 states have (on average 105.18181818181819) internal successors, (1157), 11 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:23,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:23,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:23,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:24,881 INFO L124 PetriNetUnfolderBase]: 3415/5114 cut-off events. [2023-11-19 07:48:24,881 INFO L125 PetriNetUnfolderBase]: For 33646/33646 co-relation queries the response was YES. [2023-11-19 07:48:24,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26357 conditions, 5114 events. 3415/5114 cut-off events. For 33646/33646 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26729 event pairs, 274 based on Foata normal form. 264/5378 useless extension candidates. Maximal degree in co-relation 26325. Up to 3566 conditions per place. [2023-11-19 07:48:24,948 INFO L140 encePairwiseOnDemand]: 239/244 looper letters, 122 selfloop transitions, 21 changer transitions 0/143 dead transitions. [2023-11-19 07:48:24,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 143 transitions, 1500 flow [2023-11-19 07:48:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:48:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:48:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 907 transitions. [2023-11-19 07:48:24,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646516393442623 [2023-11-19 07:48:24,953 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 907 transitions. [2023-11-19 07:48:24,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 907 transitions. [2023-11-19 07:48:24,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:24,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 907 transitions. [2023-11-19 07:48:24,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,962 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 244.0) internal successors, (2196), 9 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:24,962 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 648 flow. Second operand 8 states and 907 transitions. [2023-11-19 07:48:24,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 143 transitions, 1500 flow [2023-11-19 07:48:25,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 143 transitions, 1424 flow, removed 35 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:25,053 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 832 flow [2023-11-19 07:48:25,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=832, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2023-11-19 07:48:25,054 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2023-11-19 07:48:25,054 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 832 flow [2023-11-19 07:48:25,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.18181818181819) internal successors, (1157), 11 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:25,056 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:25,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:25,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:25,275 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:25,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1221636845, now seen corresponding path program 2 times [2023-11-19 07:48:25,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:25,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337385053] [2023-11-19 07:48:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:25,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:25,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:25,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337385053] [2023-11-19 07:48:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337385053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:25,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748358318] [2023-11-19 07:48:25,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:48:25,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:25,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:25,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:25,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:48:25,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:48:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:25,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:48:25,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:25,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748358318] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:25,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:25,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:48:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336544111] [2023-11-19 07:48:25,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:25,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:48:25,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:48:25,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:48:25,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 244 [2023-11-19 07:48:25,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 832 flow. Second operand has 17 states, 17 states have (on average 100.76470588235294) internal successors, (1713), 17 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:25,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:25,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 244 [2023-11-19 07:48:25,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:28,134 INFO L124 PetriNetUnfolderBase]: 7087/10586 cut-off events. [2023-11-19 07:48:28,134 INFO L125 PetriNetUnfolderBase]: For 124460/124460 co-relation queries the response was YES. [2023-11-19 07:48:28,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56384 conditions, 10586 events. 7087/10586 cut-off events. For 124460/124460 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 58373 event pairs, 343 based on Foata normal form. 900/11486 useless extension candidates. Maximal degree in co-relation 56347. Up to 3151 conditions per place. [2023-11-19 07:48:28,279 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 654 selfloop transitions, 11 changer transitions 0/665 dead transitions. [2023-11-19 07:48:28,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 665 transitions, 9744 flow [2023-11-19 07:48:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:48:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:48:28,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1309 transitions. [2023-11-19 07:48:28,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44706284153005466 [2023-11-19 07:48:28,287 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1309 transitions. [2023-11-19 07:48:28,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1309 transitions. [2023-11-19 07:48:28,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:28,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1309 transitions. [2023-11-19 07:48:28,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.08333333333333) internal successors, (1309), 12 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:28,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 244.0) internal successors, (3172), 13 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:28,302 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 244.0) internal successors, (3172), 13 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:28,302 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 832 flow. Second operand 12 states and 1309 transitions. [2023-11-19 07:48:28,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 665 transitions, 9744 flow [2023-11-19 07:48:28,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 665 transitions, 9160 flow, removed 264 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:28,493 