./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ --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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:37:43,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:37:43,197 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:37:43,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:37:43,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:37:43,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:37:43,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:37:43,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:37:43,270 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:37:43,276 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:37:43,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:37:43,278 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:37:43,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:37:43,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:37:43,281 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:37:43,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:37:43,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:37:43,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:37:43,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:37:43,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:37:43,285 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:37:43,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:37:43,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:37:43,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:37:43,287 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:37:43,288 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:37:43,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:37:43,289 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:37:43,290 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:37:43,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:37:43,292 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:37:43,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:37:43,293 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:37:43,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:43,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:37:43,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:37:43,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:37:43,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:37:43,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:37:43,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:37:43,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:37:43,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:37:43,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:37:43,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:37:43,307 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_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2023-11-23 22:37:43,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:37:43,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:37:43,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:37:43,635 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:37:43,635 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:37:43,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-23 22:37:46,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:37:47,200 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:37:47,201 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2023-11-23 22:37:47,209 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/data/86de1435c/f83d072e3e3f4485bd5ad64dc2b639e1/FLAGb3956c063 [2023-11-23 22:37:47,221 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/data/86de1435c/f83d072e3e3f4485bd5ad64dc2b639e1 [2023-11-23 22:37:47,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:37:47,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:37:47,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:47,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:37:47,233 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:37:47,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bfa40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47, skipping insertion in model container [2023-11-23 22:37:47,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,264 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:37:47,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:47,483 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:37:47,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:37:47,521 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:37:47,521 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:37:47,530 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:37:47,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47 WrapperNode [2023-11-23 22:37:47,530 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:37:47,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:47,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:37:47,532 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:37:47,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,579 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 109 [2023-11-23 22:37:47,580 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:37:47,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:37:47,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:37:47,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:37:47,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,596 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,617 INFO L189 HeapSplitter]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 7, 2] [2023-11-23 22:37:47,617 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,617 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,634 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:37:47,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:37:47,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:37:47,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:37:47,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (1/1) ... [2023-11-23 22:37:47,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:37:47,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:47,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:37:47,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:37:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:37:47,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:37:47,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:37:47,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:37:47,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:37:47,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 22:37:47,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 22:37:47,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:37:47,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:37:47,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:37:47,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 22:37:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 22:37:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:37:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:37:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:37:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:37:47,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:37:47,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:37:47,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:37:47,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:37:47,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 22:37:47,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 22:37:47,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:37:47,737 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:37:47,877 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:37:47,879 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:37:48,228 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:37:48,548 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:37:48,549 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 22:37:48,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:48 BoogieIcfgContainer [2023-11-23 22:37:48,549 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:37:48,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:37:48,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:37:48,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:37:48,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:37:47" (1/3) ... [2023-11-23 22:37:48,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6586ff4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:48, skipping insertion in model container [2023-11-23 22:37:48,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:37:47" (2/3) ... [2023-11-23 22:37:48,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6586ff4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:37:48, skipping insertion in model container [2023-11-23 22:37:48,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:48" (3/3) ... [2023-11-23 22:37:48,560 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2023-11-23 22:37:48,570 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:37:48,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:37:48,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 22:37:48,584 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:37:48,713 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 22:37:48,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 119 flow [2023-11-23 22:37:48,794 INFO L124 PetriNetUnfolderBase]: 4/46 cut-off events. [2023-11-23 22:37:48,794 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:37:48,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 4/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 100 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-23 22:37:48,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 49 transitions, 119 flow [2023-11-23 22:37:48,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 103 flow [2023-11-23 22:37:48,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:37:48,825 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;@7f417e8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:37:48,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-23 22:37:48,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:37:48,832 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-23 22:37:48,832 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:37:48,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:48,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 22:37:48,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:48,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash 488644, now seen corresponding path program 1 times [2023-11-23 22:37:48,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:48,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041449838] [2023-11-23 22:37:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:48,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:49,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041449838] [2023-11-23 22:37:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041449838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:49,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:37:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478389471] [2023-11-23 22:37:49,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:49,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:49,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-23 22:37:49,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:49,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:49,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-23 22:37:49,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:49,629 INFO L124 PetriNetUnfolderBase]: 467/874 cut-off events. [2023-11-23 22:37:49,629 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-23 22:37:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1623 conditions, 874 events. 