./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/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_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:34:35,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:34:35,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:34:35,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:34:35,449 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:34:35,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:34:35,480 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:34:35,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:34:35,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:34:35,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:34:35,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:34:35,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:34:35,485 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:34:35,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:34:35,486 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:34:35,487 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:34:35,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:34:35,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:34:35,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:34:35,490 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:34:35,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:34:35,491 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:34:35,492 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:34:35,492 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:34:35,493 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:34:35,494 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:34:35,494 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:34:35,495 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:34:35,496 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:34:35,496 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:34:35,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:35,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:34:35,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:34:35,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:34:35,499 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:34:35,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:34:35,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:34:35,501 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:34:35,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:34:35,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:34:35,502 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:34:35,503 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_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2023-11-19 07:34:35,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:34:35,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:34:35,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:34:35,857 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:34:35,857 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:34:35,859 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-19 07:34:39,131 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:34:39,440 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:34:39,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-19 07:34:39,454 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/data/674adfc91/2fdac5e3f56a42b4beecda37b567c718/FLAG6f134949b [2023-11-19 07:34:39,473 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/data/674adfc91/2fdac5e3f56a42b4beecda37b567c718 [2023-11-19 07:34:39,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:34:39,481 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:34:39,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:39,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:34:39,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:34:39,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13be7df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39, skipping insertion in model container [2023-11-19 07:34:39,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:34:39,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:39,771 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:34:39,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:34:39,807 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:34:39,807 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:34:39,815 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:34:39,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39 WrapperNode [2023-11-19 07:34:39,816 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:34:39,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:39,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:34:39,818 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:34:39,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,835 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,865 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 161 [2023-11-19 07:34:39,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:34:39,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:34:39,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:34:39,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:34:39,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,891 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:34:39,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:34:39,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:34:39,905 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:34:39,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (1/1) ... [2023-11-19 07:34:39,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:39,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:39,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:34:39,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:34:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:34:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:34:39,977 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:34:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:34:39,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:34:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:34:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:34:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:34:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:34:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:34:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:34:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:34:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:34:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:34:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:34:39,982 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:34:40,104 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:34:40,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:34:40,533 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:34:40,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:34:40,733 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:34:40,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:40 BoogieIcfgContainer [2023-11-19 07:34:40,738 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:34:40,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:34:40,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:34:40,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:34:40,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:39" (1/3) ... [2023-11-19 07:34:40,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13de241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:40, skipping insertion in model container [2023-11-19 07:34:40,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:39" (2/3) ... [2023-11-19 07:34:40,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13de241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:40, skipping insertion in model container [2023-11-19 07:34:40,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:40" (3/3) ... [2023-11-19 07:34:40,749 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-19 07:34:40,771 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:34:40,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:34:40,783 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:34:40,783 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:34:40,931 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:34:40,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 151 transitions, 316 flow [2023-11-19 07:34:41,054 INFO L124 PetriNetUnfolderBase]: 11/149 cut-off events. [2023-11-19 07:34:41,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:34:41,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 149 events. 11/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 134 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2023-11-19 07:34:41,066 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 151 transitions, 316 flow [2023-11-19 07:34:41,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 127 transitions, 263 flow [2023-11-19 07:34:41,080 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:34:41,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 127 transitions, 263 flow [2023-11-19 07:34:41,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 127 transitions, 263 flow [2023-11-19 07:34:41,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 127 transitions, 263 flow [2023-11-19 07:34:41,138 INFO L124 PetriNetUnfolderBase]: 10/127 cut-off events. [2023-11-19 07:34:41,138 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:34:41,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 127 events. 10/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2023-11-19 07:34:41,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 1332 [2023-11-19 07:34:47,459 INFO L134 LiptonReduction]: Checked pairs total: 1432 [2023-11-19 07:34:47,460 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-11-19 07:34:47,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:34:47,484 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;@2a6be16, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:34:47,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-19 07:34:47,488 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:34:47,489 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:34:47,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:34:47,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:47,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:34:47,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:47,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 21880, now seen corresponding path program 1 times [2023-11-19 07:34:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666510190] [2023-11-19 07:34:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:47,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666510190] [2023-11-19 07:34:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666510190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:47,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:47,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:34:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364115157] [2023-11-19 07:34:47,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:47,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:47,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:47,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 295 [2023-11-19 07:34:47,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:47,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:47,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 295 [2023-11-19 07:34:47,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:48,042 INFO L124 PetriNetUnfolderBase]: 158/245 cut-off events. [2023-11-19 07:34:48,042 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:34:48,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 245 events. 158/245 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 841 event pairs, 86 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 445. Up to 244 conditions per place. [2023-11-19 07:34:48,047 INFO L140 encePairwiseOnDemand]: 287/295 looper letters, 20 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:34:48,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 103 flow [2023-11-19 07:34:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-11-19 07:34:48,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485875706214689 [2023-11-19 07:34:48,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-11-19 07:34:48,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-11-19 07:34:48,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:48,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-11-19 07:34:48,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,086 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 59 flow. Second operand 3 states and 397 transitions. [2023-11-19 07:34:48,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 103 flow [2023-11-19 07:34:48,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 98 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:48,091 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 69 flow [2023-11-19 07:34:48,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-11-19 07:34:48,097 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-19 07:34:48,098 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 69 flow [2023-11-19 07:34:48,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:48,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:34:48,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:34:48,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:48,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 679872, now seen corresponding path program 1 times [2023-11-19 07:34:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:48,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780919118] [2023-11-19 07:34:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:48,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780919118] [2023-11-19 07:34:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780919118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308298339] [2023-11-19 07:34:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:48,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:48,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:48,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:34:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:48,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:34:48,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:48,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:48,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308298339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:48,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:48,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:34:48,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259000149] [2023-11-19 07:34:48,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:48,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:34:48,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:34:48,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:34:48,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 295 [2023-11-19 07:34:48,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 124.14285714285714) internal successors, (869), 7 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:48,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 295 [2023-11-19 07:34:48,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:48,618 INFO L124 PetriNetUnfolderBase]: 164/254 cut-off events. [2023-11-19 07:34:48,619 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:34:48,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542 conditions, 254 events. 164/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 864 event pairs, 86 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 488. Up to 246 conditions per place. [2023-11-19 07:34:48,623 INFO L140 encePairwiseOnDemand]: 290/295 looper letters, 19 selfloop transitions, 13 changer transitions 0/33 dead transitions. [2023-11-19 07:34:48,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 169 flow [2023-11-19 07:34:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:34:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:34:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 896 transitions. [2023-11-19 07:34:48,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43389830508474575 [2023-11-19 07:34:48,630 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 896 transitions. [2023-11-19 07:34:48,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 896 transitions. [2023-11-19 07:34:48,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:48,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 896 transitions. [2023-11-19 07:34:48,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 295.0) internal successors, (2360), 8 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,644 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 295.0) internal successors, (2360), 8 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,645 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 69 flow. Second operand 7 states and 896 transitions. [2023-11-19 07:34:48,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 169 flow [2023-11-19 07:34:48,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:48,648 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 148 flow [2023-11-19 07:34:48,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=148, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-19 07:34:48,649 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-19 07:34:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 148 flow [2023-11-19 07:34:48,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.14285714285714) internal successors, (869), 7 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:48,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-11-19 07:34:48,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:48,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:48,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:48,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:48,868 INFO L85 PathProgramCache]: Analyzing trace with hash 21077080, now seen corresponding path program 1 times [2023-11-19 07:34:48,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:48,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664792677] [2023-11-19 07:34:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:48,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:48,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:48,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664792677] [2023-11-19 07:34:48,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664792677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:48,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:48,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:48,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000632414] [2023-11-19 07:34:48,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:48,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:48,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:48,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 295 [2023-11-19 07:34:48,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:48,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:48,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 295 [2023-11-19 07:34:48,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:49,110 INFO L124 PetriNetUnfolderBase]: 161/250 cut-off events. [2023-11-19 07:34:49,110 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:34:49,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 250 events. 161/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 857 event pairs, 86 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 514. Up to 243 conditions per place. [2023-11-19 07:34:49,113 INFO L140 encePairwiseOnDemand]: 292/295 looper letters, 22 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2023-11-19 07:34:49,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 177 flow [2023-11-19 07:34:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-19 07:34:49,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406779661016949 [2023-11-19 07:34:49,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-19 07:34:49,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-19 07:34:49,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:49,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-19 07:34:49,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,123 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 148 flow. Second operand 3 states and 390 transitions. [2023-11-19 07:34:49,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 177 flow [2023-11-19 07:34:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 156 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:49,126 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 112 flow [2023-11-19 07:34:49,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-11-19 07:34:49,128 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-11-19 07:34:49,128 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 112 flow [2023-11-19 07:34:49,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:49,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:34:49,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:34:49,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:49,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:49,130 INFO L85 PathProgramCache]: Analyzing trace with hash 653105830, now seen corresponding path program 1 times [2023-11-19 07:34:49,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:49,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591396622] [2023-11-19 07:34:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:49,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:49,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591396622] [2023-11-19 07:34:49,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591396622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:49,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:49,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:34:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646200747] [2023-11-19 07:34:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:49,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:49,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2023-11-19 07:34:49,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:49,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2023-11-19 07:34:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:49,372 INFO L124 PetriNetUnfolderBase]: 150/248 cut-off events. [2023-11-19 07:34:49,372 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-11-19 07:34:49,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 248 events. 150/248 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 893 event pairs, 51 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 501. Up to 175 conditions per place. [2023-11-19 07:34:49,376 INFO L140 encePairwiseOnDemand]: 289/295 looper letters, 33 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2023-11-19 07:34:49,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 37 transitions, 201 flow [2023-11-19 07:34:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-11-19 07:34:49,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45649717514124294 [2023-11-19 07:34:49,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-11-19 07:34:49,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-11-19 07:34:49,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:49,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-11-19 07:34:49,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,387 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 112 flow. Second operand 3 states and 404 transitions. [2023-11-19 07:34:49,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 37 transitions, 201 flow [2023-11-19 07:34:49,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:34:49,390 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 118 flow [2023-11-19 07:34:49,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-19 07:34:49,391 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-19 07:34:49,391 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 118 flow [2023-11-19 07:34:49,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:49,392 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:34:49,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:34:49,393 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:49,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1219712183, now seen corresponding path program 2 times [2023-11-19 07:34:49,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007016777] [2023-11-19 07:34:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:49,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007016777] [2023-11-19 07:34:49,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007016777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:49,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052209217] [2023-11-19 07:34:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:34:49,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:49,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:49,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:34:49,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:34:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:34:49,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:34:49,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:34:49,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:49,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052209217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:49,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:49,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:34:49,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020232595] [2023-11-19 07:34:49,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:49,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:49,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:34:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 295 [2023-11-19 07:34:49,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:49,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 295 [2023-11-19 07:34:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:49,714 INFO L124 PetriNetUnfolderBase]: 150/247 cut-off events. [2023-11-19 07:34:49,714 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-19 07:34:49,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 247 events. 150/247 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 868 event pairs, 91 based on Foata normal form. 1/158 useless extension candidates. Maximal degree in co-relation 588. Up to 241 conditions per place. [2023-11-19 07:34:49,717 INFO L140 encePairwiseOnDemand]: 292/295 looper letters, 22 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2023-11-19 07:34:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 164 flow [2023-11-19 07:34:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-11-19 07:34:49,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463276836158192 [2023-11-19 07:34:49,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-11-19 07:34:49,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-11-19 07:34:49,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:49,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-11-19 07:34:49,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,729 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 118 flow. Second operand 3 states and 395 transitions. [2023-11-19 07:34:49,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 164 flow [2023-11-19 07:34:49,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 146 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-19 07:34:49,733 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 102 flow [2023-11-19 07:34:49,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-11-19 07:34:49,736 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-19 07:34:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 102 flow [2023-11-19 07:34:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:49,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:49,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:49,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:49,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:49,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:49,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash 574241770, now seen corresponding path program 1 times [2023-11-19 07:34:49,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539525033] [2023-11-19 07:34:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:50,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:50,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539525033] [2023-11-19 07:34:50,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539525033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:50,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:50,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:34:50,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170193811] [2023-11-19 07:34:50,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:50,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:34:50,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:50,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:34:50,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:34:50,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 295 [2023-11-19 07:34:50,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:50,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 295 [2023-11-19 07:34:50,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:50,239 INFO L124 PetriNetUnfolderBase]: 164/285 cut-off events. [2023-11-19 07:34:50,239 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-19 07:34:50,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 285 events. 164/285 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1090 event pairs, 106 based on Foata normal form. 6/202 useless extension candidates. Maximal degree in co-relation 560. Up to 245 conditions per place. [2023-11-19 07:34:50,243 INFO L140 encePairwiseOnDemand]: 289/295 looper letters, 25 selfloop transitions, 2 changer transitions 10/38 dead transitions. [2023-11-19 07:34:50,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 198 flow [2023-11-19 07:34:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:34:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:34:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 513 transitions. [2023-11-19 07:34:50,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4347457627118644 [2023-11-19 07:34:50,246 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 513 transitions. [2023-11-19 07:34:50,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 513 transitions. [2023-11-19 07:34:50,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:50,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 513 transitions. [2023-11-19 07:34:50,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,252 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,253 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 102 flow. Second operand 4 states and 513 transitions. [2023-11-19 07:34:50,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 198 flow [2023-11-19 07:34:50,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:34:50,255 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 96 flow [2023-11-19 07:34:50,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-19 07:34:50,256 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-19 07:34:50,256 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 96 flow [2023-11-19 07:34:50,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:50,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:50,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:34:50,258 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:50,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash 113310739, now seen corresponding path program 1 times [2023-11-19 07:34:50,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:50,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929115771] [2023-11-19 07:34:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:50,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:50,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929115771] [2023-11-19 07:34:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929115771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:50,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813607048] [2023-11-19 07:34:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:50,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:50,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:50,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:50,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:34:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:50,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:34:50,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:34:50,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:50,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813607048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:50,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:50,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-19 07:34:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822024581] [2023-11-19 07:34:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:50,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:50,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:50,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:34:50,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 295 [2023-11-19 07:34:50,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:50,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 295 [2023-11-19 07:34:50,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:50,548 INFO L124 PetriNetUnfolderBase]: 71/124 cut-off events. [2023-11-19 07:34:50,548 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-19 07:34:50,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 124 events. 71/124 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 334 event pairs, 39 based on Foata normal form. 18/124 useless extension candidates. Maximal degree in co-relation 301. Up to 123 conditions per place. [2023-11-19 07:34:50,550 INFO L140 encePairwiseOnDemand]: 291/295 looper letters, 20 selfloop transitions, 1 changer transitions 3/25 dead transitions. [2023-11-19 07:34:50,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 132 flow [2023-11-19 07:34:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:34:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-11-19 07:34:50,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485875706214689 [2023-11-19 07:34:50,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-11-19 07:34:50,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-11-19 07:34:50,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:50,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-11-19 07:34:50,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,558 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,558 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 96 flow. Second operand 3 states and 397 transitions. [2023-11-19 07:34:50,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 132 flow [2023-11-19 07:34:50,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 25 transitions, 126 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-19 07:34:50,560 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 73 flow [2023-11-19 07:34:50,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-19 07:34:50,561 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-19 07:34:50,561 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 73 flow [2023-11-19 07:34:50,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:50,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:50,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:50,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:50,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:50,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:50,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1517456655, now seen corresponding path program 1 times [2023-11-19 07:34:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707340534] [2023-11-19 07:34:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:51,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:51,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707340534] [2023-11-19 07:34:51,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707340534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:51,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975700494] [2023-11-19 07:34:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:51,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:51,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:51,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:34:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:51,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:34:51,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:51,679 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 [2023-11-19 07:34:51,730 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 8 treesize of output 1 [2023-11-19 07:34:51,775 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 8 treesize of output 1 [2023-11-19 07:34:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:52,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:52,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:52,860 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2023-11-19 07:34:52,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:52,877 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 340 treesize of output 316 [2023-11-19 07:34:52,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:52,902 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 106 treesize of output 102 [2023-11-19 07:34:52,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:52,921 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 105 treesize of output 89 [2023-11-19 07:34:53,197 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:34:53,197 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 1 [2023-11-19 07:34:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975700494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:34:53,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:34:53,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-19 07:34:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290477317] [2023-11-19 07:34:53,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:53,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:34:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:34:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=196, Unknown=3, NotChecked=0, Total=272 [2023-11-19 07:34:53,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 295 [2023-11-19 07:34:53,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 73 flow. Second operand has 17 states, 17 states have (on average 84.58823529411765) internal successors, (1438), 17 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:53,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:34:53,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 295 [2023-11-19 07:34:53,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:34:54,832 INFO L124 PetriNetUnfolderBase]: 117/230 cut-off events. [2023-11-19 07:34:54,832 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-19 07:34:54,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 230 events. 117/230 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 768 event pairs, 10 based on Foata normal form. 10/199 useless extension candidates. Maximal degree in co-relation 579. Up to 109 conditions per place. [2023-11-19 07:34:54,834 INFO L140 encePairwiseOnDemand]: 286/295 looper letters, 42 selfloop transitions, 27 changer transitions 5/75 dead transitions. [2023-11-19 07:34:54,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 75 transitions, 374 flow [2023-11-19 07:34:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:34:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:34:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1577 transitions. [2023-11-19 07:34:54,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2969868173258004 [2023-11-19 07:34:54,843 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1577 transitions. [2023-11-19 07:34:54,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1577 transitions. [2023-11-19 07:34:54,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:34:54,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1577 transitions. [2023-11-19 07:34:54,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.61111111111111) internal successors, (1577), 18 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:54,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 295.0) internal successors, (5605), 19 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:54,864 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 295.0) internal successors, (5605), 19 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:54,865 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 73 flow. Second operand 18 states and 1577 transitions. [2023-11-19 07:34:54,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 75 transitions, 374 flow [2023-11-19 07:34:54,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 75 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:34:54,868 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 258 flow [2023-11-19 07:34:54,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=258, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-19 07:34:54,871 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-11-19 07:34:54,871 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 258 flow [2023-11-19 07:34:54,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.58823529411765) internal successors, (1438), 17 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:34:54,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:34:54,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:54,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:55,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:34:55,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:34:55,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -674448825, now seen corresponding path program 1 times [2023-11-19 07:34:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037386315] [2023-11-19 07:34:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:55,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037386315] [2023-11-19 07:34:55,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037386315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105536889] [2023-11-19 07:34:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:55,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:55,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:55,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:55,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:34:55,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:55,976 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 [2023-11-19 07:34:56,069 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-11-19 07:34:56,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-19 07:34:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:56,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-19 07:34:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:56,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-19 07:34:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:34:56,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:57,753 INFO L349 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-11-19 07:34:57,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 163 [2023-11-19 07:34:57,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 223 [2023-11-19 07:34:57,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:57,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 229 [2023-11-19 07:34:57,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:57,832 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 195 treesize of output 180 [2023-11-19 07:34:57,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:57,885 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 171 treesize of output 168 [2023-11-19 07:34:57,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:57,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 287 treesize of output 287 [2023-11-19 07:34:57,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:57,995 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 253 treesize of output 238 [2023-11-19 07:34:58,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:58,041 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 229 treesize of output 226 [2023-11-19 07:35:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105536889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:01,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:01,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-19 07:35:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402879469] [2023-11-19 07:35:01,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:01,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:35:01,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:35:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=407, Unknown=5, NotChecked=0, Total=506 [2023-11-19 07:35:03,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 295 [2023-11-19 07:35:03,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 258 flow. Second operand has 23 states, 23 states have (on average 84.43478260869566) internal successors, (1942), 23 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:03,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:03,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 295 [2023-11-19 07:35:03,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:06,372 INFO L124 PetriNetUnfolderBase]: 250/455 cut-off events. [2023-11-19 07:35:06,377 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2023-11-19 07:35:06,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 455 events. 250/455 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1846 event pairs, 8 based on Foata normal form. 8/416 useless extension candidates. Maximal degree in co-relation 1644. Up to 239 conditions per place. [2023-11-19 07:35:06,389 INFO L140 encePairwiseOnDemand]: 286/295 looper letters, 74 selfloop transitions, 53 changer transitions 4/132 dead transitions. [2023-11-19 07:35:06,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 934 flow [2023-11-19 07:35:06,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 07:35:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-19 07:35:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2188 transitions. [2023-11-19 07:35:06,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2966779661016949 [2023-11-19 07:35:06,406 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2188 transitions. [2023-11-19 07:35:06,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2188 transitions. [2023-11-19 07:35:06,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:06,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2188 transitions. [2023-11-19 07:35:06,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 87.52) internal successors, (2188), 25 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:06,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 295.0) internal successors, (7670), 26 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:06,435 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 295.0) internal successors, (7670), 26 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:06,435 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 258 flow. Second operand 25 states and 2188 transitions. [2023-11-19 07:35:06,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 934 flow [2023-11-19 07:35:06,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 132 transitions, 890 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-11-19 07:35:06,446 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 677 flow [2023-11-19 07:35:06,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=677, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2023-11-19 07:35:06,448 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2023-11-19 07:35:06,448 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 677 flow [2023-11-19 07:35:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.43478260869566) internal successors, (1942), 23 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:06,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:06,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:06,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:06,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:06,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:35:06,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:06,665 INFO L85 PathProgramCache]: Analyzing trace with hash -720450175, now seen corresponding path program 2 times [2023-11-19 07:35:06,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:06,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435004595] [2023-11-19 07:35:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:06,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:09,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435004595] [2023-11-19 07:35:09,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435004595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:09,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68684671] [2023-11-19 07:35:09,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:09,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:09,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:09,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:09,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:35:09,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:35:09,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:09,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:09,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:35:09,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:09,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68684671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:09,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:09,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 11 [2023-11-19 07:35:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683889564] [2023-11-19 07:35:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:09,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:35:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:35:09,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:35:09,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 295 [2023-11-19 07:35:09,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:09,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:09,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 295 [2023-11-19 07:35:09,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:09,560 INFO L124 PetriNetUnfolderBase]: 240/449 cut-off events. [2023-11-19 07:35:09,561 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2023-11-19 07:35:09,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 449 events. 240/449 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1841 event pairs, 26 based on Foata normal form. 4/440 useless extension candidates. Maximal degree in co-relation 1913. Up to 307 conditions per place. [2023-11-19 07:35:09,567 INFO L140 encePairwiseOnDemand]: 291/295 looper letters, 79 selfloop transitions, 14 changer transitions 1/95 dead transitions. [2023-11-19 07:35:09,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 977 flow [2023-11-19 07:35:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:35:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-11-19 07:35:09,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42203389830508475 [2023-11-19 07:35:09,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-11-19 07:35:09,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-11-19 07:35:09,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:09,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-11-19 07:35:09,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:09,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:09,576 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:09,577 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 677 flow. Second operand 4 states and 498 transitions. [2023-11-19 07:35:09,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 977 flow [2023-11-19 07:35:09,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 828 flow, removed 64 selfloop flow, removed 8 redundant places. [2023-11-19 07:35:09,594 INFO L231 Difference]: Finished difference. Result has 72 places, 84 transitions, 619 flow [2023-11-19 07:35:09,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=619, PETRI_PLACES=72, PETRI_TRANSITIONS=84} [2023-11-19 07:35:09,596 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-11-19 07:35:09,596 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 84 transitions, 619 flow [2023-11-19 07:35:09,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:09,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:09,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:09,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:35:09,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:09,818 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:35:09,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:09,819 INFO L85 PathProgramCache]: Analyzing trace with hash -459872922, now seen corresponding path program 2 times [2023-11-19 07:35:09,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:09,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592734425] [2023-11-19 07:35:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592734425] [2023-11-19 07:35:10,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592734425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:10,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713178888] [2023-11-19 07:35:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:10,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:10,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:10,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:35:10,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:35:10,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:10,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:35:10,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:35:11,060 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713178888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:11,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:11,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2023-11-19 07:35:11,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753717138] [2023-11-19 07:35:11,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:11,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:11,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:35:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 295 [2023-11-19 07:35:11,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 84 transitions, 619 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:11,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 295 [2023-11-19 07:35:11,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:11,261 INFO L124 PetriNetUnfolderBase]: 226/431 cut-off events. [2023-11-19 07:35:11,261 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-11-19 07:35:11,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 431 events. 226/431 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1797 event pairs, 16 based on Foata normal form. 12/430 useless extension candidates. Maximal degree in co-relation 1706. Up to 307 conditions per place. [2023-11-19 07:35:11,267 INFO L140 encePairwiseOnDemand]: 290/295 looper letters, 74 selfloop transitions, 17 changer transitions 1/93 dead transitions. [2023-11-19 07:35:11,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 846 flow [2023-11-19 07:35:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:35:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:35:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 602 transitions. [2023-11-19 07:35:11,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408135593220339 [2023-11-19 07:35:11,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 602 transitions. [2023-11-19 07:35:11,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 602 transitions. [2023-11-19 07:35:11,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:11,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 602 transitions. [2023-11-19 07:35:11,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,278 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 295.0) internal successors, (1770), 6 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,278 INFO L175 Difference]: Start difference. First operand has 72 places, 84 transitions, 619 flow. Second operand 5 states and 602 transitions. [2023-11-19 07:35:11,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 846 flow [2023-11-19 07:35:11,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 822 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:11,286 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 648 flow [2023-11-19 07:35:11,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=648, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2023-11-19 07:35:11,287 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-11-19 07:35:11,288 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 648 flow [2023-11-19 07:35:11,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:11,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:11,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:11,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:11,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:35:11,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2013010511, now seen corresponding path program 1 times [2023-11-19 07:35:11,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:11,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940775906] [2023-11-19 07:35:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:11,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940775906] [2023-11-19 07:35:11,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940775906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98043645] [2023-11-19 07:35:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:11,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:11,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:11,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:35:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:11,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:35:11,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:11,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:11,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98043645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:11,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:11,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 07:35:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500259985] [2023-11-19 07:35:11,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:11,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:35:11,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:35:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:35:12,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 295 [2023-11-19 07:35:12,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 648 flow. Second operand has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:12,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 295 [2023-11-19 07:35:12,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:12,222 INFO L124 PetriNetUnfolderBase]: 176/349 cut-off events. [2023-11-19 07:35:12,222 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2023-11-19 07:35:12,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1440 conditions, 349 events. 176/349 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1378 event pairs, 92 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1414. Up to 318 conditions per place. [2023-11-19 07:35:12,227 INFO L140 encePairwiseOnDemand]: 291/295 looper letters, 64 selfloop transitions, 3 changer transitions 11/79 dead transitions. [2023-11-19 07:35:12,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 740 flow [2023-11-19 07:35:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:35:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-11-19 07:35:12,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40847457627118644 [2023-11-19 07:35:12,231 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-11-19 07:35:12,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-11-19 07:35:12,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:12,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-11-19 07:35:12,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,240 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 295.0) internal successors, (2065), 7 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,241 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 648 flow. Second operand 6 states and 723 transitions. [2023-11-19 07:35:12,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 740 flow [2023-11-19 07:35:12,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 687 flow, removed 6 selfloop flow, removed 8 redundant places. [2023-11-19 07:35:12,248 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 482 flow [2023-11-19 07:35:12,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=482, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-11-19 07:35:12,249 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 38 predicate places. [2023-11-19 07:35:12,250 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 482 flow [2023-11-19 07:35:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:12,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:12,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:12,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:12,472 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:35:12,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1186489504, now seen corresponding path program 2 times [2023-11-19 07:35:12,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254059029] [2023-11-19 07:35:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:35:12,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:12,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254059029] [2023-11-19 07:35:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254059029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:12,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:12,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783164132] [2023-11-19 07:35:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:35:12,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:35:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:35:12,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 295 [2023-11-19 07:35:12,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 482 flow. Second operand has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 295 [2023-11-19 07:35:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:12,705 INFO L124 PetriNetUnfolderBase]: 212/399 cut-off events. [2023-11-19 07:35:12,705 INFO L125 PetriNetUnfolderBase]: For 759/759 co-relation queries the response was YES. [2023-11-19 07:35:12,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 399 events. 212/399 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1580 event pairs, 44 based on Foata normal form. 24/414 useless extension candidates. Maximal degree in co-relation 1568. Up to 247 conditions per place. [2023-11-19 07:35:12,710 INFO L140 encePairwiseOnDemand]: 290/295 looper letters, 65 selfloop transitions, 20 changer transitions 1/87 dead transitions. [2023-11-19 07:35:12,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 799 flow [2023-11-19 07:35:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:35:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-11-19 07:35:12,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44152542372881354 [2023-11-19 07:35:12,713 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-11-19 07:35:12,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-11-19 07:35:12,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:12,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-11-19 07:35:12,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,718 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 295.0) internal successors, (1475), 5 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,719 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 482 flow. Second operand 4 states and 521 transitions. [2023-11-19 07:35:12,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 799 flow [2023-11-19 07:35:12,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 785 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:12,727 INFO L231 Difference]: Finished difference. Result has 63 places, 79 transitions, 665 flow [2023-11-19 07:35:12,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=665, PETRI_PLACES=63, PETRI_TRANSITIONS=79} [2023-11-19 07:35:12,728 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-11-19 07:35:12,728 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 79 transitions, 665 flow [2023-11-19 07:35:12,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:12,729 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:12,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:35:12,729 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:35:12,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2097288336, now seen corresponding path program 1 times [2023-11-19 07:35:12,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458543818] [2023-11-19 07:35:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:14,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:14,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458543818] [2023-11-19 07:35:14,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458543818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:14,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192200441] [2023-11-19 07:35:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:14,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:14,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:14,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:14,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:35:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:14,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:35:14,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:14,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:15,089 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-19 07:35:15,089 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 153 treesize of output 132 [2023-11-19 07:35:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:35:15,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192200441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:15,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:15,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 21 [2023-11-19 07:35:15,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233984265] [2023-11-19 07:35:15,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:15,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-19 07:35:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-19 07:35:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:35:17,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 295 [2023-11-19 07:35:17,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 665 flow. Second operand has 23 states, 23 states have (on average 106.6086956521739) internal successors, (2452), 23 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:17,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:17,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 295 [2023-11-19 07:35:17,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:18,288 INFO L124 PetriNetUnfolderBase]: 352/651 cut-off events. [2023-11-19 07:35:18,288 INFO L125 PetriNetUnfolderBase]: For 2220/2220 co-relation queries the response was YES. [2023-11-19 07:35:18,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2950 conditions, 651 events. 352/651 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2970 event pairs, 16 based on Foata normal form. 40/690 useless extension candidates. Maximal degree in co-relation 2926. Up to 206 conditions per place. [2023-11-19 07:35:18,297 INFO L140 encePairwiseOnDemand]: 287/295 looper letters, 92 selfloop transitions, 56 changer transitions 6/155 dead transitions. [2023-11-19 07:35:18,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 155 transitions, 1535 flow [2023-11-19 07:35:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:35:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:35:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2285 transitions. [2023-11-19 07:35:18,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688458434221146 [2023-11-19 07:35:18,307 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2285 transitions. [2023-11-19 07:35:18,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2285 transitions. [2023-11-19 07:35:18,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:18,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2285 transitions. [2023-11-19 07:35:18,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 108.80952380952381) internal successors, (2285), 21 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,329 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 295.0) internal successors, (6490), 22 states have internal predecessors, (6490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,329 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 665 flow. Second operand 21 states and 2285 transitions. [2023-11-19 07:35:18,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 155 transitions, 1535 flow [2023-11-19 07:35:18,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 155 transitions, 1535 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:18,341 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 1201 flow [2023-11-19 07:35:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=295, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1201, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2023-11-19 07:35:18,342 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2023-11-19 07:35:18,342 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 1201 flow [2023-11-19 07:35:18,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 106.6086956521739) internal successors, (2452), 23 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:18,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:18,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:18,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:35:18,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:35:18,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1878952752, now seen corresponding path program 3 times [2023-11-19 07:35:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490400052] [2023-11-19 07:35:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:19,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490400052] [2023-11-19 07:35:19,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490400052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:19,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672166369] [2023-11-19 07:35:19,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:19,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:19,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:19,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2b7a621-860d-4ee0-be5b-b95bc5f04b88/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:35:19,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:35:19,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:19,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:35:19,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:19,452 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 [2023-11-19 07:35:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:19,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:35:19,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:35:19,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:35:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:21,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:35:21,086 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-11-19 07:35:21,191 INFO L349 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-11-19 07:35:21,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 573 treesize of output 559 [2023-11-19 07:35:21,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:35:21,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:35:21,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 180 [2023-11-19 07:35:21,304 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-19 07:35:21,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 153