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 862 flow [2023-11-19 07:48:28,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=862, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2023-11-19 07:48:28,495 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-11-19 07:48:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 862 flow [2023-11-19 07:48:28,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.76470588235294) internal successors, (1713), 17 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:28,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:28,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:28,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:28,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:48:28,712 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:28,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -26871447, now seen corresponding path program 1 times [2023-11-19 07:48:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522013241] [2023-11-19 07:48:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:28,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522013241] [2023-11-19 07:48:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522013241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361855492] [2023-11-19 07:48:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:28,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:28,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:28,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:28,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:48:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:28,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:48:28,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:29,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:29,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361855492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:29,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:29,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:48:29,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548191284] [2023-11-19 07:48:29,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:48:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:48:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:48:29,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:29,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 862 flow. Second operand has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:29,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:29,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:29,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:32,586 INFO L124 PetriNetUnfolderBase]: 10457/15799 cut-off events. [2023-11-19 07:48:32,587 INFO L125 PetriNetUnfolderBase]: For 163297/163297 co-relation queries the response was YES. [2023-11-19 07:48:32,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85278 conditions, 15799 events. 10457/15799 cut-off events. For 163297/163297 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 97678 event pairs, 482 based on Foata normal form. 727/16526 useless extension candidates. Maximal degree in co-relation 85235. Up to 5979 conditions per place. [2023-11-19 07:48:32,798 INFO L140 encePairwiseOnDemand]: 238/244 looper letters, 264 selfloop transitions, 73 changer transitions 0/337 dead transitions. [2023-11-19 07:48:32,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 337 transitions, 3841 flow [2023-11-19 07:48:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:48:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-19 07:48:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1696 transitions. [2023-11-19 07:48:32,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633879781420765 [2023-11-19 07:48:32,974 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1696 transitions. [2023-11-19 07:48:32,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1696 transitions. [2023-11-19 07:48:32,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:32,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1696 transitions. [2023-11-19 07:48:32,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.06666666666666) internal successors, (1696), 15 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:32,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 244.0) internal successors, (3904), 16 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:32,993 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 244.0) internal successors, (3904), 16 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:32,993 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 862 flow. Second operand 15 states and 1696 transitions. [2023-11-19 07:48:32,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 337 transitions, 3841 flow [2023-11-19 07:48:33,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 337 transitions, 3553 flow, removed 91 selfloop flow, removed 5 redundant places. [2023-11-19 07:48:33,688 INFO L231 Difference]: Finished difference. Result has 106 places, 116 transitions, 1594 flow [2023-11-19 07:48:33,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1594, PETRI_PLACES=106, PETRI_TRANSITIONS=116} [2023-11-19 07:48:33,689 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2023-11-19 07:48:33,689 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 116 transitions, 1594 flow [2023-11-19 07:48:33,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:33,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:33,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:33,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:33,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:48:33,918 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:33,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1306925785, now seen corresponding path program 1 times [2023-11-19 07:48:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309855872] [2023-11-19 07:48:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:34,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:34,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309855872] [2023-11-19 07:48:34,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309855872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:34,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855065719] [2023-11-19 07:48:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:34,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:34,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:34,029 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:34,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:48:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:34,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:48:34,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:34,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:34,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855065719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:34,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:34,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:48:34,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572082059] [2023-11-19 07:48:34,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:34,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:48:34,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:48:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:48:34,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:34,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 116 transitions, 1594 flow. Second operand has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:34,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:34,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:34,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:39,477 INFO L124 PetriNetUnfolderBase]: 15563/23656 cut-off events. [2023-11-19 07:48:39,477 INFO L125 PetriNetUnfolderBase]: For 334361/334361 co-relation queries the response was YES. [2023-11-19 07:48:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142740 conditions, 23656 events. 