467/874 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4482 event pairs, 333 based on Foata normal form. 1/810 useless extension candidates. Maximal degree in co-relation 1350. Up to 681 conditions per place. [2023-11-23 22:37:49,645 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 27 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-11-23 22:37:49,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 171 flow [2023-11-23 22:37:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:37:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2023-11-23 22:37:49,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5561224489795918 [2023-11-23 22:37:49,660 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 109 transitions. [2023-11-23 22:37:49,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 109 transitions. [2023-11-23 22:37:49,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:49,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 109 transitions. [2023-11-23 22:37:49,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:49,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:49,678 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:49,680 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 103 flow. Second operand 4 states and 109 transitions. [2023-11-23 22:37:49,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 171 flow [2023-11-23 22:37:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 162 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-23 22:37:49,692 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 123 flow [2023-11-23 22:37:49,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-11-23 22:37:49,698 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-11-23 22:37:49,698 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 123 flow [2023-11-23 22:37:49,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:49,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:49,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 22:37:49,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:37:49,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:49,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1672769589, now seen corresponding path program 1 times [2023-11-23 22:37:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:49,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001866116] [2023-11-23 22:37:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:49,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:49,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:49,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001866116] [2023-11-23 22:37:49,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001866116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:49,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266442753] [2023-11-23 22:37:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:49,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:49,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:49,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:49,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:37:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:49,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:37:49,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:50,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266442753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:37:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 22:37:50,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038866506] [2023-11-23 22:37:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:50,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:37:50,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:37:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:37:50,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-23 22:37:50,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:50,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:50,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-23 22:37:50,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:50,347 INFO L124 PetriNetUnfolderBase]: 467/873 cut-off events. [2023-11-23 22:37:50,353 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-23 22:37:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 873 events. 467/873 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4478 event pairs, 333 based on Foata normal form. 1/810 useless extension candidates. Maximal degree in co-relation 1580. Up to 676 conditions per place. [2023-11-23 22:37:50,363 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 23 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-11-23 22:37:50,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 179 flow [2023-11-23 22:37:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:37:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:37:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2023-11-23 22:37:50,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2023-11-23 22:37:50,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 145 transitions. [2023-11-23 22:37:50,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 145 transitions. [2023-11-23 22:37:50,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:50,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 145 transitions. [2023-11-23 22:37:50,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:50,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:50,378 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:50,378 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 123 flow. Second operand 6 states and 145 transitions. [2023-11-23 22:37:50,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 179 flow [2023-11-23 22:37:50,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:50,384 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 130 flow [2023-11-23 22:37:50,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-23 22:37:50,386 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-11-23 22:37:50,386 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 130 flow [2023-11-23 22:37:50,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:50,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:50,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-23 22:37:50,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:50,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:50,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:50,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 316250188, now seen corresponding path program 1 times [2023-11-23 22:37:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:50,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264336069] [2023-11-23 22:37:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:50,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264336069] [2023-11-23 22:37:50,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264336069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:50,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442228403] [2023-11-23 22:37:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:50,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:50,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:50,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:37:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:50,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:37:50,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:50,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:50,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442228403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:50,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:50,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-23 22:37:50,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923467385] [2023-11-23 22:37:50,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:50,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:37:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:37:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:37:50,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-23 22:37:50,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 130 flow. Second operand has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:50,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:50,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-23 22:37:50,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:51,206 INFO L124 PetriNetUnfolderBase]: 470/885 cut-off events. [2023-11-23 22:37:51,206 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-23 22:37:51,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 885 events. 