./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya --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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:22:58,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:22:58,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 06:22:58,616 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:22:58,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:22:58,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:22:58,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:22:58,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:22:58,643 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:22:58,643 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:22:58,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:22:58,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:22:58,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:22:58,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:22:58,646 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:22:58,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:22:58,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:22:58,647 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:22:58,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:22:58,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:22:58,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:22:58,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:22:58,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:22:58,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:22:58,651 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 06:22:58,651 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:22:58,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:22:58,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:22:58,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:22:58,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:22:58,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:22:58,654 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:22:58,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:22:58,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:22:58,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:22:58,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:22:58,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:22:58,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:22:58,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:22:58,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:22:58,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:22:58,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:22:58,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:22:58,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:22:58,657 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_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2023-11-29 06:22:58,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:22:58,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:22:58,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:22:58,903 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:22:58,903 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:22:58,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-29 06:23:01,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:23:01,874 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:23:01,874 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-29 06:23:01,881 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/data/6bce08c96/299d314680744ebc9c63158f2eb9efb5/FLAG977a3da16 [2023-11-29 06:23:01,893 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/data/6bce08c96/299d314680744ebc9c63158f2eb9efb5 [2023-11-29 06:23:01,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:23:01,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:23:01,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:23:01,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:23:01,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:23:01,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:23:01" (1/1) ... [2023-11-29 06:23:01,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490db910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:01, skipping insertion in model container [2023-11-29 06:23:01,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:23:01" (1/1) ... [2023-11-29 06:23:01,928 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:23:02,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:23:02,093 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:23:02,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:23:02,124 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:23:02,124 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:23:02,130 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:23:02,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02 WrapperNode [2023-11-29 06:23:02,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:23:02,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:23:02,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:23:02,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:23:02,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,171 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 161 [2023-11-29 06:23:02,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:23:02,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:23:02,172 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:23:02,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:23:02,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,184 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,199 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 06:23:02,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,211 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,215 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:23:02,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:23:02,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:23:02,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:23:02,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (1/1) ... [2023-11-29 06:23:02,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:23:02,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:02,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:23:02,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:23:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:23:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:23:02,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:23:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:23:02,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:23:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:23:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:23:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:23:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:23:02,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:23:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:23:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:23:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:23:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:23:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:23:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:23:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:23:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:23:02,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:23:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:23:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:23:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:23:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:23:02,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:23:02,281 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:23:02,387 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:23:02,389 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:23:02,650 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:23:02,880 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:23:02,880 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:23:02,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:02 BoogieIcfgContainer [2023-11-29 06:23:02,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:23:02,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:23:02,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:23:02,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:23:02,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:23:01" (1/3) ... [2023-11-29 06:23:02,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9607ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:23:02, skipping insertion in model container [2023-11-29 06:23:02,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:02" (2/3) ... [2023-11-29 06:23:02,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9607ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:23:02, skipping insertion in model container [2023-11-29 06:23:02,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:02" (3/3) ... [2023-11-29 06:23:02,888 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-29 06:23:02,895 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:23:02,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:23:02,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 06:23:02,903 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:23:02,951 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:23:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2023-11-29 06:23:03,003 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2023-11-29 06:23:03,003 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:23:03,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 98 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2023-11-29 06:23:03,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2023-11-29 06:23:03,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 39 transitions, 87 flow [2023-11-29 06:23:03,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:23:03,028 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;@484d8505, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:23:03,029 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-29 06:23:03,032 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:23:03,032 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 06:23:03,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:23:03,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:03,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:23:03,033 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:03,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:03,038 INFO L85 PathProgramCache]: Analyzing trace with hash 492944, now seen corresponding path program 1 times [2023-11-29 06:23:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821255288] [2023-11-29 06:23:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:03,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821255288] [2023-11-29 06:23:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821255288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:03,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:03,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:23:03,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479022055] [2023-11-29 06:23:03,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:03,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:03,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:03,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:23:03,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:03,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:03,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:03,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:03,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:03,555 INFO L124 PetriNetUnfolderBase]: 305/548 cut-off events. [2023-11-29 06:23:03,555 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 06:23:03,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 548 events. 305/548 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2885 event pairs, 236 based on Foata normal form. 62/371 useless extension candidates. Maximal degree in co-relation 963. Up to 500 conditions per place. [2023-11-29 06:23:03,563 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 28 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2023-11-29 06:23:03,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 151 flow [2023-11-29 06:23:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2023-11-29 06:23:03,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2023-11-29 06:23:03,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2023-11-29 06:23:03,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2023-11-29 06:23:03,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:03,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2023-11-29 06:23:03,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:03,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:03,608 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:03,610 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 87 flow. Second operand 4 states and 73 transitions. [2023-11-29 06:23:03,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 151 flow [2023-11-29 06:23:03,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:23:03,615 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 105 flow [2023-11-29 06:23:03,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-11-29 06:23:03,619 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-11-29 06:23:03,620 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 105 flow [2023-11-29 06:23:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:03,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:03,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 06:23:03,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:23:03,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:03,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:03,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1800875189, now seen corresponding path program 1 times [2023-11-29 06:23:03,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:03,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880514220] [2023-11-29 06:23:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:03,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880514220] [2023-11-29 06:23:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880514220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806846843] [2023-11-29 06:23:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:03,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:03,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:03,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:23:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:03,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:23:03,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:03,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:23:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806846843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:03,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:23:03,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 06:23:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911882626] [2023-11-29 06:23:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:23:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:23:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:23:03,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:03,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:03,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:03,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:03,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:04,057 INFO L124 PetriNetUnfolderBase]: 305/547 cut-off events. [2023-11-29 06:23:04,057 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:23:04,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 547 events. 305/547 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2857 event pairs, 236 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 1053. Up to 495 conditions per place. [2023-11-29 06:23:04,064 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 24 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2023-11-29 06:23:04,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 163 flow [2023-11-29 06:23:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:23:04,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:23:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2023-11-29 06:23:04,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-29 06:23:04,067 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 86 transitions. [2023-11-29 06:23:04,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 86 transitions. [2023-11-29 06:23:04,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:04,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 86 transitions. [2023-11-29 06:23:04,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,071 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,071 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 105 flow. Second operand 6 states and 86 transitions. [2023-11-29 06:23:04,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 163 flow [2023-11-29 06:23:04,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:04,073 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 112 flow [2023-11-29 06:23:04,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-29 06:23:04,074 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-11-29 06:23:04,074 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 112 flow [2023-11-29 06:23:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:04,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:04,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 06:23:04,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:04,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:04,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash 69678570, now seen corresponding path program 1 times [2023-11-29 06:23:04,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122017613] [2023-11-29 06:23:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:04,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122017613] [2023-11-29 06:23:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122017613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:04,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:04,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:23:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890547438] [2023-11-29 06:23:04,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:04,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:23:04,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:04,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:23:04,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:23:04,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:04,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:04,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:04,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:04,503 INFO L124 PetriNetUnfolderBase]: 369/693 cut-off events. [2023-11-29 06:23:04,503 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 06:23:04,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 693 events. 