./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl --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 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:12:42,165 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:12:42,232 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:12:42,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:12:42,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:12:42,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:12:42,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:12:42,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:12:42,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:12:42,267 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:12:42,268 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:12:42,268 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:12:42,269 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:12:42,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:12:42,270 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:12:42,271 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:12:42,271 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:12:42,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:12:42,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:12:42,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:12:42,274 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:12:42,275 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:12:42,275 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:12:42,276 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:12:42,276 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:12:42,277 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:12:42,277 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:12:42,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:12:42,278 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:12:42,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:12:42,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:12:42,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:12:42,281 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:12:42,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:12:42,282 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:12:42,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:12:42,282 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:12:42,283 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:12:42,283 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:12:42,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:12:42,284 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:12:42,284 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_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 [2023-11-12 02:12:42,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:12:42,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:12:42,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:12:42,613 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:12:42,615 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:12:42,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2023-11-12 02:12:45,862 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:12:46,149 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:12:46,150 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2023-11-12 02:12:46,158 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/data/93382dfeb/da9bdeec1e384cb8aa75f82ffa230fc9/FLAG2d5a1e5f8 [2023-11-12 02:12:46,174 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/data/93382dfeb/da9bdeec1e384cb8aa75f82ffa230fc9 [2023-11-12 02:12:46,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:12:46,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:12:46,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:12:46,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:12:46,187 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:12:46,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be119e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46, skipping insertion in model container [2023-11-12 02:12:46,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:12:46,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:12:46,427 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:12:46,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:12:46,473 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:12:46,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46 WrapperNode [2023-11-12 02:12:46,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:12:46,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:12:46,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:12:46,476 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:12:46,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,494 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,541 INFO L138 Inliner]: procedures = 25, calls = 47, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 213 [2023-11-12 02:12:46,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:12:46,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:12:46,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:12:46,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:12:46,560 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:12:46,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:12:46,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:12:46,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:12:46,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (1/1) ... [2023-11-12 02:12:46,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:12:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:46,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:12:46,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:12:46,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:12:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:12:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:12:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:12:46,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:12:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:12:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:12:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:12:46,703 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:12:46,703 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:12:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:12:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:12:46,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:12:46,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:12:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:12:46,707 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:12:46,897 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:12:46,899 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:12:47,477 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:12:47,492 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:12:47,492 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-12 02:12:47,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:47 BoogieIcfgContainer [2023-11-12 02:12:47,495 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:12:47,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:12:47,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:12:47,503 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:12:47,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:12:46" (1/3) ... [2023-11-12 02:12:47,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d1907e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:12:47, skipping insertion in model container [2023-11-12 02:12:47,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:46" (2/3) ... [2023-11-12 02:12:47,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d1907e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:12:47, skipping insertion in model container [2023-11-12 02:12:47,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:47" (3/3) ... [2023-11-12 02:12:47,506 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2023-11-12 02:12:47,516 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:12:47,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:12:47,529 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-12 02:12:47,529 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:12:47,726 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:12:47,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 322 places, 337 transitions, 695 flow [2023-11-12 02:12:47,913 INFO L124 PetriNetUnfolderBase]: 25/334 cut-off events. [2023-11-12 02:12:47,914 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:12:47,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 334 events. 25/334 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 302 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-11-12 02:12:47,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 322 places, 337 transitions, 695 flow [2023-11-12 02:12:47,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 294 transitions, 603 flow [2023-11-12 02:12:47,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:12:47,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 294 transitions, 603 flow [2023-11-12 02:12:47,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 294 transitions, 603 flow [2023-11-12 02:12:47,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 294 transitions, 603 flow [2023-11-12 02:12:48,068 INFO L124 PetriNetUnfolderBase]: 23/294 cut-off events. [2023-11-12 02:12:48,069 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:12:48,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 294 events. 23/294 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 298 event pairs, 0 based on Foata normal form. 0/257 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-11-12 02:12:48,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 3840 [2023-11-12 02:12:58,534 INFO L134 LiptonReduction]: Checked pairs total: 7590 [2023-11-12 02:12:58,534 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-11-12 02:12:58,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:12:58,559 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;@671bc42b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:12:58,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-12 02:12:58,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:12:58,562 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-12 02:12:58,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:12:58,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:12:58,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:12:58,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:12:58,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 38427, now seen corresponding path program 1 times [2023-11-12 02:12:58,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:58,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360239156] [2023-11-12 02:12:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:58,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:58,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360239156] [2023-11-12 02:12:58,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360239156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:58,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:58,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:12:58,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802315847] [2023-11-12 02:12:58,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:58,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:58,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:58,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:59,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 660 [2023-11-12 02:12:59,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:59,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:12:59,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 660 [2023-11-12 02:12:59,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:12:59,427 INFO L124 PetriNetUnfolderBase]: 1397/2098 cut-off events. [2023-11-12 02:12:59,427 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-12 02:12:59,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4237 conditions, 2098 events. 