470/885 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4569 event pairs, 333 based on Foata normal form. 3/822 useless extension candidates. Maximal degree in co-relation 1581. Up to 683 conditions per place. [2023-11-23 22:37:51,215 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 26 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2023-11-23 22:37:51,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 262 flow [2023-11-23 22:37:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:37:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:37:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2023-11-23 22:37:51,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47346938775510206 [2023-11-23 22:37:51,218 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 232 transitions. [2023-11-23 22:37:51,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 232 transitions. [2023-11-23 22:37:51,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:51,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 232 transitions. [2023-11-23 22:37:51,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 23.2) internal successors, (232), 10 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,223 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,223 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 130 flow. Second operand 10 states and 232 transitions. [2023-11-23 22:37:51,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 262 flow [2023-11-23 22:37:51,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 216 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-23 22:37:51,226 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 182 flow [2023-11-23 22:37:51,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-11-23 22:37:51,227 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2023-11-23 22:37:51,227 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 182 flow [2023-11-23 22:37:51,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.083333333333332) internal successors, (241), 12 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:51,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:51,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:51,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:51,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:51,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -828421432, now seen corresponding path program 1 times [2023-11-23 22:37:51,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:51,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219621169] [2023-11-23 22:37:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219621169] [2023-11-23 22:37:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219621169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:51,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:51,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:37:51,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663882443] [2023-11-23 22:37:51,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:51,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:51,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:37:51,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:51,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:37:51,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:51,849 INFO L124 PetriNetUnfolderBase]: 1100/1898 cut-off events. [2023-11-23 22:37:51,849 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-23 22:37:51,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 1898 events. 1100/1898 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10439 event pairs, 467 based on Foata normal form. 42/1844 useless extension candidates. Maximal degree in co-relation 3566. Up to 1152 conditions per place. [2023-11-23 22:37:51,868 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 67 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-11-23 22:37:51,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 390 flow [2023-11-23 22:37:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:37:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2023-11-23 22:37:51,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2023-11-23 22:37:51,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 133 transitions. [2023-11-23 22:37:51,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 133 transitions. [2023-11-23 22:37:51,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:51,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 133 transitions. [2023-11-23 22:37:51,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,872 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 182 flow. Second operand 4 states and 133 transitions. [2023-11-23 22:37:51,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 390 flow [2023-11-23 22:37:51,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 379 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-23 22:37:51,876 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 200 flow [2023-11-23 22:37:51,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-11-23 22:37:51,878 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2023-11-23 22:37:51,878 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 200 flow [2023-11-23 22:37:51,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:51,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:51,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:37:51,879 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:51,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1786839766, now seen corresponding path program 1 times [2023-11-23 22:37:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:51,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96699928] [2023-11-23 22:37:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:51,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:51,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96699928] [2023-11-23 22:37:51,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96699928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:51,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:37:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993190561] [2023-11-23 22:37:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:51,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:37:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:37:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:37:51,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:37:51,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:51,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:51,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:37:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:52,384 INFO L124 PetriNetUnfolderBase]: 1796/2971 cut-off events. [2023-11-23 22:37:52,384 INFO L125 PetriNetUnfolderBase]: For 769/1064 co-relation queries the response was YES. [2023-11-23 22:37:52,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6362 conditions, 2971 events. 1796/2971 cut-off events. For 769/1064 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16896 event pairs, 901 based on Foata normal form. 167/2987 useless extension candidates. Maximal degree in co-relation 6326. Up to 1794 conditions per place. [2023-11-23 22:37:52,417 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 73 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-11-23 22:37:52,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 454 flow [2023-11-23 22:37:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:37:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:37:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2023-11-23 22:37:52,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2023-11-23 22:37:52,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 133 transitions. [2023-11-23 22:37:52,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 133 transitions. [2023-11-23 22:37:52,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:52,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 133 transitions. [2023-11-23 22:37:52,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,421 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,421 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 200 flow. Second operand 4 states and 133 transitions. [2023-11-23 22:37:52,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 454 flow [2023-11-23 22:37:52,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:52,425 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 226 flow [2023-11-23 22:37:52,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-11-23 22:37:52,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2023-11-23 22:37:52,427 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 226 flow [2023-11-23 22:37:52,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:52,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:52,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:37:52,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2140939290, now seen corresponding path program 1 times [2023-11-23 22:37:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:52,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498568050] [2023-11-23 22:37:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:52,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498568050] [2023-11-23 22:37:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498568050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:52,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:52,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:37:52,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841677061] [2023-11-23 22:37:52,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:52,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:37:52,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:52,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:37:52,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:37:52,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2023-11-23 22:37:52,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:52,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2023-11-23 22:37:52,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:52,792 INFO L124 PetriNetUnfolderBase]: 1115/1976 cut-off events. [2023-11-23 22:37:52,792 INFO L125 PetriNetUnfolderBase]: For 806/1119 co-relation queries the response was YES. [2023-11-23 22:37:52,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4469 conditions, 1976 events. 1115/1976 cut-off events. For 806/1119 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11408 event pairs, 765 based on Foata normal form. 110/1959 useless extension candidates. Maximal degree in co-relation 4438. Up to 1553 conditions per place. [2023-11-23 22:37:52,812 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 39 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-23 22:37:52,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 305 flow [2023-11-23 22:37:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:37:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:37:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-23 22:37:52,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2023-11-23 22:37:52,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-23 22:37:52,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-23 22:37:52,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:52,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-23 22:37:52,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,815 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 226 flow. Second operand 3 states and 92 transitions. [2023-11-23 22:37:52,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 305 flow [2023-11-23 22:37:52,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:37:52,819 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 224 flow [2023-11-23 22:37:52,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2023-11-23 22:37:52,820 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 18 predicate places. [2023-11-23 22:37:52,821 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 224 flow [2023-11-23 22:37:52,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:52,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:37:52,821 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:52,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1418473365, now seen corresponding path program 1 times [2023-11-23 22:37:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:52,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826877150] [2023-11-23 22:37:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:52,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:37:52,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:52,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826877150] [2023-11-23 22:37:52,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826877150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:52,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:37:52,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:37:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177775453] [2023-11-23 22:37:52,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:37:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:37:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:37:52,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:37:52,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:52,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:52,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:37:52,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:53,305 INFO L124 PetriNetUnfolderBase]: 1579/2472 cut-off events. [2023-11-23 22:37:53,305 INFO L125 PetriNetUnfolderBase]: For 948/1380 co-relation queries the response was YES. [2023-11-23 22:37:53,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5757 conditions, 2472 events. 