369/693 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3640 event pairs, 161 based on Foata normal form. 20/441 useless extension candidates. Maximal degree in co-relation 1309. Up to 407 conditions per place. [2023-11-29 06:23:04,508 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 40 selfloop transitions, 3 changer transitions 2/53 dead transitions. [2023-11-29 06:23:04,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 233 flow [2023-11-29 06:23:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:23:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:23:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2023-11-29 06:23:04,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2023-11-29 06:23:04,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2023-11-29 06:23:04,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2023-11-29 06:23:04,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:04,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2023-11-29 06:23:04,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,514 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 112 flow. Second operand 3 states and 79 transitions. [2023-11-29 06:23:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 233 flow [2023-11-29 06:23:04,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 211 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 06:23:04,517 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 115 flow [2023-11-29 06:23:04,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-11-29 06:23:04,518 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-29 06:23:04,518 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 115 flow [2023-11-29 06:23:04,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:04,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 06:23:04,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:23:04,519 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:04,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash -7443503, now seen corresponding path program 1 times [2023-11-29 06:23:04,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:04,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973092752] [2023-11-29 06:23:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:04,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:04,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:04,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973092752] [2023-11-29 06:23:04,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973092752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:04,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427365939] [2023-11-29 06:23:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:04,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:04,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:04,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:04,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:23:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:04,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:23:04,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:04,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:04,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427365939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:04,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:04,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 06:23:04,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209853901] [2023-11-29 06:23:04,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:04,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:23:04,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:23:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:23:04,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:04,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 115 flow. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:04,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:04,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:04,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:05,031 INFO L124 PetriNetUnfolderBase]: 372/691 cut-off events. [2023-11-29 06:23:05,031 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-29 06:23:05,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 691 events. 372/691 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3717 event pairs, 289 based on Foata normal form. 3/464 useless extension candidates. Maximal degree in co-relation 1432. Up to 619 conditions per place. [2023-11-29 06:23:05,037 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 13 changer transitions 0/49 dead transitions. [2023-11-29 06:23:05,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 229 flow [2023-11-29 06:23:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:23:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:23:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2023-11-29 06:23:05,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30930232558139537 [2023-11-29 06:23:05,040 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 133 transitions. [2023-11-29 06:23:05,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 133 transitions. [2023-11-29 06:23:05,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:05,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 133 transitions. [2023-11-29 06:23:05,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 43.0) internal successors, (473), 11 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,044 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 43.0) internal successors, (473), 11 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,044 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 115 flow. Second operand 10 states and 133 transitions. [2023-11-29 06:23:05,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 229 flow [2023-11-29 06:23:05,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:05,047 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 186 flow [2023-11-29 06:23:05,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-11-29 06:23:05,048 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2023-11-29 06:23:05,049 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 186 flow [2023-11-29 06:23:05,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:05,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:05,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:23:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:05,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:05,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash -586041531, now seen corresponding path program 1 times [2023-11-29 06:23:05,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:05,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358513740] [2023-11-29 06:23:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358513740] [2023-11-29 06:23:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358513740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:05,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:23:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550541037] [2023-11-29 06:23:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:05,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:23:05,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:23:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:23:05,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:05,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:05,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:05,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:05,432 INFO L124 PetriNetUnfolderBase]: 292/573 cut-off events. [2023-11-29 06:23:05,432 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-11-29 06:23:05,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 573 events. 292/573 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2870 event pairs, 85 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 1182. Up to 380 conditions per place. [2023-11-29 06:23:05,437 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 45 selfloop transitions, 1 changer transitions 2/56 dead transitions. [2023-11-29 06:23:05,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 297 flow [2023-11-29 06:23:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:23:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:23:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-29 06:23:05,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2023-11-29 06:23:05,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-29 06:23:05,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-29 06:23:05,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:05,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-29 06:23:05,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,441 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 186 flow. Second operand 3 states and 69 transitions. [2023-11-29 06:23:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 297 flow [2023-11-29 06:23:05,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 286 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 06:23:05,445 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 178 flow [2023-11-29 06:23:05,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-29 06:23:05,446 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2023-11-29 06:23:05,446 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 178 flow [2023-11-29 06:23:05,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:05,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:05,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:23:05,447 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:05,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash -586041496, now seen corresponding path program 1 times [2023-11-29 06:23:05,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:05,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606333905] [2023-11-29 06:23:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:05,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:05,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606333905] [2023-11-29 06:23:05,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606333905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:05,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:05,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:23:05,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404245565] [2023-11-29 06:23:05,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:05,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:05,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:23:05,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:05,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:05,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:05,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:05,692 INFO L124 PetriNetUnfolderBase]: 336/652 cut-off events. [2023-11-29 06:23:05,692 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-29 06:23:05,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 652 events. 336/652 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3363 event pairs, 262 based on Foata normal form. 8/521 useless extension candidates. Maximal degree in co-relation 1397. Up to 487 conditions per place. [2023-11-29 06:23:05,697 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 37 selfloop transitions, 2 changer transitions 13/60 dead transitions. [2023-11-29 06:23:05,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 310 flow [2023-11-29 06:23:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-29 06:23:05,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2023-11-29 06:23:05,698 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-29 06:23:05,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-29 06:23:05,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:05,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-29 06:23:05,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,701 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 178 flow. Second operand 4 states and 85 transitions. [2023-11-29 06:23:05,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 310 flow [2023-11-29 06:23:05,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:23:05,704 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 181 flow [2023-11-29 06:23:05,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-29 06:23:05,705 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2023-11-29 06:23:05,705 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 181 flow [2023-11-29 06:23:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:05,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:05,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:05,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:23:05,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:05,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -759976797, now seen corresponding path program 1 times [2023-11-29 06:23:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:05,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667779046] [2023-11-29 06:23:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667779046] [2023-11-29 06:23:05,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667779046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43190399] [2023-11-29 06:23:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:05,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:05,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:05,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:23:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:05,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:23:05,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:06,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:23:06,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43190399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:06,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:23:06,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-29 06:23:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911310979] [2023-11-29 06:23:06,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:06,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:23:06,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:06,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:06,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:06,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:06,126 INFO L124 PetriNetUnfolderBase]: 197/414 cut-off events. [2023-11-29 06:23:06,126 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-11-29 06:23:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 414 events. 197/414 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1926 event pairs, 102 based on Foata normal form. 52/372 useless extension candidates. Maximal degree in co-relation 892. Up to 267 conditions per place. [2023-11-29 06:23:06,129 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 7 changer transitions 8/53 dead transitions. [2023-11-29 06:23:06,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 288 flow [2023-11-29 06:23:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2023-11-29 06:23:06,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2023-11-29 06:23:06,131 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 79 transitions. [2023-11-29 06:23:06,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 79 transitions. [2023-11-29 06:23:06,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:06,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 79 transitions. [2023-11-29 06:23:06,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,133 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,133 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 181 flow. Second operand 4 states and 79 transitions. [2023-11-29 06:23:06,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 288 flow [2023-11-29 06:23:06,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 282 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 06:23:06,136 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 172 flow [2023-11-29 06:23:06,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-11-29 06:23:06,137 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2023-11-29 06:23:06,137 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 172 flow [2023-11-29 06:23:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:06,137 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 06:23:06,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:23:06,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:06,342 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:06,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash -560551274, now seen corresponding path program 2 times [2023-11-29 06:23:06,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:06,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289626735] [2023-11-29 06:23:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:06,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:06,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289626735] [2023-11-29 06:23:06,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289626735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655541333] [2023-11-29 06:23:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:06,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:06,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:06,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:23:06,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:23:06,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:06,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:23:06,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 06:23:06,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 06:23:06,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655541333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:06,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:06,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 06:23:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329297536] [2023-11-29 06:23:06,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:23:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:23:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:23:06,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:06,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 172 flow. Second operand has 14 states, 14 states have (on average 10.142857142857142) internal successors, (142), 14 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:06,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:06,903 INFO L124 PetriNetUnfolderBase]: 102/223 cut-off events. [2023-11-29 06:23:06,903 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-29 06:23:06,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 223 events. 102/223 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 837 event pairs, 65 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 521. Up to 167 conditions per place. [2023-11-29 06:23:06,905 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 17 selfloop transitions, 18 changer transitions 0/42 dead transitions. [2023-11-29 06:23:06,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 248 flow [2023-11-29 06:23:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:23:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:23:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2023-11-29 06:23:06,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26578073089701 [2023-11-29 06:23:06,907 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 160 transitions. [2023-11-29 06:23:06,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 160 transitions. [2023-11-29 06:23:06,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:06,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 160 transitions. [2023-11-29 06:23:06,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.428571428571429) internal successors, (160), 14 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,910 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,911 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 172 flow. Second operand 14 states and 160 transitions. [2023-11-29 06:23:06,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 248 flow [2023-11-29 06:23:06,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 222 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-29 06:23:06,913 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 188 flow [2023-11-29 06:23:06,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=188, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-29 06:23:06,914 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2023-11-29 06:23:06,914 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 188 flow [2023-11-29 06:23:06,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.142857142857142) internal successors, (142), 14 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:06,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:06,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:06,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:23:07,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 06:23:07,118 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:07,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash -62864863, now seen corresponding path program 1 times [2023-11-29 06:23:07,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:07,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360215024] [2023-11-29 06:23:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:07,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:07,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:07,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360215024] [2023-11-29 06:23:07,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360215024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:07,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:07,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:23:07,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489959083] [2023-11-29 06:23:07,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:07,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:23:07,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:23:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:23:07,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:07,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:07,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:07,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:07,258 INFO L124 PetriNetUnfolderBase]: 143/288 cut-off events. [2023-11-29 06:23:07,259 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-11-29 06:23:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 288 events. 143/288 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1102 event pairs, 45 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 585. Up to 200 conditions per place. [2023-11-29 06:23:07,261 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 40 selfloop transitions, 2 changer transitions 2/49 dead transitions. [2023-11-29 06:23:07,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 294 flow [2023-11-29 06:23:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:23:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:23:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2023-11-29 06:23:07,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2023-11-29 06:23:07,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2023-11-29 06:23:07,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2023-11-29 06:23:07,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:07,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2023-11-29 06:23:07,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,264 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 188 flow. Second operand 3 states and 58 transitions. [2023-11-29 06:23:07,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 294 flow [2023-11-29 06:23:07,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 226 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-29 06:23:07,266 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 128 flow [2023-11-29 06:23:07,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-29 06:23:07,267 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2023-11-29 06:23:07,267 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 128 flow [2023-11-29 06:23:07,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:07,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:07,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:07,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:23:07,268 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:07,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -62865917, now seen corresponding path program 1 times [2023-11-29 06:23:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:07,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966155420] [2023-11-29 06:23:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:07,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:07,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966155420] [2023-11-29 06:23:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966155420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71393197] [2023-11-29 06:23:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:07,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:07,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:23:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:07,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:23:07,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:07,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:23:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:08,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:08,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-11-29 06:23:08,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:08,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2023-11-29 06:23:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:08,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71393197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:08,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2023-11-29 06:23:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072103733] [2023-11-29 06:23:08,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:23:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:08,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:23:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:23:08,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:08,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 128 flow. Second operand has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:08,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:08,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:08,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:09,610 INFO L124 PetriNetUnfolderBase]: 428/864 cut-off events. [2023-11-29 06:23:09,611 INFO L125 PetriNetUnfolderBase]: For 204/216 co-relation queries the response was YES. [2023-11-29 06:23:09,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 864 events. 428/864 cut-off events. For 204/216 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4885 event pairs, 83 based on Foata normal form. 0/761 useless extension candidates. Maximal degree in co-relation 819. Up to 225 conditions per place. [2023-11-29 06:23:09,617 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 33 changer transitions 6/130 dead transitions. [2023-11-29 06:23:09,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 130 transitions, 639 flow [2023-11-29 06:23:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:23:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:23:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 291 transitions. [2023-11-29 06:23:09,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3561811505507956 [2023-11-29 06:23:09,620 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 291 transitions. [2023-11-29 06:23:09,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 291 transitions. [2023-11-29 06:23:09,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:09,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 291 transitions. [2023-11-29 06:23:09,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 15.31578947368421) internal successors, (291), 19 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 43.0) internal successors, (860), 20 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,625 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 43.0) internal successors, (860), 20 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,625 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 128 flow. Second operand 19 states and 291 transitions. [2023-11-29 06:23:09,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 130 transitions, 639 flow [2023-11-29 06:23:09,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 130 transitions, 634 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:09,629 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 350 flow [2023-11-29 06:23:09,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=350, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2023-11-29 06:23:09,630 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 28 predicate places. [2023-11-29 06:23:09,630 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 350 flow [2023-11-29 06:23:09,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:09,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:09,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:09,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:23:09,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:23:09,831 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:09,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash -62865916, now seen corresponding path program 1 times [2023-11-29 06:23:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:09,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148666844] [2023-11-29 06:23:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:10,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148666844] [2023-11-29 06:23:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148666844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:10,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313761517] [2023-11-29 06:23:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:10,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:10,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:10,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:23:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:10,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:23:10,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:10,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 06:23:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:10,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:11,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-29 06:23:11,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-29 06:23:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:11,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313761517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:11,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:11,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-29 06:23:11,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556485344] [2023-11-29 06:23:11,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:11,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:23:11,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:23:11,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:23:11,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:11,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 11.0) internal successors, (198), 18 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:11,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:11,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:11,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:12,977 INFO L124 PetriNetUnfolderBase]: 823/1637 cut-off events. [2023-11-29 06:23:12,977 INFO L125 PetriNetUnfolderBase]: For 3473/3491 co-relation queries the response was YES. [2023-11-29 06:23:12,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4826 conditions, 1637 events. 823/1637 cut-off events. For 3473/3491 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9948 event pairs, 118 based on Foata normal form. 122/1735 useless extension candidates. Maximal degree in co-relation 4116. Up to 489 conditions per place. [2023-11-29 06:23:12,992 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 97 selfloop transitions, 58 changer transitions 4/167 dead transitions. [2023-11-29 06:23:12,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 167 transitions, 1180 flow [2023-11-29 06:23:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:23:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:23:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 284 transitions. [2023-11-29 06:23:12,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2023-11-29 06:23:12,994 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 284 transitions. [2023-11-29 06:23:12,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 284 transitions. [2023-11-29 06:23:12,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:12,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 284 transitions. [2023-11-29 06:23:12,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:12,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 43.0) internal successors, (817), 19 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:12,999 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 43.0) internal successors, (817), 19 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:12,999 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 350 flow. Second operand 18 states and 284 transitions. [2023-11-29 06:23:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 167 transitions, 1180 flow [2023-11-29 06:23:13,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 167 transitions, 1146 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-29 06:23:13,013 INFO L231 Difference]: Finished difference. Result has 89 places, 109 transitions, 936 flow [2023-11-29 06:23:13,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=936, PETRI_PLACES=89, PETRI_TRANSITIONS=109} [2023-11-29 06:23:13,014 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2023-11-29 06:23:13,014 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 109 transitions, 936 flow [2023-11-29 06:23:13,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.0) internal successors, (198), 18 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:13,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:13,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:13,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:23:13,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:23:13,215 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:13,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash -232204333, now seen corresponding path program 1 times [2023-11-29 06:23:13,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:13,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188538750] [2023-11-29 06:23:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:13,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188538750] [2023-11-29 06:23:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188538750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102189182] [2023-11-29 06:23:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:13,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:13,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:13,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:13,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:23:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:13,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:23:13,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:23:13,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:23:13,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102189182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:13,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:23:13,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-29 06:23:13,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202403090] [2023-11-29 06:23:13,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:13,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:13,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:23:13,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:13,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 109 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:13,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:13,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:13,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:13,838 INFO L124 PetriNetUnfolderBase]: 1015/2055 cut-off events. [2023-11-29 06:23:13,838 INFO L125 PetriNetUnfolderBase]: For 11042/11065 co-relation queries the response was YES. [2023-11-29 06:23:13,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7551 conditions, 2055 events. 