1397/2098 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10182 event pairs, 1125 based on Foata normal form. 0/1273 useless extension candidates. Maximal degree in co-relation 3680. Up to 1995 conditions per place. [2023-11-12 02:12:59,449 INFO L140 encePairwiseOnDemand]: 654/660 looper letters, 39 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-11-12 02:12:59,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 185 flow [2023-11-12 02:12:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:12:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 921 transitions. [2023-11-12 02:12:59,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46515151515151515 [2023-11-12 02:12:59,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 921 transitions. [2023-11-12 02:12:59,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 921 transitions. [2023-11-12 02:12:59,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:12:59,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 921 transitions. [2023-11-12 02:12:59,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.0) internal successors, (921), 3 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:59,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:59,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:59,508 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 111 flow. Second operand 3 states and 921 transitions. [2023-11-12 02:12:59,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 185 flow [2023-11-12 02:12:59,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-12 02:12:59,519 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 98 flow [2023-11-12 02:12:59,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-11-12 02:12:59,526 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -7 predicate places. [2023-11-12 02:12:59,526 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 98 flow [2023-11-12 02:12:59,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:59,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:12:59,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:12:59,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:12:59,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:12:59,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:59,530 INFO L85 PathProgramCache]: Analyzing trace with hash 38467, now seen corresponding path program 1 times [2023-11-12 02:12:59,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:59,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485175859] [2023-11-12 02:12:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:59,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:12:59,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:59,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485175859] [2023-11-12 02:12:59,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485175859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:59,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:59,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:12:59,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284555768] [2023-11-12 02:12:59,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:59,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:59,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:59,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 660 [2023-11-12 02:12:59,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:59,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:12:59,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 660 [2023-11-12 02:12:59,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:00,144 INFO L124 PetriNetUnfolderBase]: 1401/2106 cut-off events. [2023-11-12 02:13:00,144 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-12 02:13:00,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 2106 events. 1401/2106 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10227 event pairs, 1125 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 4157. Up to 2008 conditions per place. [2023-11-12 02:13:00,162 INFO L140 encePairwiseOnDemand]: 647/660 looper letters, 40 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2023-11-12 02:13:00,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 214 flow [2023-11-12 02:13:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 929 transitions. [2023-11-12 02:13:00,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691919191919192 [2023-11-12 02:13:00,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 929 transitions. [2023-11-12 02:13:00,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 929 transitions. [2023-11-12 02:13:00,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:00,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 929 transitions. [2023-11-12 02:13:00,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.6666666666667) internal successors, (929), 3 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:00,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:00,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:00,181 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 98 flow. Second operand 3 states and 929 transitions. [2023-11-12 02:13:00,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 214 flow [2023-11-12 02:13:00,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:00,184 INFO L231 Difference]: Finished difference. Result has 46 places, 52 transitions, 170 flow [2023-11-12 02:13:00,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=46, PETRI_TRANSITIONS=52} [2023-11-12 02:13:00,185 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-11-12 02:13:00,186 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 52 transitions, 170 flow [2023-11-12 02:13:00,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:00,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:00,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:13:00,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:13:00,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:00,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1193589, now seen corresponding path program 1 times [2023-11-12 02:13:00,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:00,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096511559] [2023-11-12 02:13:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096511559] [2023-11-12 02:13:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096511559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155131874] [2023-11-12 02:13:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:00,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:00,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:13:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:00,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:00,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:00,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155131874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:00,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:00,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-12 02:13:00,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249685260] [2023-11-12 02:13:00,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:00,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:13:00,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:13:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:13:00,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 660 [2023-11-12 02:13:00,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 52 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:00,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:00,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 660 [2023-11-12 02:13:00,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:01,017 INFO L124 PetriNetUnfolderBase]: 1413/2130 cut-off events. [2023-11-12 02:13:01,017 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-12 02:13:01,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4314 conditions, 2130 events. 1413/2130 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10296 event pairs, 1125 based on Foata normal form. 0/1304 useless extension candidates. Maximal degree in co-relation 4157. Up to 2011 conditions per place. [2023-11-12 02:13:01,036 INFO L140 encePairwiseOnDemand]: 647/660 looper letters, 40 selfloop transitions, 33 changer transitions 0/76 dead transitions. [2023-11-12 02:13:01,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 430 flow [2023-11-12 02:13:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:13:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1837 transitions. [2023-11-12 02:13:01,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2023-11-12 02:13:01,044 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1837 transitions. [2023-11-12 02:13:01,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1837 transitions. [2023-11-12 02:13:01,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:01,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1837 transitions. [2023-11-12 02:13:01,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 306.1666666666667) internal successors, (1837), 6 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:01,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:01,067 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:01,067 INFO L175 Difference]: Start difference. First operand has 46 places, 52 transitions, 170 flow. Second operand 6 states and 1837 transitions. [2023-11-12 02:13:01,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 430 flow [2023-11-12 02:13:01,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:01,071 INFO L231 Difference]: Finished difference. Result has 52 places, 76 transitions, 384 flow [2023-11-12 02:13:01,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=52, PETRI_TRANSITIONS=76} [2023-11-12 02:13:01,073 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-11-12 02:13:01,073 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 76 transitions, 384 flow [2023-11-12 02:13:01,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:01,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:01,075 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:13:01,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:13:01,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-12 02:13:01,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:01,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1199575747, now seen corresponding path program 2 times [2023-11-12 02:13:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:01,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221910622] [2023-11-12 02:13:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221910622] [2023-11-12 02:13:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221910622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934804620] [2023-11-12 02:13:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:01,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:01,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:01,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:13:01,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:13:01,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:01,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:13:01,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:13:01,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:01,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934804620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-12 02:13:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145828742] [2023-11-12 02:13:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 300 out of 660 [2023-11-12 02:13:01,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 76 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:01,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:01,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 300 of 660 [2023-11-12 02:13:01,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:01,977 INFO L124 PetriNetUnfolderBase]: 1413/2129 cut-off events. [2023-11-12 02:13:01,977 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-12 02:13:01,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4367 conditions, 2129 events. 