1579/2472 cut-off events. For 948/1380 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12903 event pairs, 405 based on Foata normal form. 235/2578 useless extension candidates. Maximal degree in co-relation 5733. Up to 821 conditions per place. [2023-11-23 22:37:53,330 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 69 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-11-23 22:37:53,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 488 flow [2023-11-23 22:37:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:37:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:37:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2023-11-23 22:37:53,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2023-11-23 22:37:53,332 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 145 transitions. [2023-11-23 22:37:53,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 145 transitions. [2023-11-23 22:37:53,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:53,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 145 transitions. [2023-11-23 22:37:53,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:53,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:53,334 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:53,334 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 224 flow. Second operand 5 states and 145 transitions. [2023-11-23 22:37:53,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 488 flow [2023-11-23 22:37:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:37:53,338 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 234 flow [2023-11-23 22:37:53,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=234, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-11-23 22:37:53,340 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-11-23 22:37:53,340 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 234 flow [2023-11-23 22:37:53,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:53,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:53,340 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-23 22:37:53,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:37:53,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:53,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1289947357, now seen corresponding path program 2 times [2023-11-23 22:37:53,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:53,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746904173] [2023-11-23 22:37:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746904173] [2023-11-23 22:37:53,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746904173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577008563] [2023-11-23 22:37:53,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:37:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:53,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:53,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:37:53,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:37:53,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:37:53,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:37:53,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 22:37:53,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 22:37:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577008563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:53,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-23 22:37:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866179221] [2023-11-23 22:37:53,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 22:37:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 22:37:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-23 22:37:53,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-23 22:37:53,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 234 flow. Second operand has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:53,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:53,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-23 22:37:53,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:54,205 INFO L124 PetriNetUnfolderBase]: 1116/1811 cut-off events. [2023-11-23 22:37:54,205 INFO L125 PetriNetUnfolderBase]: For 870/1146 co-relation queries the response was YES. [2023-11-23 22:37:54,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4501 conditions, 1811 events. 1116/1811 cut-off events. For 870/1146 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9377 event pairs, 765 based on Foata normal form. 99/1778 useless extension candidates. Maximal degree in co-relation 4462. Up to 1545 conditions per place. [2023-11-23 22:37:54,223 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 26 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2023-11-23 22:37:54,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 61 transitions, 330 flow [2023-11-23 22:37:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:37:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 22:37:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2023-11-23 22:37:54,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-11-23 22:37:54,226 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 308 transitions. [2023-11-23 22:37:54,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 308 transitions. [2023-11-23 22:37:54,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:54,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 308 transitions. [2023-11-23 22:37:54,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 22.0) internal successors, (308), 14 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:54,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:54,230 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:54,230 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 234 flow. Second operand 14 states and 308 transitions. [2023-11-23 22:37:54,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 61 transitions, 330 flow [2023-11-23 22:37:54,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 61 transitions, 300 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-11-23 22:37:54,236 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 248 flow [2023-11-23 22:37:54,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=248, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2023-11-23 22:37:54,237 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-11-23 22:37:54,237 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 248 flow [2023-11-23 22:37:54,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.142857142857142) internal successors, (282), 14 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:54,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:54,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:54,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:54,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 22:37:54,459 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:54,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:54,460 INFO L85 PathProgramCache]: Analyzing trace with hash -427199221, now seen corresponding path program 1 times [2023-11-23 22:37:54,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:54,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836190902] [2023-11-23 22:37:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:54,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:37:54,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836190902] [2023-11-23 22:37:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836190902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471800445] [2023-11-23 22:37:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:54,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:54,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:54,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:54,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:37:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:54,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:37:54,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:54,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471800445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:54,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:54,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-11-23 22:37:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317307735] [2023-11-23 22:37:54,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:54,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 22:37:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 22:37:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:37:55,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:37:55,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 248 flow. Second operand has 19 states, 19 states have (on average 17.0) internal successors, (323), 19 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:55,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:55,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:37:55,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:56,305 INFO L124 PetriNetUnfolderBase]: 3100/4790 cut-off events. [2023-11-23 22:37:56,305 INFO L125 PetriNetUnfolderBase]: For 1469/1951 co-relation queries the response was YES. [2023-11-23 22:37:56,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11366 conditions, 4790 events. 