1015/2055 cut-off events. For 11042/11065 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13168 event pairs, 248 based on Foata normal form. 54/2054 useless extension candidates. Maximal degree in co-relation 6518. Up to 1049 conditions per place. [2023-11-29 06:23:13,860 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 106 selfloop transitions, 28 changer transitions 2/144 dead transitions. [2023-11-29 06:23:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 144 transitions, 1534 flow [2023-11-29 06:23:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2023-11-29 06:23:13,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2023-11-29 06:23:13,862 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 82 transitions. [2023-11-29 06:23:13,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 82 transitions. [2023-11-29 06:23:13,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:13,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 82 transitions. [2023-11-29 06:23:13,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:13,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:13,864 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:13,865 INFO L175 Difference]: Start difference. First operand has 89 places, 109 transitions, 936 flow. Second operand 4 states and 82 transitions. [2023-11-29 06:23:13,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 144 transitions, 1534 flow [2023-11-29 06:23:13,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 144 transitions, 1404 flow, removed 53 selfloop flow, removed 8 redundant places. [2023-11-29 06:23:13,903 INFO L231 Difference]: Finished difference. Result has 86 places, 129 transitions, 1176 flow [2023-11-29 06:23:13,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1176, PETRI_PLACES=86, PETRI_TRANSITIONS=129} [2023-11-29 06:23:13,904 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2023-11-29 06:23:13,904 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 129 transitions, 1176 flow [2023-11-29 06:23:13,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:13,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:13,905 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:13,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:23:14,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:23:14,110 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:14,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:14,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1618962404, now seen corresponding path program 2 times [2023-11-29 06:23:14,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:14,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407635171] [2023-11-29 06:23:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:15,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407635171] [2023-11-29 06:23:15,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407635171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:15,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125949282] [2023-11-29 06:23:15,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:15,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:15,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:23:15,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:23:15,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:15,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:23:15,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:15,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:23:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125949282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:15,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:23:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2023-11-29 06:23:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185227527] [2023-11-29 06:23:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:23:15,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:15,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 129 transitions, 1176 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:15,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:15,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:15,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:15,711 INFO L124 PetriNetUnfolderBase]: 1050/2142 cut-off events. [2023-11-29 06:23:15,711 INFO L125 PetriNetUnfolderBase]: For 11475/11515 co-relation queries the response was YES. [2023-11-29 06:23:15,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7978 conditions, 2142 events. 1050/2142 cut-off events. For 11475/11515 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13975 event pairs, 170 based on Foata normal form. 60/2148 useless extension candidates. Maximal degree in co-relation 7284. Up to 1145 conditions per place. [2023-11-29 06:23:15,727 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 126 selfloop transitions, 14 changer transitions 2/150 dead transitions. [2023-11-29 06:23:15,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 150 transitions, 1625 flow [2023-11-29 06:23:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2023-11-29 06:23:15,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2023-11-29 06:23:15,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 78 transitions. [2023-11-29 06:23:15,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 78 transitions. [2023-11-29 06:23:15,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:15,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 78 transitions. [2023-11-29 06:23:15,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:15,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:15,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:15,730 INFO L175 Difference]: Start difference. First operand has 86 places, 129 transitions, 1176 flow. Second operand 4 states and 78 transitions. [2023-11-29 06:23:15,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 150 transitions, 1625 flow [2023-11-29 06:23:15,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 150 transitions, 1575 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-29 06:23:15,757 INFO L231 Difference]: Finished difference. Result has 88 places, 130 transitions, 1191 flow [2023-11-29 06:23:15,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1191, PETRI_PLACES=88, PETRI_TRANSITIONS=130} [2023-11-29 06:23:15,758 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2023-11-29 06:23:15,758 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 130 transitions, 1191 flow [2023-11-29 06:23:15,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:15,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:15,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:15,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:23:15,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:23:15,959 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:15,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash -15329170, now seen corresponding path program 1 times [2023-11-29 06:23:15,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:15,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092111703] [2023-11-29 06:23:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:16,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092111703] [2023-11-29 06:23:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092111703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:16,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742772498] [2023-11-29 06:23:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:16,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:16,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:16,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:23:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:16,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:23:16,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:16,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742772498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:16,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-29 06:23:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890163467] [2023-11-29 06:23:16,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:16,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:23:16,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:23:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:23:16,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:16,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 130 transitions, 1191 flow. Second operand has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 18 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:16,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:16,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:16,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:16,704 INFO L124 PetriNetUnfolderBase]: 452/910 cut-off events. [2023-11-29 06:23:16,704 INFO L125 PetriNetUnfolderBase]: For 4307/4334 co-relation queries the response was YES. [2023-11-29 06:23:16,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 910 events. 452/910 cut-off events. For 4307/4334 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5035 event pairs, 294 based on Foata normal form. 10/834 useless extension candidates. Maximal degree in co-relation 3372. Up to 683 conditions per place. [2023-11-29 06:23:16,710 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 42 selfloop transitions, 12 changer transitions 18/80 dead transitions. [2023-11-29 06:23:16,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 705 flow [2023-11-29 06:23:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:23:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:23:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2023-11-29 06:23:16,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3152454780361757 [2023-11-29 06:23:16,712 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 122 transitions. [2023-11-29 06:23:16,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 122 transitions. [2023-11-29 06:23:16,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:16,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 122 transitions. [2023-11-29 06:23:16,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:16,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 43.0) internal successors, (430), 10 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:16,714 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 43.0) internal successors, (430), 10 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:16,714 INFO L175 Difference]: Start difference. First operand has 88 places, 130 transitions, 1191 flow. Second operand 9 states and 122 transitions. [2023-11-29 06:23:16,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 705 flow [2023-11-29 06:23:16,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 80 transitions, 646 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-11-29 06:23:16,721 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 461 flow [2023-11-29 06:23:16,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=461, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-11-29 06:23:16,722 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 37 predicate places. [2023-11-29 06:23:16,722 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 461 flow [2023-11-29 06:23:16,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 18 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:16,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:16,722 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:16,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 06:23:16,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:16,926 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:16,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1466889592, now seen corresponding path program 2 times [2023-11-29 06:23:16,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:16,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873224670] [2023-11-29 06:23:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:16,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:18,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873224670] [2023-11-29 06:23:18,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873224670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:18,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433440574] [2023-11-29 06:23:18,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:18,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:18,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:18,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:18,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:23:18,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:23:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:18,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:23:18,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 06:23:18,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:23:18,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433440574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:18,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:23:18,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-11-29 06:23:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334801170] [2023-11-29 06:23:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:18,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:18,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:23:18,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:18,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:18,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:18,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:18,379 INFO L124 PetriNetUnfolderBase]: 379/800 cut-off events. [2023-11-29 06:23:18,379 INFO L125 PetriNetUnfolderBase]: For 2792/2820 co-relation queries the response was YES. [2023-11-29 06:23:18,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 800 events. 379/800 cut-off events. For 2792/2820 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4361 event pairs, 77 based on Foata normal form. 28/795 useless extension candidates. Maximal degree in co-relation 2715. Up to 273 conditions per place. [2023-11-29 06:23:18,384 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 59 selfloop transitions, 10 changer transitions 2/79 dead transitions. [2023-11-29 06:23:18,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 699 flow [2023-11-29 06:23:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2023-11-29 06:23:18,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2023-11-29 06:23:18,385 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 77 transitions. [2023-11-29 06:23:18,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 77 transitions. [2023-11-29 06:23:18,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:18,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 77 transitions. [2023-11-29 06:23:18,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,387 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 461 flow. Second operand 4 states and 77 transitions. [2023-11-29 06:23:18,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 699 flow [2023-11-29 06:23:18,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 669 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-29 06:23:18,392 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 464 flow [2023-11-29 06:23:18,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=464, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-11-29 06:23:18,393 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2023-11-29 06:23:18,393 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 464 flow [2023-11-29 06:23:18,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:18,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:18,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:23:18,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:23:18,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:18,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1991662125, now seen corresponding path program 2 times [2023-11-29 06:23:18,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:18,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087656150] [2023-11-29 06:23:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:18,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:23:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087656150] [2023-11-29 06:23:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087656150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:23:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771621389] [2023-11-29 06:23:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:23:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:23:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:23:18,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:23:18,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:18,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:23:18,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:18,913 INFO L124 PetriNetUnfolderBase]: 747/1398 cut-off events. [2023-11-29 06:23:18,913 INFO L125 PetriNetUnfolderBase]: For 5996/5996 co-relation queries the response was YES. [2023-11-29 06:23:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5156 conditions, 1398 events. 747/1398 cut-off events. For 5996/5996 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7548 event pairs, 87 based on Foata normal form. 76/1470 useless extension candidates. Maximal degree in co-relation 5138. Up to 634 conditions per place. [2023-11-29 06:23:18,925 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 72 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-11-29 06:23:18,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 796 flow [2023-11-29 06:23:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:23:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:23:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2023-11-29 06:23:18,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2023-11-29 06:23:18,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 66 transitions. [2023-11-29 06:23:18,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 66 transitions. [2023-11-29 06:23:18,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:18,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 66 transitions. [2023-11-29 06:23:18,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,929 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 464 flow. Second operand 4 states and 66 transitions. [2023-11-29 06:23:18,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 796 flow [2023-11-29 06:23:18,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 764 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:23:18,935 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 467 flow [2023-11-29 06:23:18,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=467, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-11-29 06:23:18,936 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 29 predicate places. [2023-11-29 06:23:18,936 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 467 flow [2023-11-29 06:23:18,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:18,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:18,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 06:23:18,937 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:18,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash 921592691, now seen corresponding path program 1 times [2023-11-29 06:23:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:18,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431145217] [2023-11-29 06:23:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:19,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431145217] [2023-11-29 06:23:19,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431145217] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:19,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779652596] [2023-11-29 06:23:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:19,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:19,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:19,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:20,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:23:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:20,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 06:23:20,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:20,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:20,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:20,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 06:23:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:21,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779652596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:21,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:21,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-11-29 06:23:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236812546] [2023-11-29 06:23:21,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:21,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:23:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:23:21,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:23:21,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:21,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 467 flow. Second operand has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:21,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:21,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:21,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:24,268 INFO L124 PetriNetUnfolderBase]: 1620/3335 cut-off events. [2023-11-29 06:23:24,268 INFO L125 PetriNetUnfolderBase]: For 17502/17558 co-relation queries the response was YES. [2023-11-29 06:23:24,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12471 conditions, 3335 events. 1620/3335 cut-off events. For 17502/17558 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22815 event pairs, 153 based on Foata normal form. 126/3415 useless extension candidates. Maximal degree in co-relation 12451. Up to 955 conditions per place. [2023-11-29 06:23:24,284 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 157 selfloop transitions, 127 changer transitions 6/299 dead transitions. [2023-11-29 06:23:24,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 299 transitions, 2727 flow [2023-11-29 06:23:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:23:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 06:23:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 573 transitions. [2023-11-29 06:23:24,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015084852294155 [2023-11-29 06:23:24,288 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 573 transitions. [2023-11-29 06:23:24,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 573 transitions. [2023-11-29 06:23:24,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:24,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 573 transitions. [2023-11-29 06:23:24,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 15.486486486486486) internal successors, (573), 37 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:24,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 43.0) internal successors, (1634), 38 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:24,295 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 43.0) internal successors, (1634), 38 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:24,295 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 467 flow. Second operand 37 states and 573 transitions. [2023-11-29 06:23:24,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 299 transitions, 2727 flow [2023-11-29 06:23:24,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 299 transitions, 2721 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 06:23:24,309 INFO L231 Difference]: Finished difference. Result has 124 places, 189 transitions, 2387 flow [2023-11-29 06:23:24,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2387, PETRI_PLACES=124, PETRI_TRANSITIONS=189} [2023-11-29 06:23:24,310 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 84 predicate places. [2023-11-29 06:23:24,310 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 189 transitions, 2387 flow [2023-11-29 06:23:24,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:24,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:24,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:24,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:23:24,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:23:24,511 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:24,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1991661070, now seen corresponding path program 1 times [2023-11-29 06:23:24,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:24,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860919469] [2023-11-29 06:23:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:25,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860919469] [2023-11-29 06:23:25,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860919469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:25,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297208822] [2023-11-29 06:23:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:25,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:25,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:25,036 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:25,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:23:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:25,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 06:23:25,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:25,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:25,857 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 06:23:25,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2023-11-29 06:23:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:26,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297208822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:26,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-11-29 06:23:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650525068] [2023-11-29 06:23:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:26,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:23:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:26,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:23:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:23:26,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:26,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 189 transitions, 2387 flow. Second operand has 33 states, 33 states have (on average 10.606060606060606) internal successors, (350), 33 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:26,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:26,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:29,830 INFO L124 PetriNetUnfolderBase]: 2580/5389 cut-off events. [2023-11-29 06:23:29,830 INFO L125 PetriNetUnfolderBase]: For 94208/94598 co-relation queries the response was YES. [2023-11-29 06:23:29,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27616 conditions, 5389 events. 2580/5389 cut-off events. For 94208/94598 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 39498 event pairs, 463 based on Foata normal form. 202/5528 useless extension candidates. Maximal degree in co-relation 27576. Up to 1527 conditions per place. [2023-11-29 06:23:29,871 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 209 selfloop transitions, 219 changer transitions 2/439 dead transitions. [2023-11-29 06:23:29,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 439 transitions, 6060 flow [2023-11-29 06:23:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 06:23:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 06:23:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 601 transitions. [2023-11-29 06:23:29,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494186046511628 [2023-11-29 06:23:29,874 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 601 transitions. [2023-11-29 06:23:29,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 601 transitions. [2023-11-29 06:23:29,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:29,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 601 transitions. [2023-11-29 06:23:29,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 15.025) internal successors, (601), 40 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:29,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 43.0) internal successors, (1763), 41 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:29,879 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 43.0) internal successors, (1763), 41 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:29,879 INFO L175 Difference]: Start difference. First operand has 124 places, 189 transitions, 2387 flow. Second operand 40 states and 601 transitions. [2023-11-29 06:23:29,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 439 transitions, 6060 flow [2023-11-29 06:23:30,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 439 transitions, 5187 flow, removed 421 selfloop flow, removed 12 redundant places. [2023-11-29 06:23:30,010 INFO L231 Difference]: Finished difference. Result has 167 places, 308 transitions, 4546 flow [2023-11-29 06:23:30,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4546, PETRI_PLACES=167, PETRI_TRANSITIONS=308} [2023-11-29 06:23:30,010 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 127 predicate places. [2023-11-29 06:23:30,010 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 308 transitions, 4546 flow [2023-11-29 06:23:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.606060606060606) internal successors, (350), 33 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:30,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:30,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:30,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:23:30,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:23:30,211 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:30,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1741225090, now seen corresponding path program 2 times [2023-11-29 06:23:30,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:30,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145410820] [2023-11-29 06:23:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:30,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:31,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:31,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145410820] [2023-11-29 06:23:31,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145410820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:31,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469097319] [2023-11-29 06:23:31,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:31,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:31,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:31,074 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:31,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:23:31,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:23:31,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:31,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 06:23:31,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:31,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:32,134 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 06:23:32,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2023-11-29 06:23:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469097319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:33,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-11-29 06:23:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263103401] [2023-11-29 06:23:33,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:33,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:23:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:23:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:23:33,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:33,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 308 transitions, 4546 flow. Second operand has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:33,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:33,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:33,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:36,463 INFO L124 PetriNetUnfolderBase]: 1946/4105 cut-off events. [2023-11-29 06:23:36,463 INFO L125 PetriNetUnfolderBase]: For 111776/112376 co-relation queries the response was YES. [2023-11-29 06:23:36,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22472 conditions, 4105 events. 1946/4105 cut-off events. For 111776/112376 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 26978 event pairs, 441 based on Foata normal form. 442/4510 useless extension candidates. Maximal degree in co-relation 22418. Up to 943 conditions per place. [2023-11-29 06:23:36,494 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 153 changer transitions 8/319 dead transitions. [2023-11-29 06:23:36,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 319 transitions, 4883 flow [2023-11-29 06:23:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:23:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:23:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 436 transitions. [2023-11-29 06:23:36,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496391339214114 [2023-11-29 06:23:36,497 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 436 transitions. [2023-11-29 06:23:36,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 436 transitions. [2023-11-29 06:23:36,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:36,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 436 transitions. [2023-11-29 06:23:36,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 15.03448275862069) internal successors, (436), 29 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:36,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 43.0) internal successors, (1290), 30 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:36,501 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 43.0) internal successors, (1290), 30 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:36,501 INFO L175 Difference]: Start difference. First operand has 167 places, 308 transitions, 4546 flow. Second operand 29 states and 436 transitions. [2023-11-29 06:23:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 319 transitions, 4883 flow [2023-11-29 06:23:36,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 319 transitions, 3721 flow, removed 550 selfloop flow, removed 19 redundant places. [2023-11-29 06:23:36,651 INFO L231 Difference]: Finished difference. Result has 174 places, 237 transitions, 3412 flow [2023-11-29 06:23:36,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3412, PETRI_PLACES=174, PETRI_TRANSITIONS=237} [2023-11-29 06:23:36,652 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 134 predicate places. [2023-11-29 06:23:36,652 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 237 transitions, 3412 flow [2023-11-29 06:23:36,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:36,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:36,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:36,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:23:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:36,853 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:36,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1741225091, now seen corresponding path program 2 times [2023-11-29 06:23:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:36,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638692637] [2023-11-29 06:23:36,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:36,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:37,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:37,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638692637] [2023-11-29 06:23:37,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638692637] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:37,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342218211] [2023-11-29 06:23:37,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:23:37,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:37,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:37,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:23:37,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:23:37,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:37,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:23:37,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:38,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:38,822 INFO L349 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-11-29 06:23:38,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2023-11-29 06:23:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:39,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342218211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:39,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-11-29 06:23:39,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95468887] [2023-11-29 06:23:39,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:39,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:23:39,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:39,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:23:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:23:40,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:40,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 237 transitions, 3412 flow. Second operand has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:40,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:40,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:40,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:43,600 INFO L124 PetriNetUnfolderBase]: 2052/4367 cut-off events. [2023-11-29 06:23:43,600 INFO L125 PetriNetUnfolderBase]: For 82758/83250 co-relation queries the response was YES. [2023-11-29 06:23:43,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21403 conditions, 4367 events. 2052/4367 cut-off events. For 82758/83250 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 28054 event pairs, 479 based on Foata normal form. 328/4656 useless extension candidates. Maximal degree in co-relation 21345. Up to 806 conditions per place. [2023-11-29 06:23:43,628 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 166 selfloop transitions, 185 changer transitions 13/373 dead transitions. [2023-11-29 06:23:43,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 373 transitions, 5228 flow [2023-11-29 06:23:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:23:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 06:23:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 479 transitions. [2023-11-29 06:23:43,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33756166314305847 [2023-11-29 06:23:43,631 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 479 transitions. [2023-11-29 06:23:43,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 479 transitions. [2023-11-29 06:23:43,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:43,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 479 transitions. [2023-11-29 06:23:43,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 14.515151515151516) internal successors, (479), 33 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 43.0) internal successors, (1462), 34 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,634 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 43.0) internal successors, (1462), 34 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,634 INFO L175 Difference]: Start difference. First operand has 174 places, 237 transitions, 3412 flow. Second operand 33 states and 479 transitions. [2023-11-29 06:23:43,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 373 transitions, 5228 flow [2023-11-29 06:23:43,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 373 transitions, 4615 flow, removed 279 selfloop flow, removed 19 redundant places. [2023-11-29 06:23:43,798 INFO L231 Difference]: Finished difference. Result has 190 places, 272 transitions, 3940 flow [2023-11-29 06:23:43,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3940, PETRI_PLACES=190, PETRI_TRANSITIONS=272} [2023-11-29 06:23:43,799 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 150 predicate places. [2023-11-29 06:23:43,799 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 272 transitions, 3940 flow [2023-11-29 06:23:43,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.588235294117647) internal successors, (360), 34 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:43,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:43,800 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:43,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:23:44,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:44,001 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:44,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash -601776145, now seen corresponding path program 3 times [2023-11-29 06:23:44,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:44,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271436755] [2023-11-29 06:23:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:44,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:45,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:45,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271436755] [2023-11-29 06:23:45,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271436755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:45,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85048815] [2023-11-29 06:23:45,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:23:45,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:45,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:45,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:45,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:23:45,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:23:45,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:45,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:23:45,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:45,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:45,739 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:23:45,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 06:23:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85048815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:45,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:45,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2023-11-29 06:23:45,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723059983] [2023-11-29 06:23:45,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:45,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:23:45,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:45,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:23:45,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:23:45,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:45,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 272 transitions, 3940 flow. Second operand has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:45,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:45,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:45,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:47,393 INFO L124 PetriNetUnfolderBase]: 2383/5106 cut-off events. [2023-11-29 06:23:47,393 INFO L125 PetriNetUnfolderBase]: For 79980/80388 co-relation queries the response was YES. [2023-11-29 06:23:47,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 5106 events. 2383/5106 cut-off events. For 79980/80388 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 33626 event pairs, 395 based on Foata normal form. 282/5349 useless extension candidates. Maximal degree in co-relation 23621. Up to 1737 conditions per place. [2023-11-29 06:23:47,427 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 258 selfloop transitions, 124 changer transitions 10/401 dead transitions. [2023-11-29 06:23:47,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 401 transitions, 6346 flow [2023-11-29 06:23:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:23:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:23:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 306 transitions. [2023-11-29 06:23:47,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3388704318936877 [2023-11-29 06:23:47,429 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 306 transitions. [2023-11-29 06:23:47,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 306 transitions. [2023-11-29 06:23:47,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:47,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 306 transitions. [2023-11-29 06:23:47,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 14.571428571428571) internal successors, (306), 21 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:47,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 43.0) internal successors, (946), 22 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:47,433 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 43.0) internal successors, (946), 22 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:47,433 INFO L175 Difference]: Start difference. First operand has 190 places, 272 transitions, 3940 flow. Second operand 21 states and 306 transitions. [2023-11-29 06:23:47,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 401 transitions, 6346 flow [2023-11-29 06:23:47,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 401 transitions, 5697 flow, removed 188 selfloop flow, removed 23 redundant places. [2023-11-29 06:23:47,563 INFO L231 Difference]: Finished difference. Result has 189 places, 303 transitions, 4385 flow [2023-11-29 06:23:47,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4385, PETRI_PLACES=189, PETRI_TRANSITIONS=303} [2023-11-29 06:23:47,563 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 149 predicate places. [2023-11-29 06:23:47,564 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 303 transitions, 4385 flow [2023-11-29 06:23:47,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:47,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:47,564 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:47,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:23:47,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:47,765 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:47,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash 779937388, now seen corresponding path program 3 times [2023-11-29 06:23:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:47,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43907108] [2023-11-29 06:23:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:49,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:49,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43907108] [2023-11-29 06:23:49,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43907108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:49,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452447280] [2023-11-29 06:23:49,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:23:49,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:49,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:49,132 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:49,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:23:49,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:23:49,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:49,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:23:49,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:49,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:49,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:49,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 06:23:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452447280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:49,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:49,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 20 [2023-11-29 06:23:49,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880634548] [2023-11-29 06:23:49,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:23:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:23:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:23:49,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:49,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 303 transitions, 4385 flow. Second operand has 22 states, 22 states have (on average 11.363636363636363) internal successors, (250), 22 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:49,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:49,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:49,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:51,372 INFO L124 PetriNetUnfolderBase]: 2563/5502 cut-off events. [2023-11-29 06:23:51,373 INFO L125 PetriNetUnfolderBase]: For 75822/76266 co-relation queries the response was YES. [2023-11-29 06:23:51,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25491 conditions, 5502 events. 2563/5502 cut-off events. For 75822/76266 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 37174 event pairs, 591 based on Foata normal form. 140/5566 useless extension candidates. Maximal degree in co-relation 25431. Up to 3189 conditions per place. [2023-11-29 06:23:51,410 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 302 selfloop transitions, 57 changer transitions 14/382 dead transitions. [2023-11-29 06:23:51,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 382 transitions, 5800 flow [2023-11-29 06:23:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:23:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:23:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 317 transitions. [2023-11-29 06:23:51,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33509513742071884 [2023-11-29 06:23:51,412 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 317 transitions. [2023-11-29 06:23:51,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 317 transitions. [2023-11-29 06:23:51,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:51,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 317 transitions. [2023-11-29 06:23:51,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 14.409090909090908) internal successors, (317), 22 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:51,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 43.0) internal successors, (989), 23 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:51,414 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 43.0) internal successors, (989), 23 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:51,414 INFO L175 Difference]: Start difference. First operand has 189 places, 303 transitions, 4385 flow. Second operand 22 states and 317 transitions. [2023-11-29 06:23:51,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 382 transitions, 5800 flow [2023-11-29 06:23:51,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 382 transitions, 5548 flow, removed 51 selfloop flow, removed 11 redundant places. [2023-11-29 06:23:51,609 INFO L231 Difference]: Finished difference. Result has 205 places, 317 transitions, 4576 flow [2023-11-29 06:23:51,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4576, PETRI_PLACES=205, PETRI_TRANSITIONS=317} [2023-11-29 06:23:51,610 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2023-11-29 06:23:51,610 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 317 transitions, 4576 flow [2023-11-29 06:23:51,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.363636363636363) internal successors, (250), 22 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:51,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:51,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:51,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:23:51,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:51,811 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:51,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1030373368, now seen corresponding path program 4 times [2023-11-29 06:23:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708442765] [2023-11-29 06:23:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:51,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:53,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:53,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708442765] [2023-11-29 06:23:53,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708442765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:53,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629790015] [2023-11-29 06:23:53,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:23:53,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:53,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:53,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:53,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:23:53,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:23:53,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:53,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:23:53,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:53,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:53,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:53,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 06:23:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:53,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629790015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:53,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:53,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 4] total 24 [2023-11-29 06:23:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877439800] [2023-11-29 06:23:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:23:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:53,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:23:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:23:53,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:53,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 317 transitions, 4576 flow. Second operand has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:53,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:53,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:53,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:55,687 INFO L124 PetriNetUnfolderBase]: 2623/5622 cut-off events. [2023-11-29 06:23:55,687 INFO L125 PetriNetUnfolderBase]: For 79624/80072 co-relation queries the response was YES. [2023-11-29 06:23:55,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26281 conditions, 5622 events. 2623/5622 cut-off events. For 79624/80072 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38275 event pairs, 655 based on Foata normal form. 144/5694 useless extension candidates. Maximal degree in co-relation 26215. Up to 3287 conditions per place. [2023-11-29 06:23:55,722 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 49 changer transitions 10/373 dead transitions. [2023-11-29 06:23:55,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 373 transitions, 5717 flow [2023-11-29 06:23:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:23:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:23:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 272 transitions. [2023-11-29 06:23:55,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329253365973072 [2023-11-29 06:23:55,723 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 272 transitions. [2023-11-29 06:23:55,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 272 transitions. [2023-11-29 06:23:55,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:55,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 272 transitions. [2023-11-29 06:23:55,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 14.31578947368421) internal successors, (272), 19 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:55,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 43.0) internal successors, (860), 20 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:55,726 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 43.0) internal successors, (860), 20 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:55,726 INFO L175 Difference]: Start difference. First operand has 205 places, 317 transitions, 4576 flow. Second operand 19 states and 272 transitions. [2023-11-29 06:23:55,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 373 transitions, 5717 flow [2023-11-29 06:23:55,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 373 transitions, 5438 flow, removed 92 selfloop flow, removed 13 redundant places. [2023-11-29 06:23:55,925 INFO L231 Difference]: Finished difference. Result has 211 places, 317 transitions, 4431 flow [2023-11-29 06:23:55,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4431, PETRI_PLACES=211, PETRI_TRANSITIONS=317} [2023-11-29 06:23:55,926 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 171 predicate places. [2023-11-29 06:23:55,926 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 317 transitions, 4431 flow [2023-11-29 06:23:55,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:55,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:55,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:55,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:23:56,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:56,127 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:56,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1030373369, now seen corresponding path program 4 times [2023-11-29 06:23:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:56,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333876398] [2023-11-29 06:23:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:56,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:56,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333876398] [2023-11-29 06:23:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333876398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:56,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353418320] [2023-11-29 06:23:56,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:23:56,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:56,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:56,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:23:57,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:23:57,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:57,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:23:57,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:23:57,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:57,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:23:57,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 06:23:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353418320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:57,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:57,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 4] total 24 [2023-11-29 06:23:57,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42568368] [2023-11-29 06:23:57,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:57,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:23:57,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:23:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:23:57,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:23:57,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 317 transitions, 4431 flow. Second operand has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:57,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:57,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:23:57,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:59,173 INFO L124 PetriNetUnfolderBase]: 2591/5566 cut-off events. [2023-11-29 06:23:59,173 INFO L125 PetriNetUnfolderBase]: For 74618/75066 co-relation queries the response was YES. [2023-11-29 06:23:59,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25398 conditions, 5566 events. 2591/5566 cut-off events. For 74618/75066 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 37875 event pairs, 559 based on Foata normal form. 258/5790 useless extension candidates. Maximal degree in co-relation 25332. Up to 2693 conditions per place. [2023-11-29 06:23:59,210 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 267 selfloop transitions, 85 changer transitions 12/373 dead transitions. [2023-11-29 06:23:59,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 373 transitions, 5479 flow [2023-11-29 06:23:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:23:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:23:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 270 transitions. [2023-11-29 06:23:59,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33047735618115054 [2023-11-29 06:23:59,212 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 270 transitions. [2023-11-29 06:23:59,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 270 transitions. [2023-11-29 06:23:59,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:59,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 270 transitions. [2023-11-29 06:23:59,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 14.210526315789474) internal successors, (270), 19 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:59,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 43.0) internal successors, (860), 20 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:59,214 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 43.0) internal successors, (860), 20 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:59,214 INFO L175 Difference]: Start difference. First operand has 211 places, 317 transitions, 4431 flow. Second operand 19 states and 270 transitions. [2023-11-29 06:23:59,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 373 transitions, 5479 flow [2023-11-29 06:23:59,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 373 transitions, 5340 flow, removed 22 selfloop flow, removed 16 redundant places. [2023-11-29 06:23:59,358 INFO L231 Difference]: Finished difference. Result has 213 places, 315 transitions, 4407 flow [2023-11-29 06:23:59,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4407, PETRI_PLACES=213, PETRI_TRANSITIONS=315} [2023-11-29 06:23:59,359 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 173 predicate places. [2023-11-29 06:23:59,359 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 315 transitions, 4407 flow [2023-11-29 06:23:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 11.153846153846153) internal successors, (290), 26 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:59,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:59,360 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:59,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:23:59,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:23:59,560 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:23:59,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash -277670466, now seen corresponding path program 5 times [2023-11-29 06:23:59,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:59,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202908636] [2023-11-29 06:23:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:59,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:23:59,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:59,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202908636] [2023-11-29 06:23:59,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202908636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:23:59,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622053813] [2023-11-29 06:23:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:23:59,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:23:59,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:23:59,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:23:59,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:23:59,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:23:59,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:23:59,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:23:59,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:23:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:23:59,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:23:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:23:59,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622053813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:23:59,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:23:59,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 8 [2023-11-29 06:23:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590849455] [2023-11-29 06:23:59,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:23:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:23:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:23:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:23:59,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2023-11-29 06:23:59,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 315 transitions, 4407 flow. Second operand has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:59,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:59,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2023-11-29 06:23:59,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:24:01,556 INFO L124 PetriNetUnfolderBase]: 3554/7525 cut-off events. [2023-11-29 06:24:01,556 INFO L125 PetriNetUnfolderBase]: For 118550/119292 co-relation queries the response was YES. [2023-11-29 06:24:01,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36034 conditions, 7525 events. 3554/7525 cut-off events. For 118550/119292 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 54704 event pairs, 701 based on Foata normal form. 332/7757 useless extension candidates. Maximal degree in co-relation 35967. Up to 2747 conditions per place. [2023-11-29 06:24:01,619 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 279 selfloop transitions, 173 changer transitions 5/466 dead transitions. [2023-11-29 06:24:01,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 466 transitions, 7542 flow [2023-11-29 06:24:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:24:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:24:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2023-11-29 06:24:01,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2023-11-29 06:24:01,621 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2023-11-29 06:24:01,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2023-11-29 06:24:01,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:01,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2023-11-29 06:24:01,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:01,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:01,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:01,622 INFO L175 Difference]: Start difference. First operand has 213 places, 315 transitions, 4407 flow. Second operand 5 states and 103 transitions. [2023-11-29 06:24:01,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 466 transitions, 7542 flow [2023-11-29 06:24:01,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 466 transitions, 7255 flow, removed 55 selfloop flow, removed 22 redundant places. [2023-11-29 06:24:01,845 INFO L231 Difference]: Finished difference. Result has 197 places, 398 transitions, 6091 flow [2023-11-29 06:24:01,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6091, PETRI_PLACES=197, PETRI_TRANSITIONS=398} [2023-11-29 06:24:01,846 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 157 predicate places. [2023-11-29 06:24:01,847 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 398 transitions, 6091 flow [2023-11-29 06:24:01,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.5) internal successors, (145), 10 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:01,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:24:01,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:01,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:24:02,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:02,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:24:02,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1387817444, now seen corresponding path program 5 times [2023-11-29 06:24:02,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:02,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133236265] [2023-11-29 06:24:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:03,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133236265] [2023-11-29 06:24:03,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133236265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035536738] [2023-11-29 06:24:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:24:03,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:03,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:03,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:03,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:24:03,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:24:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:03,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:24:03,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:03,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:04,437 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-11-29 06:24:04,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 106 [2023-11-29 06:24:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:05,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035536738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:05,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:05,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2023-11-29 06:24:05,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300270155] [2023-11-29 06:24:05,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:05,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 06:24:05,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 06:24:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 06:24:05,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:24:05,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 398 transitions, 6091 flow. Second operand has 46 states, 46 states have (on average 10.565217391304348) internal successors, (486), 46 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:05,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:24:05,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:24:05,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:24:16,853 INFO L124 PetriNetUnfolderBase]: 7518/15833 cut-off events. [2023-11-29 06:24:16,854 INFO L125 PetriNetUnfolderBase]: For 404068/405772 co-relation queries the response was YES. [2023-11-29 06:24:16,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86630 conditions, 15833 events. 7518/15833 cut-off events. For 404068/405772 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 134401 event pairs, 747 based on Foata normal form. 988/16639 useless extension candidates. Maximal degree in co-relation 86562. Up to 2665 conditions per place. [2023-11-29 06:24:16,970 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 417 selfloop transitions, 709 changer transitions 16/1151 dead transitions. [2023-11-29 06:24:16,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1151 transitions, 18869 flow [2023-11-29 06:24:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 06:24:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-29 06:24:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 1325 transitions. [2023-11-29 06:24:16,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541833734295643 [2023-11-29 06:24:16,974 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 1325 transitions. [2023-11-29 06:24:16,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 1325 transitions. [2023-11-29 06:24:16,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:16,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 1325 transitions. [2023-11-29 06:24:16,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 15.229885057471265) internal successors, (1325), 87 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:16,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 43.0) internal successors, (3784), 88 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:16,984 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 43.0) internal successors, (3784), 88 states have internal predecessors, (3784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:16,984 INFO L175 Difference]: Start difference. First operand has 197 places, 398 transitions, 6091 flow. Second operand 87 states and 1325 transitions. [2023-11-29 06:24:16,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1151 transitions, 18869 flow [2023-11-29 06:24:17,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1151 transitions, 18577 flow, removed 146 selfloop flow, removed 1 redundant places. [2023-11-29 06:24:17,537 INFO L231 Difference]: Finished difference. Result has 302 places, 856 transitions, 17097 flow [2023-11-29 06:24:17,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=17097, PETRI_PLACES=302, PETRI_TRANSITIONS=856} [2023-11-29 06:24:17,538 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 262 predicate places. [2023-11-29 06:24:17,538 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 856 transitions, 17097 flow [2023-11-29 06:24:17,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 10.565217391304348) internal successors, (486), 46 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:17,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:24:17,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:17,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:24:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:24:17,739 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:24:17,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1636521133, now seen corresponding path program 6 times [2023-11-29 06:24:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:17,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558396921] [2023-11-29 06:24:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:18,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558396921] [2023-11-29 06:24:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558396921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103152379] [2023-11-29 06:24:18,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:24:18,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:18,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:18,251 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:18,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:24:18,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:24:18,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:18,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:24:18,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:24:18,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:18,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:24:18,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 107 [2023-11-29 06:24:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:24:19,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103152379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:19,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:19,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 26 [2023-11-29 06:24:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868292798] [2023-11-29 06:24:19,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:24:19,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:24:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:24:19,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:24:19,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 856 transitions, 17097 flow. Second operand has 28 states, 28 states have (on average 11.285714285714286) internal successors, (316), 28 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:24:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:24:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:24:44,910 INFO L124 PetriNetUnfolderBase]: 21512/45457 cut-off events. [2023-11-29 06:24:44,910 INFO L125 PetriNetUnfolderBase]: For 2147176/2152296 co-relation queries the response was YES. [2023-11-29 06:24:45,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272747 conditions, 45457 events. 21512/45457 cut-off events. For 2147176/2152296 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 446984 event pairs, 2921 based on Foata normal form. 3688/48471 useless extension candidates. Maximal degree in co-relation 272657. Up to 7605 conditions per place. [2023-11-29 06:24:45,527 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 1161 selfloop transitions, 1934 changer transitions 6/3110 dead transitions. [2023-11-29 06:24:45,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 3110 transitions, 65825 flow [2023-11-29 06:24:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 06:24:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2023-11-29 06:24:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 1804 transitions. [2023-11-29 06:24:45,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712698086025931 [2023-11-29 06:24:45,533 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 1804 transitions. [2023-11-29 06:24:45,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 1804 transitions. [2023-11-29 06:24:45,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:45,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 1804 transitions. [2023-11-29 06:24:45,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 15.964601769911505) internal successors, (1804), 113 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:45,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 43.0) internal successors, (4902), 114 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:45,549 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 43.0) internal successors, (4902), 114 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:45,549 INFO L175 Difference]: Start difference. First operand has 302 places, 856 transitions, 17097 flow. Second operand 113 states and 1804 transitions. [2023-11-29 06:24:45,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 3110 transitions, 65825 flow [2023-11-29 06:24:57,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 3110 transitions, 52719 flow, removed 6524 selfloop flow, removed 16 redundant places. [2023-11-29 06:24:57,947 INFO L231 Difference]: Finished difference. Result has 482 places, 2486 transitions, 49057 flow [2023-11-29 06:24:57,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13146, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=49057, PETRI_PLACES=482, PETRI_TRANSITIONS=2486} [2023-11-29 06:24:57,948 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 442 predicate places. [2023-11-29 06:24:57,948 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 2486 transitions, 49057 flow [2023-11-29 06:24:57,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.285714285714286) internal successors, (316), 28 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:57,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:24:57,949 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:57,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:24:58,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:24:58,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:24:58,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1417483814, now seen corresponding path program 6 times [2023-11-29 06:24:58,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:58,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293046704] [2023-11-29 06:24:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:58,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:58,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293046704] [2023-11-29 06:24:58,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293046704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:58,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498219507] [2023-11-29 06:24:58,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:24:58,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:58,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:58,741 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:58,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:24:58,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 06:24:58,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:58,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 06:24:58,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:24:59,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:59,795 INFO L349 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-11-29 06:24:59,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 76 [2023-11-29 06:25:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:25:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498219507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:25:00,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:25:00,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 6] total 30 [2023-11-29 06:25:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284233943] [2023-11-29 06:25:00,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:25:00,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:25:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:00,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:25:00,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:25:00,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:25:00,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 2486 transitions, 49057 flow. Second operand has 32 states, 32 states have (on average 11.125) internal successors, (356), 32 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:00,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:25:00,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:25:00,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:25:59,596 INFO L124 PetriNetUnfolderBase]: 37078/79527 cut-off events. [2023-11-29 06:25:59,596 INFO L125 PetriNetUnfolderBase]: For 5204465/5210415 co-relation queries the response was YES. [2023-11-29 06:26:01,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489883 conditions, 79527 events. 37078/79527 cut-off events. For 5204465/5210415 co-relation queries the response was YES. Maximal size of possible extension queue 1459. Compared 830282 event pairs, 6285 based on Foata normal form. 2514/80946 useless extension candidates. Maximal degree in co-relation 489704. Up to 26697 conditions per place. [2023-11-29 06:26:01,667 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 2396 selfloop transitions, 2660 changer transitions 38/5103 dead transitions. [2023-11-29 06:26:01,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 5103 transitions, 109959 flow [2023-11-29 06:26:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 06:26:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-29 06:26:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1107 transitions. [2023-11-29 06:26:01,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36259416966917785 [2023-11-29 06:26:01,670 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 1107 transitions. [2023-11-29 06:26:01,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 1107 transitions. [2023-11-29 06:26:01,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:26:01,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 1107 transitions. [2023-11-29 06:26:01,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 15.591549295774648) internal successors, (1107), 71 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:01,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 43.0) internal successors, (3096), 72 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:01,677 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 43.0) internal successors, (3096), 72 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:26:01,677 INFO L175 Difference]: Start difference. First operand has 482 places, 2486 transitions, 49057 flow. Second operand 71 states and 1107 transitions. [2023-11-29 06:26:01,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 5103 transitions, 109959 flow [2023-11-29 06:27:11,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 5103 transitions, 96074 flow, removed 6868 selfloop flow, removed 8 redundant places. [2023-11-29 06:27:11,901 INFO L231 Difference]: Finished difference. Result has 588 places, 4526 transitions, 92164 flow [2023-11-29 06:27:11,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=42790, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=931, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=92164, PETRI_PLACES=588, PETRI_TRANSITIONS=4526} [2023-11-29 06:27:11,903 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 548 predicate places. [2023-11-29 06:27:11,903 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 4526 transitions, 92164 flow [2023-11-29 06:27:11,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.125) internal successors, (356), 32 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:27:11,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:27:11,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:11,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:27:12,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:27:12,104 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:27:12,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1592180294, now seen corresponding path program 7 times [2023-11-29 06:27:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862195486] [2023-11-29 06:27:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:27:12,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:12,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862195486] [2023-11-29 06:27:12,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862195486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:27:12,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906996029] [2023-11-29 06:27:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:27:12,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:12,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:12,853 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:12,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:27:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:12,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 06:27:12,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:27:13,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:27:14,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:27:14,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 106 [2023-11-29 06:27:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:27:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906996029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:27:14,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:27:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-29 06:27:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45880059] [2023-11-29 06:27:14,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:27:14,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 06:27:14,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:14,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 06:27:14,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1817, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 06:27:15,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:27:15,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 4526 transitions, 92164 flow. Second operand has 47 states, 47 states have (on average 10.53191489361702) internal successors, (495), 47 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:27:15,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:27:15,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:27:15,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:29:08,351 INFO L124 PetriNetUnfolderBase]: 41802/89645 cut-off events. [2023-11-29 06:29:08,351 INFO L125 PetriNetUnfolderBase]: For 7323889/7332923 co-relation queries the response was YES. [2023-11-29 06:29:10,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582866 conditions, 89645 events. 41802/89645 cut-off events. For 7323889/7332923 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 932386 event pairs, 4221 based on Foata normal form. 6178/94824 useless extension candidates. Maximal degree in co-relation 582644. Up to 15379 conditions per place. [2023-11-29 06:29:11,005 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 1411 selfloop transitions, 4074 changer transitions 36/5530 dead transitions. [2023-11-29 06:29:11,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 5530 transitions, 126799 flow [2023-11-29 06:29:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 06:29:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 06:29:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1020 transitions. [2023-11-29 06:29:11,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35404373481430057 [2023-11-29 06:29:11,009 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 1020 transitions. [2023-11-29 06:29:11,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 1020 transitions. [2023-11-29 06:29:11,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:29:11,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 1020 transitions. [2023-11-29 06:29:11,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 15.223880597014926) internal successors, (1020), 67 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:11,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 43.0) internal successors, (2924), 68 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:11,014 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 43.0) internal successors, (2924), 68 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:29:11,014 INFO L175 Difference]: Start difference. First operand has 588 places, 4526 transitions, 92164 flow. Second operand 67 states and 1020 transitions. [2023-11-29 06:29:11,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 5530 transitions, 126799 flow [2023-11-29 06:31:48,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 5530 transitions, 116853 flow, removed 4721 selfloop flow, removed 30 redundant places. [2023-11-29 06:31:48,223 INFO L231 Difference]: Finished difference. Result has 649 places, 5086 transitions, 113469 flow [2023-11-29 06:31:48,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72812, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2812, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=113469, PETRI_PLACES=649, PETRI_TRANSITIONS=5086} [2023-11-29 06:31:48,226 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 609 predicate places. [2023-11-29 06:31:48,226 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 5086 transitions, 113469 flow [2023-11-29 06:31:48,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 10.53191489361702) internal successors, (495), 47 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:48,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:48,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:48,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:31:48,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:31:48,427 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 06:31:48,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:48,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1372968666, now seen corresponding path program 8 times [2023-11-29 06:31:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:48,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056846431] [2023-11-29 06:31:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:48,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:49,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:49,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056846431] [2023-11-29 06:31:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056846431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19609569] [2023-11-29 06:31:49,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:31:49,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:49,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:49,261 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:49,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6ac866-4a40-48ea-9e32-be2c3ac32cb9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:31:49,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:31:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:49,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 06:31:49,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:50,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:51,041 INFO L349 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-11-29 06:31:51,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 106 [2023-11-29 06:31:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:52,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19609569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:52,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:52,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2023-11-29 06:31:52,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695943646] [2023-11-29 06:31:52,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:52,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 06:31:52,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:52,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 06:31:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 06:31:52,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:31:52,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 649 places, 5086 transitions, 113469 flow. Second operand has 46 states, 46 states have (on average 10.565217391304348) internal successors, (486), 46 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:52,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:52,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:31:52,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:05,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:35:44,593 INFO L124 PetriNetUnfolderBase]: 71446/154603 cut-off events. [2023-11-29 06:35:44,593 INFO L125 PetriNetUnfolderBase]: For 10782229/10796927 co-relation queries the response was YES.