15563/23656 cut-off events. For 334361/334361 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 158622 event pairs, 793 based on Foata normal form. 727/24383 useless extension candidates. Maximal degree in co-relation 142690. Up to 10323 conditions per place. [2023-11-19 07:48:39,798 INFO L140 encePairwiseOnDemand]: 238/244 looper letters, 346 selfloop transitions, 108 changer transitions 0/454 dead transitions. [2023-11-19 07:48:39,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 454 transitions, 5496 flow [2023-11-19 07:48:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:48:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:48:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2027 transitions. [2023-11-19 07:48:39,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4615209471766849 [2023-11-19 07:48:39,808 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2027 transitions. [2023-11-19 07:48:39,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2027 transitions. [2023-11-19 07:48:39,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:39,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2027 transitions. [2023-11-19 07:48:39,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.61111111111111) internal successors, (2027), 18 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 244.0) internal successors, (4636), 19 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,830 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 244.0) internal successors, (4636), 19 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,831 INFO L175 Difference]: Start difference. First operand has 106 places, 116 transitions, 1594 flow. Second operand 18 states and 2027 transitions. [2023-11-19 07:48:39,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 454 transitions, 5496 flow [2023-11-19 07:48:43,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 454 transitions, 5190 flow, removed 144 selfloop flow, removed 6 redundant places. [2023-11-19 07:48:43,472 INFO L231 Difference]: Finished difference. Result has 124 places, 180 transitions, 2668 flow [2023-11-19 07:48:43,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2668, PETRI_PLACES=124, PETRI_TRANSITIONS=180} [2023-11-19 07:48:43,473 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2023-11-19 07:48:43,473 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 180 transitions, 2668 flow [2023-11-19 07:48:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:43,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:43,474 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:43,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:43,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:48:43,688 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-19 07:48:43,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1866456294, now seen corresponding path program 2 times [2023-11-19 07:48:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364453847] [2023-11-19 07:48:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:43,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:43,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364453847] [2023-11-19 07:48:43,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364453847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:43,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161896693] [2023-11-19 07:48:43,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:48:43,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:43,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:43,834 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:43,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb373b7f-7e7f-47b0-ab75-1fdb1a453b75/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:48:43,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:48:43,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:48:43,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:48:43,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:44,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161896693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:44,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:44,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-19 07:48:44,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600301124] [2023-11-19 07:48:44,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:44,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:48:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:48:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:48:44,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 244 [2023-11-19 07:48:44,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 180 transitions, 2668 flow. Second operand has 20 states, 20 states have (on average 104.8) internal successors, (2096), 20 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:44,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:44,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 244 [2023-11-19 07:48:44,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:51,886 INFO L124 PetriNetUnfolderBase]: 20735/31632 cut-off events. [2023-11-19 07:48:51,886 INFO L125 PetriNetUnfolderBase]: For 593436/593436 co-relation queries the response was YES. [2023-11-19 07:48:52,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201169 conditions, 31632 events. 20735/31632 cut-off events. For 593436/593436 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 222398 event pairs, 1269 based on Foata normal form. 944/32576 useless extension candidates. Maximal degree in co-relation 201113. Up to 12839 conditions per place. [2023-11-19 07:48:52,395 INFO L140 encePairwiseOnDemand]: 238/244 looper letters, 352 selfloop transitions, 151 changer transitions 0/503 dead transitions. [2023-11-19 07:48:52,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 503 transitions, 6572 flow [2023-11-19 07:48:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:48:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-19 07:48:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1925 transitions. [2023-11-19 07:48:52,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640790742526519 [2023-11-19 07:48:52,404 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1925 transitions. [2023-11-19 07:48:52,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1925 transitions. [2023-11-19 07:48:52,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:52,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1925 transitions. [2023-11-19 07:48:52,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 113.23529411764706) internal successors, (1925), 17 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:52,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 244.0) internal successors, (4392), 18 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:52,426 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 244.0) internal successors, (4392), 18 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:52,427 INFO L175 Difference]: Start difference. First operand has 124 places, 180 transitions, 2668 flow. Second operand 17 states and 1925 transitions. [2023-11-19 07:48:52,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 503 transitions, 6572 flow