1413/2129 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10310 event pairs, 1125 based on Foata normal form. 1/1305 useless extension candidates. Maximal degree in co-relation 4250. Up to 2032 conditions per place. [2023-11-12 02:13:01,998 INFO L140 encePairwiseOnDemand]: 657/660 looper letters, 66 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2023-11-12 02:13:01,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 518 flow [2023-11-12 02:13:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 941 transitions. [2023-11-12 02:13:02,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47525252525252526 [2023-11-12 02:13:02,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 941 transitions. [2023-11-12 02:13:02,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 941 transitions. [2023-11-12 02:13:02,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:02,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 941 transitions. [2023-11-12 02:13:02,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:02,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:02,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:02,027 INFO L175 Difference]: Start difference. First operand has 52 places, 76 transitions, 384 flow. Second operand 3 states and 941 transitions. [2023-11-12 02:13:02,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 518 flow [2023-11-12 02:13:02,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 470 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-12 02:13:02,035 INFO L231 Difference]: Finished difference. Result has 52 places, 75 transitions, 338 flow [2023-11-12 02:13:02,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=52, PETRI_TRANSITIONS=75} [2023-11-12 02:13:02,036 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-11-12 02:13:02,036 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 75 transitions, 338 flow [2023-11-12 02:13:02,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:02,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:02,038 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-12 02:13:02,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:13:02,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:02,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:02,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -648108425, now seen corresponding path program 1 times [2023-11-12 02:13:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:02,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229429639] [2023-11-12 02:13:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:13:02,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:02,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229429639] [2023-11-12 02:13:02,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229429639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:02,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:02,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:13:02,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599896037] [2023-11-12 02:13:02,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:02,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:02,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:13:02,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 660 [2023-11-12 02:13:02,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 75 transitions, 338 flow. Second operand has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:02,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:02,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 660 [2023-11-12 02:13:02,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:03,065 INFO L124 PetriNetUnfolderBase]: 1413/2132 cut-off events. [2023-11-12 02:13:03,065 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-12 02:13:03,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4356 conditions, 2132 events. 1413/2132 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10334 event pairs, 1125 based on Foata normal form. 3/1314 useless extension candidates. Maximal degree in co-relation 4251. Up to 2023 conditions per place. [2023-11-12 02:13:03,084 INFO L140 encePairwiseOnDemand]: 651/660 looper letters, 53 selfloop transitions, 22 changer transitions 0/78 dead transitions. [2023-11-12 02:13:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 501 flow [2023-11-12 02:13:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:13:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1182 transitions. [2023-11-12 02:13:03,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2023-11-12 02:13:03,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1182 transitions. [2023-11-12 02:13:03,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1182 transitions. [2023-11-12 02:13:03,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:03,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1182 transitions. [2023-11-12 02:13:03,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.5) internal successors, (1182), 4 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:03,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:03,105 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:03,105 INFO L175 Difference]: Start difference. First operand has 52 places, 75 transitions, 338 flow. Second operand 4 states and 1182 transitions. [2023-11-12 02:13:03,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 501 flow [2023-11-12 02:13:03,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:03,112 INFO L231 Difference]: Finished difference. Result has 54 places, 78 transitions, 408 flow [2023-11-12 02:13:03,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=408, PETRI_PLACES=54, PETRI_TRANSITIONS=78} [2023-11-12 02:13:03,116 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-11-12 02:13:03,117 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 78 transitions, 408 flow [2023-11-12 02:13:03,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 283.25) internal successors, (1133), 4 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:03,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:03,122 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 02:13:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:13:03,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:03,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1734126203, now seen corresponding path program 1 times [2023-11-12 02:13:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303155693] [2023-11-12 02:13:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303155693] [2023-11-12 02:13:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303155693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:03,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529043766] [2023-11-12 02:13:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:03,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:03,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:03,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:03,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:13:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:03,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:13:03,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:03,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529043766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:03,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:03,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-11-12 02:13:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510330403] [2023-11-12 02:13:03,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:03,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:13:03,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:13:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:13:04,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 660 [2023-11-12 02:13:04,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 78 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 279.26666666666665) internal successors, (4189), 15 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:04,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:04,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 660 [2023-11-12 02:13:04,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:05,447 INFO L124 PetriNetUnfolderBase]: 2808/4226 cut-off events. [2023-11-12 02:13:05,447 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2023-11-12 02:13:05,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8588 conditions, 4226 events. 2808/4226 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21233 event pairs, 2250 based on Foata normal form. 3/2606 useless extension candidates. Maximal degree in co-relation 8478. Up to 2013 conditions per place. [2023-11-12 02:13:05,487 INFO L140 encePairwiseOnDemand]: 648/660 looper letters, 73 selfloop transitions, 39 changer transitions 0/115 dead transitions. [2023-11-12 02:13:05,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 115 transitions, 766 flow [2023-11-12 02:13:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:13:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:13:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2601 transitions. [2023-11-12 02:13:05,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43787878787878787 [2023-11-12 02:13:05,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2601 transitions. [2023-11-12 02:13:05,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2601 transitions. [2023-11-12 02:13:05,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:05,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2601 transitions. [2023-11-12 02:13:05,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:05,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 660.0) internal successors, (6600), 10 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:05,522 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 660.0) internal successors, (6600), 10 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:05,523 INFO L175 Difference]: Start difference. First operand has 54 places, 78 transitions, 408 flow. Second operand 9 states and 2601 transitions. [2023-11-12 02:13:05,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 115 transitions, 766 flow [2023-11-12 02:13:05,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 731 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-12 02:13:05,529 INFO L231 Difference]: Finished difference. Result has 61 places, 87 transitions, 523 flow [2023-11-12 02:13:05,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=523, PETRI_PLACES=61, PETRI_TRANSITIONS=87} [2023-11-12 02:13:05,530 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-11-12 02:13:05,530 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 87 transitions, 523 flow [2023-11-12 02:13:05,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 279.26666666666665) internal successors, (4189), 15 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:05,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:05,533 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1] [2023-11-12 02:13:05,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:05,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:13:05,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:05,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1040938953, now seen corresponding path program 2 times [2023-11-12 02:13:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061036579] [2023-11-12 02:13:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:05,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061036579] [2023-11-12 02:13:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061036579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604792463] [2023-11-12 02:13:05,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:05,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:05,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:05,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:05,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:13:05,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:13:05,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:05,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:13:05,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:13:06,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:06,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604792463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:06,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:06,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-12 02:13:06,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582560423] [2023-11-12 02:13:06,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:06,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:06,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:06,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:13:06,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 660 [2023-11-12 02:13:06,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 87 transitions, 523 flow. Second operand has 4 states, 4 states have (on average 299.25) internal successors, (1197), 4 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:06,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:06,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 660 [2023-11-12 02:13:06,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:06,690 INFO L124 PetriNetUnfolderBase]: 2808/4223 cut-off events. [2023-11-12 02:13:06,691 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-12 02:13:06,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8591 conditions, 4223 events. 