3100/4790 cut-off events. For 1469/1951 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 27290 event pairs, 538 based on Foata normal form. 294/4939 useless extension candidates. Maximal degree in co-relation 6822. Up to 716 conditions per place. [2023-11-23 22:37:56,346 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 157 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2023-11-23 22:37:56,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 194 transitions, 995 flow [2023-11-23 22:37:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:37:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-23 22:37:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 367 transitions. [2023-11-23 22:37:56,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349854227405247 [2023-11-23 22:37:56,349 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 367 transitions. [2023-11-23 22:37:56,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 367 transitions. [2023-11-23 22:37:56,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:56,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 367 transitions. [2023-11-23 22:37:56,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 26.214285714285715) internal successors, (367), 14 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:56,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:56,353 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:56,353 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 248 flow. Second operand 14 states and 367 transitions. [2023-11-23 22:37:56,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 194 transitions, 995 flow [2023-11-23 22:37:56,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 194 transitions, 927 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-23 22:37:56,368 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 252 flow [2023-11-23 22:37:56,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=252, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-11-23 22:37:56,369 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2023-11-23 22:37:56,369 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 252 flow [2023-11-23 22:37:56,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.0) internal successors, (323), 19 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:56,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:56,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:56,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:56,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:56,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1023001883, now seen corresponding path program 1 times [2023-11-23 22:37:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:56,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775558375] [2023-11-23 22:37:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:37:56,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:56,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775558375] [2023-11-23 22:37:56,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775558375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:56,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607825473] [2023-11-23 22:37:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:56,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:56,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:56,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:56,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:37:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:56,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:37:56,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:37:57,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:37:57,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607825473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:37:57,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:37:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-23 22:37:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362499022] [2023-11-23 22:37:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:37:57,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:37:57,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:37:57,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:37:57,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-23 22:37:57,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:57,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:57,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-23 22:37:57,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:57,735 INFO L124 PetriNetUnfolderBase]: 3428/5068 cut-off events. [2023-11-23 22:37:57,736 INFO L125 PetriNetUnfolderBase]: For 4097/4638 co-relation queries the response was YES. [2023-11-23 22:37:57,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13002 conditions, 5068 events. 3428/5068 cut-off events. For 4097/4638 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27590 event pairs, 1074 based on Foata normal form. 171/4843 useless extension candidates. Maximal degree in co-relation 7734. Up to 2223 conditions per place. [2023-11-23 22:37:57,775 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 77 selfloop transitions, 11 changer transitions 6/108 dead transitions. [2023-11-23 22:37:57,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 626 flow [2023-11-23 22:37:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:37:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:37:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2023-11-23 22:37:57,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2023-11-23 22:37:57,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 159 transitions. [2023-11-23 22:37:57,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 159 transitions. [2023-11-23 22:37:57,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:57,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 159 transitions. [2023-11-23 22:37:57,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 26.5) internal successors, (159), 6 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:57,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:57,780 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:57,780 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 252 flow. Second operand 6 states and 159 transitions. [2023-11-23 22:37:57,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 626 flow [2023-11-23 22:37:57,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 561 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-23 22:37:57,787 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 251 flow [2023-11-23 22:37:57,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-23 22:37:57,788 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 23 predicate places. [2023-11-23 22:37:57,788 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 251 flow [2023-11-23 22:37:57,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:57,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:57,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:57,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:58,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:58,010 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:58,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash -211690682, now seen corresponding path program 1 times [2023-11-23 22:37:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466668484] [2023-11-23 22:37:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:37:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466668484] [2023-11-23 22:37:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466668484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814709989] [2023-11-23 22:37:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:58,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:58,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:58,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:37:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:58,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:37:58,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:37:58,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:37:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814709989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:58,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-23 22:37:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165734567] [2023-11-23 22:37:58,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:58,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 22:37:58,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:58,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 22:37:58,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:37:58,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:37:58,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 251 flow. Second operand has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:58,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:58,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:37:58,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:37:59,350 INFO L124 PetriNetUnfolderBase]: 2571/4238 cut-off events. [2023-11-23 22:37:59,351 INFO L125 PetriNetUnfolderBase]: For 3403/3617 co-relation queries the response was YES. [2023-11-23 22:37:59,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11311 conditions, 4238 events. 2571/4238 cut-off events. For 3403/3617 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 24859 event pairs, 1834 based on Foata normal form. 85/4220 useless extension candidates. Maximal degree in co-relation 7213. Up to 2919 conditions per place. [2023-11-23 22:37:59,385 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 31 selfloop transitions, 12 changer transitions 37/95 dead transitions. [2023-11-23 22:37:59,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 95 transitions, 520 flow [2023-11-23 22:37:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:37:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-23 22:37:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2023-11-23 22:37:59,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2023-11-23 22:37:59,387 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 206 transitions. [2023-11-23 22:37:59,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 206 transitions. [2023-11-23 22:37:59,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:37:59,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 206 transitions. [2023-11-23 22:37:59,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:59,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:59,390 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:59,390 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 251 flow. Second operand 8 states and 206 transitions. [2023-11-23 22:37:59,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 95 transitions, 520 flow [2023-11-23 22:37:59,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 509 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:37:59,401 INFO L231 Difference]: Finished difference. Result has 77 places, 58 transitions, 243 flow [2023-11-23 22:37:59,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=243, PETRI_PLACES=77, PETRI_TRANSITIONS=58} [2023-11-23 22:37:59,402 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-11-23 22:37:59,402 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 58 transitions, 243 flow [2023-11-23 22:37:59,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.6875) internal successors, (315), 16 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:59,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:37:59,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 22:37:59,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:37:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:59,619 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:37:59,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:37:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1012453380, now seen corresponding path program 1 times [2023-11-23 22:37:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:37:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115423809] [2023-11-23 22:37:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:37:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:37:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:37:59,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115423809] [2023-11-23 22:37:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115423809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:37:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832237637] [2023-11-23 22:37:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:37:59,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:37:59,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:37:59,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:37:59,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:37:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:37:59,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:37:59,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:37:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:37:59,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:37:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:37:59,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832237637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:37:59,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:37:59,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 22:37:59,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67421546] [2023-11-23 22:37:59,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:37:59,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:37:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:37:59,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:37:59,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:37:59,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-23 22:37:59,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 58 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:37:59,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:37:59,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-23 22:37:59,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:01,046 INFO L124 PetriNetUnfolderBase]: 4277/6787 cut-off events. [2023-11-23 22:38:01,046 INFO L125 PetriNetUnfolderBase]: For 6331/7506 co-relation queries the response was YES. [2023-11-23 22:38:01,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18402 conditions, 6787 events. 4277/6787 cut-off events. For 6331/7506 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 38617 event pairs, 913 based on Foata normal form. 553/7317 useless extension candidates. Maximal degree in co-relation 18326. Up to 2477 conditions per place. [2023-11-23 22:38:01,103 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 173 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2023-11-23 22:38:01,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 199 transitions, 1153 flow [2023-11-23 22:38:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:38:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:38:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 329 transitions. [2023-11-23 22:38:01,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2023-11-23 22:38:01,105 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 329 transitions. [2023-11-23 22:38:01,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 329 transitions. [2023-11-23 22:38:01,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:01,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 329 transitions. [2023-11-23 22:38:01,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 32.9) internal successors, (329), 10 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:01,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:01,110 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:01,110 INFO L175 Difference]: Start difference. First operand has 77 places, 58 transitions, 243 flow. Second operand 10 states and 329 transitions. [2023-11-23 22:38:01,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 199 transitions, 1153 flow [2023-11-23 22:38:01,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 199 transitions, 1074 flow, removed 20 selfloop flow, removed 9 redundant places. [2023-11-23 22:38:01,129 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 282 flow [2023-11-23 22:38:01,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-11-23 22:38:01,132 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-11-23 22:38:01,132 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 282 flow [2023-11-23 22:38:01,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.916666666666668) internal successors, (239), 12 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:01,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:01,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:38:01,354 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:38:01,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash -668831819, now seen corresponding path program 2 times [2023-11-23 22:38:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:01,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534731231] [2023-11-23 22:38:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:38:01,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:01,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534731231] [2023-11-23 22:38:01,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534731231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:01,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284949373] [2023-11-23 22:38:01,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:38:01,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:01,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:01,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:01,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:38:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:38:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:01,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:38:01,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:38:01,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:38:01,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284949373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:38:01,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:38:01,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-23 22:38:01,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359858873] [2023-11-23 22:38:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:38:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:38:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:38:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:38:01,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-23 22:38:01,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:01,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:01,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-23 22:38:01,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:02,566 INFO L124 PetriNetUnfolderBase]: 5244/7753 cut-off events. [2023-11-23 22:38:02,566 INFO L125 PetriNetUnfolderBase]: For 9634/10147 co-relation queries the response was YES. [2023-11-23 22:38:02,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22513 conditions, 7753 events. 5244/7753 cut-off events. For 9634/10147 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 43331 event pairs, 599 based on Foata normal form. 176/7725 useless extension candidates. Maximal degree in co-relation 18360. Up to 3145 conditions per place. [2023-11-23 22:38:02,638 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 89 selfloop transitions, 7 changer transitions 0/110 dead transitions. [2023-11-23 22:38:02,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 690 flow [2023-11-23 22:38:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:38:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:38:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2023-11-23 22:38:02,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2023-11-23 22:38:02,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 122 transitions. [2023-11-23 22:38:02,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 122 transitions. [2023-11-23 22:38:02,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:02,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 122 transitions. [2023-11-23 22:38:02,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:02,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:02,642 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:02,643 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 282 flow. Second operand 4 states and 122 transitions. [2023-11-23 22:38:02,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 690 flow [2023-11-23 22:38:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 110 transitions, 661 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-23 22:38:02,669 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 281 flow [2023-11-23 22:38:02,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2023-11-23 22:38:02,670 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-11-23 22:38:02,670 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 281 flow [2023-11-23 22:38:02,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:02,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:02,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:02,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:02,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:02,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:38:02,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 741050610, now seen corresponding path program 1 times [2023-11-23 22:38:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:02,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829895545] [2023-11-23 22:38:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:38:02,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:02,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829895545] [2023-11-23 22:38:02,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829895545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:02,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139811196] [2023-11-23 22:38:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:02,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:02,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:02,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:03,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:38:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:03,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:38:03,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:03,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139811196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:38:03,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:38:03,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 24 [2023-11-23 22:38:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480261613] [2023-11-23 22:38:03,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:38:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 22:38:03,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:38:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:38:03,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:38:03,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 281 flow. Second operand has 24 states, 24 states have (on average 17.041666666666668) internal successors, (409), 24 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:03,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:03,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:38:03,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:06,506 INFO L124 PetriNetUnfolderBase]: 10790/15996 cut-off events. [2023-11-23 22:38:06,506 INFO L125 PetriNetUnfolderBase]: For 21152/22230 co-relation queries the response was YES. [2023-11-23 22:38:06,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48056 conditions, 15996 events. 10790/15996 cut-off events. For 21152/22230 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 99737 event pairs, 3073 based on Foata normal form. 352/16206 useless extension candidates. Maximal degree in co-relation 39372. Up to 4470 conditions per place. [2023-11-23 22:38:06,790 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 235 selfloop transitions, 25 changer transitions 7/281 dead transitions. [2023-11-23 22:38:06,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 281 transitions, 1794 flow [2023-11-23 22:38:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 22:38:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-23 22:38:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 428 transitions. [2023-11-23 22:38:06,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138055222088835 [2023-11-23 22:38:06,795 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 428 transitions. [2023-11-23 22:38:06,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 428 transitions. [2023-11-23 22:38:06,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:06,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 428 transitions. [2023-11-23 22:38:06,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 25.176470588235293) internal successors, (428), 17 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:06,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:06,800 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 49.0) internal successors, (882), 18 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:06,800 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 281 flow. Second operand 17 states and 428 transitions. [2023-11-23 22:38:06,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 281 transitions, 1794 flow [2023-11-23 22:38:06,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 281 transitions, 1764 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:38:06,904 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 368 flow [2023-11-23 22:38:06,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=368, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2023-11-23 22:38:06,906 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2023-11-23 22:38:06,906 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 368 flow [2023-11-23 22:38:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 17.041666666666668) internal successors, (409), 24 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:06,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:06,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:06,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:07,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:38:07,123 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:38:07,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1482468706, now seen corresponding path program 2 times [2023-11-23 22:38:07,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:07,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645914562] [2023-11-23 22:38:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:07,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:38:07,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:07,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645914562] [2023-11-23 22:38:07,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645914562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:07,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037214590] [2023-11-23 22:38:07,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:38:07,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:07,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:07,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:38:07,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:38:07,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:07,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:38:07,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 22:38:07,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 22:38:07,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037214590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:38:07,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:38:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 3, 3] total 17 [2023-11-23 22:38:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193570501] [2023-11-23 22:38:07,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:38:07,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 22:38:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 22:38:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:38:07,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:38:07,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 368 flow. Second operand has 18 states, 18 states have (on average 17.22222222222222) internal successors, (310), 18 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:07,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:07,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:38:07,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:11,643 INFO L124 PetriNetUnfolderBase]: 16675/24966 cut-off events. [2023-11-23 22:38:11,644 INFO L125 PetriNetUnfolderBase]: For 34245/36318 co-relation queries the response was YES. [2023-11-23 22:38:11,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76064 conditions, 24966 events. 16675/24966 cut-off events. For 34245/36318 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 165812 event pairs, 3417 based on Foata normal form. 629/25484 useless extension candidates. Maximal degree in co-relation 62561. Up to 4613 conditions per place. [2023-11-23 22:38:11,845 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 188 selfloop transitions, 32 changer transitions 31/265 dead transitions. [2023-11-23 22:38:11,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 265 transitions, 1751 flow [2023-11-23 22:38:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:38:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-23 22:38:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 429 transitions. [2023-11-23 22:38:11,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2023-11-23 22:38:11,849 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 429 transitions. [2023-11-23 22:38:11,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 429 transitions. [2023-11-23 22:38:11,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:11,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 429 transitions. [2023-11-23 22:38:11,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 23.833333333333332) internal successors, (429), 18 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:11,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:11,855 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:11,855 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 368 flow. Second operand 18 states and 429 transitions. [2023-11-23 22:38:11,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 265 transitions, 1751 flow [2023-11-23 22:38:12,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 265 transitions, 1705 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-11-23 22:38:12,101 INFO L231 Difference]: Finished difference. Result has 102 places, 82 transitions, 461 flow [2023-11-23 22:38:12,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=461, PETRI_PLACES=102, PETRI_TRANSITIONS=82} [2023-11-23 22:38:12,103 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2023-11-23 22:38:12,103 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 82 transitions, 461 flow [2023-11-23 22:38:12,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.22222222222222) internal successors, (310), 18 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:12,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:38:12,104 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-23 22:38:12,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:12,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:38:12,319 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 14 more)] === [2023-11-23 22:38:12,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:38:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1225900054, now seen corresponding path program 2 times [2023-11-23 22:38:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:38:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243218418] [2023-11-23 22:38:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:38:12,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:38:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:38:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 22:38:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:38:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243218418] [2023-11-23 22:38:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243218418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:38:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17367601] [2023-11-23 22:38:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:38:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:38:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:38:12,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:38:12,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:38:12,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:38:12,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:38:12,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:38:12,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:38:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 22:38:12,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:38:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 22:38:12,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17367601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:38:12,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:38:12,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 11 [2023-11-23 22:38:12,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752433122] [2023-11-23 22:38:12,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:38:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:38:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:38:12,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:38:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:38:12,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-23 22:38:12,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 82 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:38:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-23 22:38:12,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:38:16,178 INFO L124 PetriNetUnfolderBase]: 16885/25719 cut-off events. [2023-11-23 22:38:16,178 INFO L125 PetriNetUnfolderBase]: For 54105/55735 co-relation queries the response was YES. [2023-11-23 22:38:16,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82154 conditions, 25719 events. 16885/25719 cut-off events. For 54105/55735 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 174585 event pairs, 3268 based on Foata normal form. 674/26194 useless extension candidates. Maximal degree in co-relation 63610. Up to 6453 conditions per place. [2023-11-23 22:38:16,269 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 0 selfloop transitions, 0 changer transitions 271/271 dead transitions. [2023-11-23 22:38:16,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 271 transitions, 1993 flow [2023-11-23 22:38:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:38:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-23 22:38:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 397 transitions. [2023-11-23 22:38:16,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063775510204082 [2023-11-23 22:38:16,271 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 397 transitions. [2023-11-23 22:38:16,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 397 transitions. [2023-11-23 22:38:16,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:38:16,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 397 transitions. [2023-11-23 22:38:16,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 24.8125) internal successors, (397), 16 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:16,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:16,276 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 49.0) internal successors, (833), 17 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:16,276 INFO L175 Difference]: Start difference. First operand has 102 places, 82 transitions, 461 flow. Second operand 16 states and 397 transitions. [2023-11-23 22:38:16,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 271 transitions, 1993 flow [2023-11-23 22:38:16,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 271 transitions, 1930 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-11-23 22:38:16,734 INFO L231 Difference]: Finished difference. Result has 104 places, 0 transitions, 0 flow [2023-11-23 22:38:16,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=104, PETRI_TRANSITIONS=0} [2023-11-23 22:38:16,735 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2023-11-23 22:38:16,735 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 0 transitions, 0 flow [2023-11-23 22:38:16,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:38:16,738 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 17 remaining) [2023-11-23 22:38:16,738 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 17 remaining) [2023-11-23 22:38:16,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 17 remaining) [2023-11-23 22:38:16,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 17 remaining) [2023-11-23 22:38:16,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 17 remaining) [2023-11-23 22:38:16,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 17 remaining) [2023-11-23 22:38:16,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 17 remaining) [2023-11-23 22:38:16,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 17 remaining) [2023-11-23 22:38:16,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 17 remaining) [2023-11-23 22:38:16,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2023-11-23 22:38:16,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2023-11-23 22:38:16,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 17 remaining) [2023-11-23 22:38:16,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 17 remaining) [2023-11-23 22:38:16,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 17 remaining) [2023-11-23 22:38:16,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 17 remaining) [2023-11-23 22:38:16,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 17 remaining) [2023-11-23 22:38:16,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 17 remaining) [2023-11-23 22:38:16,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:38:16,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:38:16,962 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:38:16,968 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-23 22:38:16,969 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 22:38:16,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:38:16 BasicIcfg [2023-11-23 22:38:16,975 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 22:38:16,975 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 22:38:16,975 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 22:38:16,975 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 22:38:16,977 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:37:48" (3/4) ... [2023-11-23 22:38:16,979 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 22:38:16,983 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-23 22:38:16,983 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-23 22:38:16,983 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2023-11-23 22:38:16,999 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 97 nodes and edges [2023-11-23 22:38:16,999 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2023-11-23 22:38:17,000 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-23 22:38:17,000 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 22:38:17,116 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/witness.graphml [2023-11-23 22:38:17,116 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/witness.yml [2023-11-23 22:38:17,117 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 22:38:17,117 INFO L158 Benchmark]: Toolchain (without parser) took 29891.81ms. Allocated memory was 155.2MB in the beginning and 4.3GB in the end (delta: 4.2GB). Free memory was 112.4MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 529.5MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,117 INFO L158 Benchmark]: CDTParser took 1.19ms. Allocated memory is still 155.2MB. Free memory is still 121.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 22:38:17,118 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.13ms. Allocated memory is still 155.2MB. Free memory was 112.4MB in the beginning and 100.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,118 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.38ms. Allocated memory is still 155.2MB. Free memory was 100.9MB in the beginning and 98.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,119 INFO L158 Benchmark]: Boogie Preprocessor took 59.48ms. Allocated memory is still 155.2MB. Free memory was 98.8MB in the beginning and 96.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,119 INFO L158 Benchmark]: RCFGBuilder took 908.73ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 51.6MB in the end (delta: 44.6MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,120 INFO L158 Benchmark]: TraceAbstraction took 28421.85ms. Allocated memory was 155.2MB in the beginning and 4.3GB in the end (delta: 4.2GB). Free memory was 51.0MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 720.3MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,120 INFO L158 Benchmark]: Witness Printer took 141.54ms. Allocated memory is still 4.3GB. Free memory was 3.8GB in the beginning and 3.8GB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 22:38:17,123 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19ms. Allocated memory is still 155.2MB. Free memory is still 121.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 304.13ms. Allocated memory is still 155.2MB. Free memory was 112.4MB in the beginning and 100.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.38ms. Allocated memory is still 155.2MB. Free memory was 100.9MB in the beginning and 98.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.48ms. Allocated memory is still 155.2MB. Free memory was 98.8MB in the beginning and 96.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 908.73ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 51.6MB in the end (delta: 44.6MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. * TraceAbstraction took 28421.85ms. Allocated memory was 155.2MB in the beginning and 4.3GB in the end (delta: 4.2GB). Free memory was 51.0MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 720.3MB. Max. memory is 16.1GB. * Witness Printer took 141.54ms. Allocated memory is still 4.3GB. Free memory was 3.8GB in the beginning and 3.8GB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 46]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 70]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 70]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 110]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 110]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 76 locations, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28.2s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 19.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1863 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1758 mSDsluCounter, 1408 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1375 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6746 IncrementalHoareTripleChecker+Invalid, 6798 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 33 mSDtfsCounter, 6746 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 512 GetRequests, 289 SyntacticMatches, 7 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=461occurred in iteration=15, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 462 NumberOfCodeBlocks, 405 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 591 ConstructedInterpolants, 0 QuantifiedInterpolants, 1927 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1517 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 272/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 22:38:17,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ca08c9a-ac7e-4312-bd22-f56090593aa9/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE