./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/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_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/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_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:45,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:45,307 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:54:45,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:45,313 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:45,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:45,346 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:45,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:45,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:45,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:45,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:45,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:45,356 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:45,358 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:45,358 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:45,359 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:45,359 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:45,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:45,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:45,361 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:45,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:45,362 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:45,362 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:54:45,363 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:54:45,363 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:45,363 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:45,364 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:45,364 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:45,365 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:45,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:45,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:45,366 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:45,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:45,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:45,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:45,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:45,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:45,368 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:45,368 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:45,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:45,369 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:45,369 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_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-19 07:54:45,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:45,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:45,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:45,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:45,694 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:45,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-19 07:54:48,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:49,086 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:49,087 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-19 07:54:49,097 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/data/f2e763748/248275fef7ca4947a73c85df7457e41c/FLAG055a0926d [2023-11-19 07:54:49,122 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/data/f2e763748/248275fef7ca4947a73c85df7457e41c [2023-11-19 07:54:49,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:49,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:49,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:49,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:49,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:49,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d15780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49, skipping insertion in model container [2023-11-19 07:54:49,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,178 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:49,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:49,439 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:49,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:49,503 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:49,503 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:49,512 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:49,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49 WrapperNode [2023-11-19 07:54:49,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:49,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:49,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:49,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:49,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,589 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 169 [2023-11-19 07:54:49,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:49,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:49,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:49,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:49,603 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,617 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,631 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,642 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,644 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:49,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:49,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:49,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:49,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (1/1) ... [2023-11-19 07:54:49,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:49,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:54:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:54:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:54:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:54:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:54:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:54:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:54:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:49,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:49,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:49,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:49,750 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 07:54:49,901 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:49,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:50,255 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:50,367 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:50,368 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:54:50,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:50 BoogieIcfgContainer [2023-11-19 07:54:50,372 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:50,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:50,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:50,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:50,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:49" (1/3) ... [2023-11-19 07:54:50,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d762462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:50, skipping insertion in model container [2023-11-19 07:54:50,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:49" (2/3) ... [2023-11-19 07:54:50,384 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d762462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:50, skipping insertion in model container [2023-11-19 07:54:50,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:50" (3/3) ... [2023-11-19 07:54:50,385 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-19 07:54:50,395 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:54:50,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:50,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:54:50,425 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:50,541 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:54:50,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 163 transitions, 340 flow [2023-11-19 07:54:50,715 INFO L124 PetriNetUnfolderBase]: 11/161 cut-off events. [2023-11-19 07:54:50,716 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:54:50,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 11/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 191 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-19 07:54:50,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 163 transitions, 340 flow [2023-11-19 07:54:50,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 139 transitions, 287 flow [2023-11-19 07:54:50,742 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:50,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 139 transitions, 287 flow [2023-11-19 07:54:50,763 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 139 transitions, 287 flow [2023-11-19 07:54:50,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 139 transitions, 287 flow [2023-11-19 07:54:50,824 INFO L124 PetriNetUnfolderBase]: 10/139 cut-off events. [2023-11-19 07:54:50,824 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:50,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 10/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 184 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2023-11-19 07:54:50,834 INFO L119 LiptonReduction]: Number of co-enabled transitions 2186 [2023-11-19 07:54:57,499 INFO L134 LiptonReduction]: Checked pairs total: 2642 [2023-11-19 07:54:57,499 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-11-19 07:54:57,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:57,538 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;@195038c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:57,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-19 07:54:57,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:57,542 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-19 07:54:57,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:57,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:57,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:54:57,543 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 07:54:57,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash 22789, now seen corresponding path program 1 times [2023-11-19 07:54:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:57,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814863965] [2023-11-19 07:54:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:57,854 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 07:54:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814863965] [2023-11-19 07:54:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814863965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:57,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:57,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309362581] [2023-11-19 07:54:57,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:57,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:57,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:57,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-11-19 07:54:57,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 07:54:57,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:57,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-11-19 07:54:57,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:58,038 INFO L124 PetriNetUnfolderBase]: 131/228 cut-off events. [2023-11-19 07:54:58,038 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:54:58,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 228 events. 131/228 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 748 event pairs, 102 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 420. Up to 226 conditions per place. [2023-11-19 07:54:58,042 INFO L140 encePairwiseOnDemand]: 322/328 looper letters, 20 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-11-19 07:54:58,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 97 flow [2023-11-19 07:54:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-11-19 07:54:58,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44410569105691056 [2023-11-19 07:54:58,063 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-11-19 07:54:58,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-11-19 07:54:58,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:58,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-11-19 07:54:58,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states 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 07:54:58,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:54:58,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:54:58,091 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 61 flow. Second operand 3 states and 437 transitions. [2023-11-19 07:54:58,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 97 flow [2023-11-19 07:54:58,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:54:58,098 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 52 flow [2023-11-19 07:54:58,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-11-19 07:54:58,105 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-11-19 07:54:58,105 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 52 flow [2023-11-19 07:54:58,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 07:54:58,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:58,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 07:54:58,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:58,107 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 07:54:58,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash 22797, now seen corresponding path program 1 times [2023-11-19 07:54:58,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634351671] [2023-11-19 07:54:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:58,278 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 07:54:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634351671] [2023-11-19 07:54:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634351671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66310283] [2023-11-19 07:54:58,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:58,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-11-19 07:54:58,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 07:54:58,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:58,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-11-19 07:54:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:58,410 INFO L124 PetriNetUnfolderBase]: 132/230 cut-off events. [2023-11-19 07:54:58,411 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:54:58,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 230 events. 132/230 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 744 event pairs, 102 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 463. Up to 230 conditions per place. [2023-11-19 07:54:58,414 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-19 07:54:58,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 24 transitions, 106 flow [2023-11-19 07:54:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-11-19 07:54:58,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2023-11-19 07:54:58,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-11-19 07:54:58,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-11-19 07:54:58,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:58,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-11-19 07:54:58,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:58,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:54:58,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:54:58,426 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 436 transitions. [2023-11-19 07:54:58,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 24 transitions, 106 flow [2023-11-19 07:54:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:58,428 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 67 flow [2023-11-19 07:54:58,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, 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=67, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-11-19 07:54:58,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-11-19 07:54:58,429 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 67 flow [2023-11-19 07:54:58,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 07:54:58,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:58,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:58,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:58,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:54:58,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash 707804, now seen corresponding path program 1 times [2023-11-19 07:54:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:58,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338408561] [2023-11-19 07:54:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:58,498 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 07:54:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338408561] [2023-11-19 07:54:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338408561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609809166] [2023-11-19 07:54:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:58,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:58,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:58,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:58,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:58,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:54:58,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:58,679 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 07:54:58,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:58,697 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 07:54:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609809166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:58,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:58,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-19 07:54:58,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56247668] [2023-11-19 07:54:58,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:58,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:54:58,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:54:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:54:58,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 328 [2023-11-19 07:54:58,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 67 flow. Second operand has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:54:58,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:58,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 328 [2023-11-19 07:54:58,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:58,829 INFO L124 PetriNetUnfolderBase]: 135/236 cut-off events. [2023-11-19 07:54:58,829 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:54:58,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 236 events. 135/236 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 772 event pairs, 102 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 463. Up to 233 conditions per place. [2023-11-19 07:54:58,832 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 21 selfloop transitions, 9 changer transitions 0/30 dead transitions. [2023-11-19 07:54:58,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 30 transitions, 151 flow [2023-11-19 07:54:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:58,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 855 transitions. [2023-11-19 07:54:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344512195121951 [2023-11-19 07:54:58,837 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 855 transitions. [2023-11-19 07:54:58,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 855 transitions. [2023-11-19 07:54:58,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:58,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 855 transitions. [2023-11-19 07:54:58,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.5) internal successors, (855), 6 states have internal predecessors, (855), 0 states have call successors, (0), 0 states 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 07:54:58,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 07:54:58,848 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 07:54:58,849 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 67 flow. Second operand 6 states and 855 transitions. [2023-11-19 07:54:58,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 30 transitions, 151 flow [2023-11-19 07:54:58,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 146 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:58,851 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 123 flow [2023-11-19 07:54:58,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-19 07:54:58,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-19 07:54:58,852 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 123 flow [2023-11-19 07:54:58,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states 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 07:54:58,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:58,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:54:58,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:59,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:54:59,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 679898416, now seen corresponding path program 1 times [2023-11-19 07:54:59,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:59,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252822876] [2023-11-19 07:54:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:59,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:59,202 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 07:54:59,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252822876] [2023-11-19 07:54:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252822876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:59,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:59,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:59,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732566732] [2023-11-19 07:54:59,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:59,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:54:59,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:54:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:54:59,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 328 [2023-11-19 07:54:59,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 07:54:59,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:59,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 328 [2023-11-19 07:54:59,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:59,412 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2023-11-19 07:54:59,412 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:54:59,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 290 events. 158/290 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1050 event pairs, 126 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 604. Up to 235 conditions per place. [2023-11-19 07:54:59,416 INFO L140 encePairwiseOnDemand]: 318/328 looper letters, 27 selfloop transitions, 2 changer transitions 11/40 dead transitions. [2023-11-19 07:54:59,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 227 flow [2023-11-19 07:54:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:54:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:54:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-11-19 07:54:59,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336890243902439 [2023-11-19 07:54:59,419 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-11-19 07:54:59,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-11-19 07:54:59,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:59,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-11-19 07:54:59,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 07:54:59,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states 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 07:54:59,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states 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 07:54:59,427 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 123 flow. Second operand 4 states and 569 transitions. [2023-11-19 07:54:59,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 227 flow [2023-11-19 07:54:59,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 206 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:59,429 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 115 flow [2023-11-19 07:54:59,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-11-19 07:54:59,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-19 07:54:59,431 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 115 flow [2023-11-19 07:54:59,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 133.25) internal successors, (533), 4 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 07:54:59,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:59,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:54:59,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:59,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:54:59,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:59,433 INFO L85 PathProgramCache]: Analyzing trace with hash -387894527, now seen corresponding path program 1 times [2023-11-19 07:54:59,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:59,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000755057] [2023-11-19 07:54:59,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:59,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:59,572 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 07:54:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000755057] [2023-11-19 07:54:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000755057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:59,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918550850] [2023-11-19 07:54:59,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:59,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:59,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:59,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:59,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:59,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:54:59,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:59,673 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 07:54:59,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:54:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918550850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:59,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:54:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-19 07:54:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912419759] [2023-11-19 07:54:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:54:59,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-11-19 07:54:59,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 07:54:59,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:59,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-11-19 07:54:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:59,749 INFO L124 PetriNetUnfolderBase]: 77/138 cut-off events. [2023-11-19 07:54:59,750 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 07:54:59,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 138 events. 77/138 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 357 event pairs, 51 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 340. Up to 138 conditions per place. [2023-11-19 07:54:59,751 INFO L140 encePairwiseOnDemand]: 324/328 looper letters, 22 selfloop transitions, 1 changer transitions 3/26 dead transitions. [2023-11-19 07:54:59,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 155 flow [2023-11-19 07:54:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-11-19 07:54:59,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491869918699187 [2023-11-19 07:54:59,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-11-19 07:54:59,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-11-19 07:54:59,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:59,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-11-19 07:54:59,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states 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 07:54:59,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:54:59,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:54:59,761 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 115 flow. Second operand 3 states and 442 transitions. [2023-11-19 07:54:59,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 155 flow [2023-11-19 07:54:59,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:59,766 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 94 flow [2023-11-19 07:54:59,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-11-19 07:54:59,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-19 07:54:59,769 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 94 flow [2023-11-19 07:54:59,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states 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 07:54:59,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:59,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:54:59,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:59,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:59,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:54:59,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -387894529, now seen corresponding path program 1 times [2023-11-19 07:54:59,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:59,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341525198] [2023-11-19 07:54:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:59,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:00,110 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 07:55:00,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:00,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341525198] [2023-11-19 07:55:00,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341525198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:00,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:00,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:00,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775257354] [2023-11-19 07:55:00,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:00,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:55:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:55:00,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:55:00,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 328 [2023-11-19 07:55:00,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 07:55:00,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:00,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 328 [2023-11-19 07:55:00,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:00,232 INFO L124 PetriNetUnfolderBase]: 51/98 cut-off events. [2023-11-19 07:55:00,232 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 07:55:00,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 98 events. 51/98 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 235 event pairs, 10 based on Foata normal form. 12/101 useless extension candidates. Maximal degree in co-relation 245. Up to 53 conditions per place. [2023-11-19 07:55:00,233 INFO L140 encePairwiseOnDemand]: 322/328 looper letters, 23 selfloop transitions, 2 changer transitions 11/36 dead transitions. [2023-11-19 07:55:00,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 200 flow [2023-11-19 07:55:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:55:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:55:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2023-11-19 07:55:00,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2023-11-19 07:55:00,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2023-11-19 07:55:00,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2023-11-19 07:55:00,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:00,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2023-11-19 07:55:00,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 07:55:00,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states 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 07:55:00,245 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states 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 07:55:00,245 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 94 flow. Second operand 5 states and 705 transitions. [2023-11-19 07:55:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 200 flow [2023-11-19 07:55:00,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:00,250 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 121 flow [2023-11-19 07:55:00,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-11-19 07:55:00,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-19 07:55:00,253 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 121 flow [2023-11-19 07:55:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states 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 07:55:00,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:00,254 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-19 07:55:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:55:00,254 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:55:00,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash -387558195, now seen corresponding path program 2 times [2023-11-19 07:55:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127206555] [2023-11-19 07:55:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:00,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:00,368 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 07:55:00,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127206555] [2023-11-19 07:55:00,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127206555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936955467] [2023-11-19 07:55:00,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:00,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:00,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:00,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:00,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:55:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:00,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:00,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:00,480 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 07:55:00,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936955467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:00,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:00,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-19 07:55:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699777287] [2023-11-19 07:55:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:00,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:00,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:00,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 328 [2023-11-19 07:55:00,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 07:55:00,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:00,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 328 [2023-11-19 07:55:00,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:00,538 INFO L124 PetriNetUnfolderBase]: 38/72 cut-off events. [2023-11-19 07:55:00,538 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-19 07:55:00,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 72 events. 38/72 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 130 event pairs, 20 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 235. Up to 67 conditions per place. [2023-11-19 07:55:00,540 INFO L140 encePairwiseOnDemand]: 325/328 looper letters, 18 selfloop transitions, 5 changer transitions 0/23 dead transitions. [2023-11-19 07:55:00,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 23 transitions, 157 flow [2023-11-19 07:55:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-19 07:55:00,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4400406504065041 [2023-11-19 07:55:00,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-19 07:55:00,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-19 07:55:00,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:00,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-19 07:55:00,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 07:55:00,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:55:00,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 07:55:00,551 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 121 flow. Second operand 3 states and 433 transitions. [2023-11-19 07:55:00,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 23 transitions, 157 flow [2023-11-19 07:55:00,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 124 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-19 07:55:00,556 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 88 flow [2023-11-19 07:55:00,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-19 07:55:00,557 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-19 07:55:00,558 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 88 flow [2023-11-19 07:55:00,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 07:55:00,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:00,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:00,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:55:00,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:55:00,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1262123492, now seen corresponding path program 1 times [2023-11-19 07:55:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:00,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64766732] [2023-11-19 07:55:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:01,600 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 07:55:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:01,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64766732] [2023-11-19 07:55:01,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64766732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:01,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074637314] [2023-11-19 07:55:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:01,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:01,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:01,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:01,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:01,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:55:01,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:01,816 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 07:55:01,879 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 07:55:01,922 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 07:55:02,094 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 07:55:02,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:02,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:02,964 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 51 [2023-11-19 07:55:02,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:02,984 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 152 treesize of output 144 [2023-11-19 07:55:03,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:03,018 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 136 treesize of output 120 [2023-11-19 07:55:03,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:03,043 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 85 treesize of output 81 [2023-11-19 07:55:03,585 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 07:55:03,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074637314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:03,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:03,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-19 07:55:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417894976] [2023-11-19 07:55:03,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:55:03,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:55:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=343, Unknown=3, NotChecked=0, Total=462 [2023-11-19 07:55:04,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 328 [2023-11-19 07:55:04,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 88 flow. Second operand has 22 states, 22 states have (on average 86.36363636363636) internal successors, (1900), 22 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states 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 07:55:04,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:04,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 328 [2023-11-19 07:55:04,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:08,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-19 07:55:08,435 INFO L124 PetriNetUnfolderBase]: 181/330 cut-off events. [2023-11-19 07:55:08,435 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-19 07:55:08,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 330 events. 181/330 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1128 event pairs, 8 based on Foata normal form. 6/296 useless extension candidates. Maximal degree in co-relation 867. Up to 121 conditions per place. [2023-11-19 07:55:08,440 INFO L140 encePairwiseOnDemand]: 317/328 looper letters, 57 selfloop transitions, 44 changer transitions 2/103 dead transitions. [2023-11-19 07:55:08,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 103 transitions, 543 flow [2023-11-19 07:55:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:55:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:55:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2149 transitions. [2023-11-19 07:55:08,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2729928861788618 [2023-11-19 07:55:08,452 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2149 transitions. [2023-11-19 07:55:08,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2149 transitions. [2023-11-19 07:55:08,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:08,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2149 transitions. [2023-11-19 07:55:08,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.54166666666667) internal successors, (2149), 24 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states 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 07:55:08,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 328.0) internal successors, (8200), 25 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states 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 07:55:08,481 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 328.0) internal successors, (8200), 25 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states 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 07:55:08,482 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 88 flow. Second operand 24 states and 2149 transitions. [2023-11-19 07:55:08,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 103 transitions, 543 flow [2023-11-19 07:55:08,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 103 transitions, 533 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:55:08,489 INFO L231 Difference]: Finished difference. Result has 52 places, 60 transitions, 348 flow [2023-11-19 07:55:08,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=348, PETRI_PLACES=52, PETRI_TRANSITIONS=60} [2023-11-19 07:55:08,492 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-11-19 07:55:08,492 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 60 transitions, 348 flow [2023-11-19 07:55:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 86.36363636363636) internal successors, (1900), 22 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states 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 07:55:08,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:08,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:08,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:08,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:08,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:55:08,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -732650800, now seen corresponding path program 1 times [2023-11-19 07:55:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:08,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133179817] [2023-11-19 07:55:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,615 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 07:55:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133179817] [2023-11-19 07:55:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133179817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941169627] [2023-11-19 07:55:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:09,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:09,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:55:09,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:09,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:10,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:10,178 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 112 treesize of output 96 [2023-11-19 07:55:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:55:10,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941169627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:10,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:10,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 17 [2023-11-19 07:55:10,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038161565] [2023-11-19 07:55:10,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:10,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:55:10,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:10,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:55:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:55:12,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 328 [2023-11-19 07:55:12,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 348 flow. Second operand has 19 states, 19 states have (on average 114.84210526315789) internal successors, (2182), 19 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 07:55:12,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:12,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 328 [2023-11-19 07:55:12,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:13,169 INFO L124 PetriNetUnfolderBase]: 345/606 cut-off events. [2023-11-19 07:55:13,169 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2023-11-19 07:55:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 606 events. 345/606 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2528 event pairs, 16 based on Foata normal form. 12/605 useless extension candidates. Maximal degree in co-relation 2042. Up to 213 conditions per place. [2023-11-19 07:55:13,176 INFO L140 encePairwiseOnDemand]: 318/328 looper letters, 76 selfloop transitions, 57 changer transitions 2/135 dead transitions. [2023-11-19 07:55:13,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 135 transitions, 1005 flow [2023-11-19 07:55:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:55:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:55:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2125 transitions. [2023-11-19 07:55:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35992547425474253 [2023-11-19 07:55:13,185 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2125 transitions. [2023-11-19 07:55:13,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2125 transitions. [2023-11-19 07:55:13,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:13,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2125 transitions. [2023-11-19 07:55:13,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.05555555555556) internal successors, (2125), 18 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states 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 07:55:13,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 328.0) internal successors, (6232), 19 states have internal predecessors, (6232), 0 states have call successors, (0), 0 states 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 07:55:13,208 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 328.0) internal successors, (6232), 19 states have internal predecessors, (6232), 0 states have call successors, (0), 0 states 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 07:55:13,208 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 348 flow. Second operand 18 states and 2125 transitions. [2023-11-19 07:55:13,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 135 transitions, 1005 flow [2023-11-19 07:55:13,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 135 transitions, 917 flow, removed 40 selfloop flow, removed 3 redundant places. [2023-11-19 07:55:13,215 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 692 flow [2023-11-19 07:55:13,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=692, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2023-11-19 07:55:13,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-11-19 07:55:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 692 flow [2023-11-19 07:55:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.84210526315789) internal successors, (2182), 19 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states 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 07:55:13,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:13,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:13,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:13,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:13,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:55:13,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 297607194, now seen corresponding path program 1 times [2023-11-19 07:55:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:13,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268292227] [2023-11-19 07:55:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:14,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:14,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268292227] [2023-11-19 07:55:14,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268292227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:14,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284730039] [2023-11-19 07:55:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:14,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:14,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:14,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:14,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:14,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-19 07:55:14,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:15,051 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 07:55:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:55:15,162 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 22 treesize of output 17 [2023-11-19 07:55:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:55:15,265 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 22 treesize of output 17 [2023-11-19 07:55:16,016 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 07:55:16,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:17,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:17,880 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 156 treesize of output 108 [2023-11-19 07:55:18,004 INFO L349 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2023-11-19 07:55:18,005 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 752 treesize of output 715 [2023-11-19 07:55:18,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:55:18,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:55:18,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:18,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 210 treesize of output 193 [2023-11-19 07:55:18,140 INFO L349 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2023-11-19 07:55:18,140 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 215 treesize of output 165 [2023-11-19 07:55:20,510 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 07:55:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284730039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:20,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-11-19 07:55:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472624393] [2023-11-19 07:55:20,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:55:20,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:20,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:55:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=846, Unknown=3, NotChecked=0, Total=1056 [2023-11-19 07:55:21,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 328 [2023-11-19 07:55:21,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 692 flow. Second operand has 33 states, 33 states have (on average 84.27272727272727) internal successors, (2781), 33 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states 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 07:55:21,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:21,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 328 [2023-11-19 07:55:21,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:29,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-19 07:55:31,316 INFO L124 PetriNetUnfolderBase]: 669/1134 cut-off events. [2023-11-19 07:55:31,316 INFO L125 PetriNetUnfolderBase]: For 2912/2912 co-relation queries the response was YES. [2023-11-19 07:55:31,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 1134 events. 669/1134 cut-off events. For 2912/2912 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5386 event pairs, 32 based on Foata normal form. 24/1147 useless extension candidates. Maximal degree in co-relation 4979. Up to 438 conditions per place. [2023-11-19 07:55:31,331 INFO L140 encePairwiseOnDemand]: 317/328 looper letters, 130 selfloop transitions, 150 changer transitions 3/283 dead transitions. [2023-11-19 07:55:31,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 283 transitions, 2603 flow [2023-11-19 07:55:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-19 07:55:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-19 07:55:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4014 transitions. [2023-11-19 07:55:31,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2660392364793213 [2023-11-19 07:55:31,349 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4014 transitions. [2023-11-19 07:55:31,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4014 transitions. [2023-11-19 07:55:31,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:31,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4014 transitions. [2023-11-19 07:55:31,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 87.26086956521739) internal successors, (4014), 46 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states 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 07:55:31,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 328.0) internal successors, (15416), 47 states have internal predecessors, (15416), 0 states have call successors, (0), 0 states 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 07:55:31,409 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 328.0) internal successors, (15416), 47 states have internal predecessors, (15416), 0 states have call successors, (0), 0 states 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 07:55:31,417 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 692 flow. Second operand 46 states and 4014 transitions. [2023-11-19 07:55:31,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 283 transitions, 2603 flow [2023-11-19 07:55:31,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 283 transitions, 2560 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-11-19 07:55:31,446 INFO L231 Difference]: Finished difference. Result has 127 places, 195 transitions, 2227 flow [2023-11-19 07:55:31,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2227, PETRI_PLACES=127, PETRI_TRANSITIONS=195} [2023-11-19 07:55:31,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-11-19 07:55:31,448 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 195 transitions, 2227 flow [2023-11-19 07:55:31,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 84.27272727272727) internal successors, (2781), 33 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states 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 07:55:31,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:31,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:31,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:55:31,677 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-19 07:55:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash 365155884, now seen corresponding path program 2 times [2023-11-19 07:55:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120543802] [2023-11-19 07:55:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,270 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 07:55:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120543802] [2023-11-19 07:55:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120543802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296920981] [2023-11-19 07:55:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:33,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2da3aac5-b7c9-4bc4-a4a1-e78f5abbfd65/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:55:33,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:33,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:55:33,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:33,512 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 07:55:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:55:33,627 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 22 treesize of output 17 [2023-11-19 07:55:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:55:33,722 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 22 treesize of output 17 [2023-11-19 07:55:34,371 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 07:55:34,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:35,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:55:35,736 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 124 treesize of output 88 [2023-11-19 07:55:35,853 INFO L349 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-11-19 07:55:35,853 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 283 treesize of output 303 [2023-11-19 07:55:35,926 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-19 07:55:35,927 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 236 treesize of output 210 [2023-11-19 07:55:35,984 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-19 07:55:35,984 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 155 treesize of output 155