2808/4223 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21607 event pairs, 2250 based on Foata normal form. 3/2590 useless extension candidates. Maximal degree in co-relation 8493. Up to 3994 conditions per place. [2023-11-12 02:13:06,731 INFO L140 encePairwiseOnDemand]: 655/660 looper letters, 72 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2023-11-12 02:13:06,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 649 flow [2023-11-12 02:13:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:13:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1232 transitions. [2023-11-12 02:13:06,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-12 02:13:06,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1232 transitions. [2023-11-12 02:13:06,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1232 transitions. [2023-11-12 02:13:06,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:06,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1232 transitions. [2023-11-12 02:13:06,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:06,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:06,749 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:06,749 INFO L175 Difference]: Start difference. First operand has 61 places, 87 transitions, 523 flow. Second operand 4 states and 1232 transitions. [2023-11-12 02:13:06,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 649 flow [2023-11-12 02:13:06,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 519 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-11-12 02:13:06,753 INFO L231 Difference]: Finished difference. Result has 53 places, 84 transitions, 375 flow [2023-11-12 02:13:06,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=375, PETRI_PLACES=53, PETRI_TRANSITIONS=84} [2023-11-12 02:13:06,754 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-11-12 02:13:06,754 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 84 transitions, 375 flow [2023-11-12 02:13:06,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 299.25) internal successors, (1197), 4 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:06,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:06,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:06,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:06,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:06,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:06,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:06,961 INFO L85 PathProgramCache]: Analyzing trace with hash -929400353, now seen corresponding path program 1 times [2023-11-12 02:13:06,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:06,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016295966] [2023-11-12 02:13:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:06,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:07,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:07,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016295966] [2023-11-12 02:13:07,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016295966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:07,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:07,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:07,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994211041] [2023-11-12 02:13:07,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:07,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:07,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 660 [2023-11-12 02:13:07,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 84 transitions, 375 flow. Second operand has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:07,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:07,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 660 [2023-11-12 02:13:07,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:07,780 INFO L124 PetriNetUnfolderBase]: 3804/5753 cut-off events. [2023-11-12 02:13:07,780 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-12 02:13:07,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11450 conditions, 5753 events. 3804/5753 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31454 event pairs, 2250 based on Foata normal form. 0/3643 useless extension candidates. Maximal degree in co-relation 5648. Up to 4212 conditions per place. [2023-11-12 02:13:07,821 INFO L140 encePairwiseOnDemand]: 655/660 looper letters, 98 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2023-11-12 02:13:07,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 104 transitions, 620 flow [2023-11-12 02:13:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:07,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 986 transitions. [2023-11-12 02:13:07,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49797979797979797 [2023-11-12 02:13:07,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 986 transitions. [2023-11-12 02:13:07,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 986 transitions. [2023-11-12 02:13:07,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:07,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 986 transitions. [2023-11-12 02:13:07,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:07,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:07,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:07,847 INFO L175 Difference]: Start difference. First operand has 53 places, 84 transitions, 375 flow. Second operand 3 states and 986 transitions. [2023-11-12 02:13:07,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 104 transitions, 620 flow [2023-11-12 02:13:07,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 104 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:07,856 INFO L231 Difference]: Finished difference. Result has 54 places, 86 transitions, 386 flow [2023-11-12 02:13:07,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=54, PETRI_TRANSITIONS=86} [2023-11-12 02:13:07,860 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-11-12 02:13:07,860 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 86 transitions, 386 flow [2023-11-12 02:13:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.0) internal successors, (936), 3 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:07,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:07,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:07,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:13:07,862 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -583367936, now seen corresponding path program 1 times [2023-11-12 02:13:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840939292] [2023-11-12 02:13:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:07,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:07,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840939292] [2023-11-12 02:13:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840939292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:07,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:07,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:07,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029411697] [2023-11-12 02:13:07,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:07,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:07,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:07,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:07,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 660 [2023-11-12 02:13:07,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 86 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:07,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:07,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 660 [2023-11-12 02:13:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:08,885 INFO L124 PetriNetUnfolderBase]: 5292/7939 cut-off events. [2023-11-12 02:13:08,885 INFO L125 PetriNetUnfolderBase]: For 1682/1682 co-relation queries the response was YES. [2023-11-12 02:13:08,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17736 conditions, 7939 events. 5292/7939 cut-off events. For 1682/1682 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 44417 event pairs, 2970 based on Foata normal form. 0/5605 useless extension candidates. Maximal degree in co-relation 8791. Up to 5628 conditions per place. [2023-11-12 02:13:08,946 INFO L140 encePairwiseOnDemand]: 655/660 looper letters, 102 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2023-11-12 02:13:08,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 108 transitions, 660 flow [2023-11-12 02:13:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 986 transitions. [2023-11-12 02:13:08,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49797979797979797 [2023-11-12 02:13:08,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 986 transitions. [2023-11-12 02:13:08,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 986 transitions. [2023-11-12 02:13:08,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:08,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 986 transitions. [2023-11-12 02:13:08,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:08,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:08,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:08,961 INFO L175 Difference]: Start difference. First operand has 54 places, 86 transitions, 386 flow. Second operand 3 states and 986 transitions. [2023-11-12 02:13:08,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 108 transitions, 660 flow [2023-11-12 02:13:08,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 108 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:13:08,967 INFO L231 Difference]: Finished difference. Result has 56 places, 88 transitions, 404 flow [2023-11-12 02:13:08,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=56, PETRI_TRANSITIONS=88} [2023-11-12 02:13:08,969 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-11-12 02:13:08,969 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 88 transitions, 404 flow [2023-11-12 02:13:08,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:08,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:08,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:08,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:13:08,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:08,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1890645117, now seen corresponding path program 1 times [2023-11-12 02:13:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:08,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475335038] [2023-11-12 02:13:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:09,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475335038] [2023-11-12 02:13:09,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475335038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963504775] [2023-11-12 02:13:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:09,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:09,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:09,070 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:09,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:13:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:09,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:13:09,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:13:09,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:09,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963504775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:09,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:09,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2023-11-12 02:13:09,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849189403] [2023-11-12 02:13:09,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:09,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:09,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 660 [2023-11-12 02:13:09,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 88 transitions, 404 flow. Second operand has 5 states, 5 states have (on average 284.2) internal successors, (1421), 5 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:09,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 660 [2023-11-12 02:13:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:10,853 INFO L124 PetriNetUnfolderBase]: 6258/9188 cut-off events. [2023-11-12 02:13:10,853 INFO L125 PetriNetUnfolderBase]: For 3404/3404 co-relation queries the response was YES. [2023-11-12 02:13:10,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22945 conditions, 9188 events. 6258/9188 cut-off events. For 3404/3404 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 51795 event pairs, 4451 based on Foata normal form. 114/7150 useless extension candidates. Maximal degree in co-relation 9571. Up to 7339 conditions per place. [2023-11-12 02:13:10,924 INFO L140 encePairwiseOnDemand]: 648/660 looper letters, 98 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2023-11-12 02:13:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 133 transitions, 801 flow [2023-11-12 02:13:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:13:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1782 transitions. [2023-11-12 02:13:10,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-12 02:13:10,932 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1782 transitions. [2023-11-12 02:13:10,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1782 transitions. [2023-11-12 02:13:10,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:10,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1782 transitions. [2023-11-12 02:13:10,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:10,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:10,949 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:10,949 INFO L175 Difference]: Start difference. First operand has 56 places, 88 transitions, 404 flow. Second operand 6 states and 1782 transitions. [2023-11-12 02:13:10,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 133 transitions, 801 flow [2023-11-12 02:13:10,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 133 transitions, 792 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:13:10,962 INFO L231 Difference]: Finished difference. Result has 62 places, 90 transitions, 486 flow [2023-11-12 02:13:10,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=62, PETRI_TRANSITIONS=90} [2023-11-12 02:13:10,964 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-11-12 02:13:10,964 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 90 transitions, 486 flow [2023-11-12 02:13:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.2) internal successors, (1421), 5 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:10,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:10,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:10,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:11,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:13:11,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:11,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1257795308, now seen corresponding path program 1 times [2023-11-12 02:13:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874904718] [2023-11-12 02:13:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:11,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:11,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874904718] [2023-11-12 02:13:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874904718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:11,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:13:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873744475] [2023-11-12 02:13:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:13:11,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 660 [2023-11-12 02:13:11,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 90 transitions, 486 flow. Second operand has 4 states, 4 states have (on average 310.25) internal successors, (1241), 4 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:11,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:11,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 660 [2023-11-12 02:13:11,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:12,366 INFO L124 PetriNetUnfolderBase]: 5336/8078 cut-off events. [2023-11-12 02:13:12,366 INFO L125 PetriNetUnfolderBase]: For 4294/4294 co-relation queries the response was YES. [2023-11-12 02:13:12,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20595 conditions, 8078 events. 5336/8078 cut-off events. For 4294/4294 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 46231 event pairs, 1739 based on Foata normal form. 0/6432 useless extension candidates. Maximal degree in co-relation 8479. Up to 4198 conditions per place. [2023-11-12 02:13:12,431 INFO L140 encePairwiseOnDemand]: 656/660 looper letters, 99 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2023-11-12 02:13:12,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 112 transitions, 796 flow [2023-11-12 02:13:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:13:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1282 transitions. [2023-11-12 02:13:12,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4856060606060606 [2023-11-12 02:13:12,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1282 transitions. [2023-11-12 02:13:12,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1282 transitions. [2023-11-12 02:13:12,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:12,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1282 transitions. [2023-11-12 02:13:12,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 320.5) internal successors, (1282), 4 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:12,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:12,524 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:12,525 INFO L175 Difference]: Start difference. First operand has 62 places, 90 transitions, 486 flow. Second operand 4 states and 1282 transitions. [2023-11-12 02:13:12,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 112 transitions, 796 flow [2023-11-12 02:13:12,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 739 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:13:12,535 INFO L231 Difference]: Finished difference. Result has 61 places, 89 transitions, 447 flow [2023-11-12 02:13:12,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=447, PETRI_PLACES=61, PETRI_TRANSITIONS=89} [2023-11-12 02:13:12,536 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-11-12 02:13:12,537 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 89 transitions, 447 flow [2023-11-12 02:13:12,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 310.25) internal successors, (1241), 4 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:12,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:12,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:12,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:13:12,538 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:12,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1257795309, now seen corresponding path program 1 times [2023-11-12 02:13:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:12,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506903090] [2023-11-12 02:13:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:12,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:12,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:12,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506903090] [2023-11-12 02:13:12,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506903090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:12,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:12,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:13:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858684071] [2023-11-12 02:13:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:12,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:13:12,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:12,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:13:12,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:12,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 660 [2023-11-12 02:13:12,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 89 transitions, 447 flow. Second operand has 5 states, 5 states have (on average 283.6) internal successors, (1418), 5 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:12,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:12,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 660 [2023-11-12 02:13:12,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:14,196 INFO L124 PetriNetUnfolderBase]: 5190/7694 cut-off events. [2023-11-12 02:13:14,197 INFO L125 PetriNetUnfolderBase]: For 4645/4645 co-relation queries the response was YES. [2023-11-12 02:13:14,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20544 conditions, 7694 events. 5190/7694 cut-off events. For 4645/4645 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 42563 event pairs, 3789 based on Foata normal form. 0/6500 useless extension candidates. Maximal degree in co-relation 8689. Up to 6271 conditions per place. [2023-11-12 02:13:14,256 INFO L140 encePairwiseOnDemand]: 648/660 looper letters, 83 selfloop transitions, 32 changer transitions 8/126 dead transitions. [2023-11-12 02:13:14,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 126 transitions, 819 flow [2023-11-12 02:13:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:14,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:13:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1769 transitions. [2023-11-12 02:13:14,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44671717171717173 [2023-11-12 02:13:14,264 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1769 transitions. [2023-11-12 02:13:14,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1769 transitions. [2023-11-12 02:13:14,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:14,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1769 transitions. [2023-11-12 02:13:14,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 294.8333333333333) internal successors, (1769), 6 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:14,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:14,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:14,280 INFO L175 Difference]: Start difference. First operand has 61 places, 89 transitions, 447 flow. Second operand 6 states and 1769 transitions. [2023-11-12 02:13:14,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 126 transitions, 819 flow [2023-11-12 02:13:14,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 126 transitions, 795 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:13:14,298 INFO L231 Difference]: Finished difference. Result has 65 places, 91 transitions, 508 flow [2023-11-12 02:13:14,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=65, PETRI_TRANSITIONS=91} [2023-11-12 02:13:14,300 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-11-12 02:13:14,300 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 91 transitions, 508 flow [2023-11-12 02:13:14,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 283.6) internal successors, (1418), 5 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:14,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:14,301 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:14,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:13:14,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:14,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1675549137, now seen corresponding path program 1 times [2023-11-12 02:13:14,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:14,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061749438] [2023-11-12 02:13:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061749438] [2023-11-12 02:13:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061749438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047827453] [2023-11-12 02:13:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:14,392 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:14,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:13:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:14,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:13:14,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:13:14,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:14,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047827453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:14,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:14,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 8 [2023-11-12 02:13:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120166867] [2023-11-12 02:13:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:13:14,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:13:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:14,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 660 [2023-11-12 02:13:14,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 91 transitions, 508 flow. Second operand has 6 states, 6 states have (on average 281.1666666666667) internal successors, (1687), 6 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:14,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:14,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 660 [2023-11-12 02:13:14,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:15,861 INFO L124 PetriNetUnfolderBase]: 4724/6972 cut-off events. [2023-11-12 02:13:15,862 INFO L125 PetriNetUnfolderBase]: For 4105/4105 co-relation queries the response was YES. [2023-11-12 02:13:15,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18934 conditions, 6972 events. 4724/6972 cut-off events. For 4105/4105 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 37454 event pairs, 3499 based on Foata normal form. 38/5862 useless extension candidates. Maximal degree in co-relation 14652. Up to 6271 conditions per place. [2023-11-12 02:13:16,012 INFO L140 encePairwiseOnDemand]: 648/660 looper letters, 52 selfloop transitions, 22 changer transitions 39/116 dead transitions. [2023-11-12 02:13:16,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 116 transitions, 817 flow [2023-11-12 02:13:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:13:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1751 transitions. [2023-11-12 02:13:16,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44217171717171716 [2023-11-12 02:13:16,021 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1751 transitions. [2023-11-12 02:13:16,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1751 transitions. [2023-11-12 02:13:16,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:16,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1751 transitions. [2023-11-12 02:13:16,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 291.8333333333333) internal successors, (1751), 6 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:16,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:16,036 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 660.0) internal successors, (4620), 7 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:16,036 INFO L175 Difference]: Start difference. First operand has 65 places, 91 transitions, 508 flow. Second operand 6 states and 1751 transitions. [2023-11-12 02:13:16,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 116 transitions, 817 flow [2023-11-12 02:13:16,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 760 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:13:16,105 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 401 flow [2023-11-12 02:13:16,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=401, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-11-12 02:13:16,106 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-11-12 02:13:16,107 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 401 flow [2023-11-12 02:13:16,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 281.1666666666667) internal successors, (1687), 6 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:16,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:16,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:16,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:13:16,313 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:16,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1095324110, now seen corresponding path program 1 times [2023-11-12 02:13:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:16,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234593942] [2023-11-12 02:13:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:13:16,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:16,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234593942] [2023-11-12 02:13:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234593942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:16,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569440423] [2023-11-12 02:13:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:16,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:16,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:16,442 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:16,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:13:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:16,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:13:16,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:16,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:16,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569440423] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:16,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:16,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2023-11-12 02:13:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671882986] [2023-11-12 02:13:16,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:13:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:13:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:13:17,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 660 [2023-11-12 02:13:17,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 401 flow. Second operand has 13 states, 13 states have (on average 275.84615384615387) internal successors, (3586), 13 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:17,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 660 [2023-11-12 02:13:17,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:18,558 INFO L124 PetriNetUnfolderBase]: 4689/6959 cut-off events. [2023-11-12 02:13:18,558 INFO L125 PetriNetUnfolderBase]: For 4454/4454 co-relation queries the response was YES. [2023-11-12 02:13:18,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19428 conditions, 6959 events. 4689/6959 cut-off events. For 4454/4454 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 37027 event pairs, 1631 based on Foata normal form. 98/5999 useless extension candidates. Maximal degree in co-relation 15124. Up to 2011 conditions per place. [2023-11-12 02:13:18,600 INFO L140 encePairwiseOnDemand]: 645/660 looper letters, 141 selfloop transitions, 38 changer transitions 0/182 dead transitions. [2023-11-12 02:13:18,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 182 transitions, 1141 flow [2023-11-12 02:13:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:13:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-12 02:13:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3156 transitions. [2023-11-12 02:13:18,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43471074380165287 [2023-11-12 02:13:18,613 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3156 transitions. [2023-11-12 02:13:18,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3156 transitions. [2023-11-12 02:13:18,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:18,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3156 transitions. [2023-11-12 02:13:18,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 286.90909090909093) internal successors, (3156), 11 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:18,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 660.0) internal successors, (7920), 12 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:18,638 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 660.0) internal successors, (7920), 12 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:18,638 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 401 flow. Second operand 11 states and 3156 transitions. [2023-11-12 02:13:18,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 182 transitions, 1141 flow [2023-11-12 02:13:18,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 182 transitions, 965 flow, removed 44 selfloop flow, removed 10 redundant places. [2023-11-12 02:13:18,690 INFO L231 Difference]: Finished difference. Result has 64 places, 84 transitions, 432 flow [2023-11-12 02:13:18,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=432, PETRI_PLACES=64, PETRI_TRANSITIONS=84} [2023-11-12 02:13:18,691 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-11-12 02:13:18,691 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 84 transitions, 432 flow [2023-11-12 02:13:18,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 275.84615384615387) internal successors, (3586), 13 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:18,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:18,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:18,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:18,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:13:18,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:18,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1112937512, now seen corresponding path program 1 times [2023-11-12 02:13:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902104300] [2023-11-12 02:13:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902104300] [2023-11-12 02:13:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902104300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573347747] [2023-11-12 02:13:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:19,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:19,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:19,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:13:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:19,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:13:19,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:19,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:19,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573347747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:19,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:19,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2023-11-12 02:13:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693765808] [2023-11-12 02:13:19,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:19,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:13:19,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:13:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:13:20,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 660 [2023-11-12 02:13:20,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 84 transitions, 432 flow. Second operand has 15 states, 15 states have (on average 274.06666666666666) internal successors, (4111), 15 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:20,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:20,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 660 [2023-11-12 02:13:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:21,383 INFO L124 PetriNetUnfolderBase]: 4655/6801 cut-off events. [2023-11-12 02:13:21,383 INFO L125 PetriNetUnfolderBase]: For 6174/6174 co-relation queries the response was YES. [2023-11-12 02:13:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18535 conditions, 6801 events. 4655/6801 cut-off events. For 6174/6174 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 34882 event pairs, 1978 based on Foata normal form. 0/5747 useless extension candidates. Maximal degree in co-relation 13643. Up to 2968 conditions per place. [2023-11-12 02:13:21,433 INFO L140 encePairwiseOnDemand]: 646/660 looper letters, 110 selfloop transitions, 39 changer transitions 16/168 dead transitions. [2023-11-12 02:13:21,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 168 transitions, 1089 flow [2023-11-12 02:13:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:13:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:13:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3380 transitions. [2023-11-12 02:13:21,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2023-11-12 02:13:21,447 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3380 transitions. [2023-11-12 02:13:21,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3380 transitions. [2023-11-12 02:13:21,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:21,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3380 transitions. [2023-11-12 02:13:21,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 281.6666666666667) internal successors, (3380), 12 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:21,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 660.0) internal successors, (8580), 13 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:21,474 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 660.0) internal successors, (8580), 13 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:21,474 INFO L175 Difference]: Start difference. First operand has 64 places, 84 transitions, 432 flow. Second operand 12 states and 3380 transitions. [2023-11-12 02:13:21,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 168 transitions, 1089 flow [2023-11-12 02:13:21,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 168 transitions, 1014 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-11-12 02:13:21,487 INFO L231 Difference]: Finished difference. Result has 68 places, 87 transitions, 457 flow [2023-11-12 02:13:21,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=457, PETRI_PLACES=68, PETRI_TRANSITIONS=87} [2023-11-12 02:13:21,488 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-11-12 02:13:21,488 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 87 transitions, 457 flow [2023-11-12 02:13:21,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 274.06666666666666) internal successors, (4111), 15 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:21,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:21,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:21,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:21,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:13:21,697 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:21,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2141144740, now seen corresponding path program 1 times [2023-11-12 02:13:21,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:21,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017458113] [2023-11-12 02:13:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:13:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017458113] [2023-11-12 02:13:21,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017458113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191412690] [2023-11-12 02:13:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:21,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:21,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:21,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:13:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:21,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:13:21,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:22,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:13:22,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191412690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:22,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:22,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 15 [2023-11-12 02:13:22,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466311620] [2023-11-12 02:13:22,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:13:22,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:13:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:13:23,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 660 [2023-11-12 02:13:23,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 87 transitions, 457 flow. Second operand has 15 states, 15 states have (on average 274.0) internal successors, (4110), 15 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:23,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:23,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 660 [2023-11-12 02:13:23,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:24,685 INFO L124 PetriNetUnfolderBase]: 5536/8114 cut-off events. [2023-11-12 02:13:24,685 INFO L125 PetriNetUnfolderBase]: For 7139/7139 co-relation queries the response was YES. [2023-11-12 02:13:24,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23696 conditions, 8114 events. 5536/8114 cut-off events. For 7139/7139 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 42371 event pairs, 1575 based on Foata normal form. 58/6949 useless extension candidates. Maximal degree in co-relation 20498. Up to 2874 conditions per place. [2023-11-12 02:13:24,720 INFO L140 encePairwiseOnDemand]: 645/660 looper letters, 108 selfloop transitions, 24 changer transitions 65/200 dead transitions. [2023-11-12 02:13:24,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 200 transitions, 1333 flow [2023-11-12 02:13:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:13:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:13:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3404 transitions. [2023-11-12 02:13:24,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297979797979798 [2023-11-12 02:13:24,732 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3404 transitions. [2023-11-12 02:13:24,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3404 transitions. [2023-11-12 02:13:24,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:24,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3404 transitions. [2023-11-12 02:13:24,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 283.6666666666667) internal successors, (3404), 12 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:24,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 660.0) internal successors, (8580), 13 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:24,756 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 660.0) internal successors, (8580), 13 states have internal predecessors, (8580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:24,757 INFO L175 Difference]: Start difference. First operand has 68 places, 87 transitions, 457 flow. Second operand 12 states and 3404 transitions. [2023-11-12 02:13:24,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 200 transitions, 1333 flow [2023-11-12 02:13:24,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 200 transitions, 1292 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-12 02:13:24,768 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 424 flow [2023-11-12 02:13:24,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-11-12 02:13:24,769 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 24 predicate places. [2023-11-12 02:13:24,769 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 424 flow [2023-11-12 02:13:24,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 274.0) internal successors, (4110), 15 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:24,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:24,771 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:24,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:24,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:13:24,977 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:24,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1100678494, now seen corresponding path program 1 times [2023-11-12 02:13:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:24,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799993251] [2023-11-12 02:13:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:13:25,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:25,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799993251] [2023-11-12 02:13:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799993251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:25,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:25,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:13:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035775511] [2023-11-12 02:13:25,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:25,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:25,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 660 [2023-11-12 02:13:25,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:25,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:25,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 660 [2023-11-12 02:13:25,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:25,753 INFO L124 PetriNetUnfolderBase]: 4341/6411 cut-off events. [2023-11-12 02:13:25,753 INFO L125 PetriNetUnfolderBase]: For 10007/10007 co-relation queries the response was YES. [2023-11-12 02:13:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20978 conditions, 6411 events. 4341/6411 cut-off events. For 10007/10007 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 34240 event pairs, 1104 based on Foata normal form. 268/5847 useless extension candidates. Maximal degree in co-relation 20816. Up to 3641 conditions per place. [2023-11-12 02:13:25,794 INFO L140 encePairwiseOnDemand]: 657/660 looper letters, 85 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-11-12 02:13:25,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 698 flow [2023-11-12 02:13:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 975 transitions. [2023-11-12 02:13:25,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-12 02:13:25,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 975 transitions. [2023-11-12 02:13:25,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 975 transitions. [2023-11-12 02:13:25,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:25,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 975 transitions. [2023-11-12 02:13:25,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:25,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:25,806 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 660.0) internal successors, (2640), 4 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:25,806 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 424 flow. Second operand 3 states and 975 transitions. [2023-11-12 02:13:25,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 698 flow [2023-11-12 02:13:25,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 640 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-12 02:13:25,833 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 367 flow [2023-11-12 02:13:25,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2023-11-12 02:13:25,834 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-11-12 02:13:25,834 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 367 flow [2023-11-12 02:13:25,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:25,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:25,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:25,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:13:25,835 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:25,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:25,836 INFO L85 PathProgramCache]: Analyzing trace with hash -624263480, now seen corresponding path program 1 times [2023-11-12 02:13:25,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:25,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509374250] [2023-11-12 02:13:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:25,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:13:25,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:25,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509374250] [2023-11-12 02:13:25,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509374250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:25,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079253156] [2023-11-12 02:13:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:25,950 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:25,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:13:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:26,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:26,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:13:26,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:26,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079253156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:26,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:26,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-12 02:13:26,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478260159] [2023-11-12 02:13:26,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:26,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:26,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:26,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:26,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:26,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 660 [2023-11-12 02:13:26,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 367 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:26,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:26,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 660 [2023-11-12 02:13:26,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:27,013 INFO L124 PetriNetUnfolderBase]: 3835/5756 cut-off events. [2023-11-12 02:13:27,013 INFO L125 PetriNetUnfolderBase]: For 7295/7295 co-relation queries the response was YES. [2023-11-12 02:13:27,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 5756 events. 3835/5756 cut-off events. For 7295/7295 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 30122 event pairs, 761 based on Foata normal form. 280/5291 useless extension candidates. Maximal degree in co-relation 17455. Up to 2670 conditions per place. [2023-11-12 02:13:27,053 INFO L140 encePairwiseOnDemand]: 656/660 looper letters, 101 selfloop transitions, 5 changer transitions 0/109 dead transitions. [2023-11-12 02:13:27,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 109 transitions, 749 flow [2023-11-12 02:13:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:13:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1299 transitions. [2023-11-12 02:13:27,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49204545454545456 [2023-11-12 02:13:27,058 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1299 transitions. [2023-11-12 02:13:27,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1299 transitions. [2023-11-12 02:13:27,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:27,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1299 transitions. [2023-11-12 02:13:27,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.75) internal successors, (1299), 4 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:27,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:27,068 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 660.0) internal successors, (3300), 5 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:27,068 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 367 flow. Second operand 4 states and 1299 transitions. [2023-11-12 02:13:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 109 transitions, 749 flow [2023-11-12 02:13:27,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 109 transitions, 689 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-12 02:13:27,091 INFO L231 Difference]: Finished difference. Result has 55 places, 68 transitions, 319 flow [2023-11-12 02:13:27,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=55, PETRI_TRANSITIONS=68} [2023-11-12 02:13:27,092 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-11-12 02:13:27,092 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 68 transitions, 319 flow [2023-11-12 02:13:27,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:27,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:27,093 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:27,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:27,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:13:27,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:27,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1759915969, now seen corresponding path program 2 times [2023-11-12 02:13:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630662917] [2023-11-12 02:13:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:13:27,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:27,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630662917] [2023-11-12 02:13:27,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630662917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:27,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017904838] [2023-11-12 02:13:27,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:27,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:27,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:27,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:27,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:13:27,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:13:27,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:27,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:27,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 02:13:27,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 02:13:27,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017904838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:27,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:27,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 2, 2] total 8 [2023-11-12 02:13:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141071669] [2023-11-12 02:13:27,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:27,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:13:27,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:13:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:13:28,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 660 [2023-11-12 02:13:28,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 68 transitions, 319 flow. Second operand has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:28,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:28,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 660 [2023-11-12 02:13:28,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:29,642 INFO L124 PetriNetUnfolderBase]: 7032/10217 cut-off events. [2023-11-12 02:13:29,642 INFO L125 PetriNetUnfolderBase]: For 9867/9867 co-relation queries the response was YES. [2023-11-12 02:13:29,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30864 conditions, 10217 events. 7032/10217 cut-off events. For 9867/9867 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 54503 event pairs, 1658 based on Foata normal form. 0/9122 useless extension candidates. Maximal degree in co-relation 15388. Up to 2247 conditions per place. [2023-11-12 02:13:29,707 INFO L140 encePairwiseOnDemand]: 646/660 looper letters, 149 selfloop transitions, 54 changer transitions 21/227 dead transitions. [2023-11-12 02:13:29,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 227 transitions, 1492 flow [2023-11-12 02:13:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:13:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-12 02:13:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4256 transitions. [2023-11-12 02:13:29,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298989898989899 [2023-11-12 02:13:29,718 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4256 transitions. [2023-11-12 02:13:29,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4256 transitions. [2023-11-12 02:13:29,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:29,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4256 transitions. [2023-11-12 02:13:29,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 283.73333333333335) internal successors, (4256), 15 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:29,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 660.0) internal successors, (10560), 16 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:29,751 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 660.0) internal successors, (10560), 16 states have internal predecessors, (10560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:29,751 INFO L175 Difference]: Start difference. First operand has 55 places, 68 transitions, 319 flow. Second operand 15 states and 4256 transitions. [2023-11-12 02:13:29,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 227 transitions, 1492 flow [2023-11-12 02:13:29,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 227 transitions, 1443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:29,783 INFO L231 Difference]: Finished difference. Result has 70 places, 92 transitions, 603 flow [2023-11-12 02:13:29,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=660, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=603, PETRI_PLACES=70, PETRI_TRANSITIONS=92} [2023-11-12 02:13:29,784 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2023-11-12 02:13:29,784 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 92 transitions, 603 flow [2023-11-12 02:13:29,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 276.3) internal successors, (2763), 10 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:29,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:29,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:29,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:29,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:29,991 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 20 more)] === [2023-11-12 02:13:29,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash -221873216, now seen corresponding path program 2 times [2023-11-12 02:13:29,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:29,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366066054] [2023-11-12 02:13:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:29,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:13:30,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:30,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366066054] [2023-11-12 02:13:30,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366066054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:30,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889841889] [2023-11-12 02:13:30,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:30,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:30,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:30,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:30,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_025fed22-8bc4-43a9-9a47-482a5fa2ed7a/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:13:30,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:13:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:30,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:30,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 02:13:30,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 02:13:30,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889841889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:30,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:30,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 2, 2] total 11 [2023-11-12 02:13:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063314644] [2023-11-12 02:13:30,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:13:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:30,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:13:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:13:31,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 660 [2023-11-12 02:13:31,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 92 transitions, 603 flow. Second operand has 12 states, 12 states have (on average 278.0833333333333) internal successors, (3337), 12 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:31,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:31,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 660 [2023-11-12 02:13:31,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand