./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme --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 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:03:48,645 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:03:48,755 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 12:03:48,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:03:48,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:03:48,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:03:48,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:03:48,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:03:48,792 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:03:48,793 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:03:48,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:03:48,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:03:48,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:03:48,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:03:48,797 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:03:48,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:03:48,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:03:48,799 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:03:48,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:03:48,800 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:03:48,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:03:48,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:03:48,803 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:03:48,803 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:03:48,804 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 12:03:48,805 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 12:03:48,805 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:03:48,806 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:03:48,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:03:48,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:03:48,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:03:48,808 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:03:48,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:03:48,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:48,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:03:48,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:03:48,811 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:03:48,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:03:48,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:03:48,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:03:48,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:03:48,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:03:48,814 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:03:48,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:03:48,815 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_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103efe8931e099ca6c2446ad32c4c46818a6d213fc850bc42032bda38d601e6f [2023-11-26 12:03:49,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:03:49,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:03:49,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:03:49,188 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:03:49,189 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:03:49,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-26 12:03:52,489 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:03:52,736 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:03:52,737 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2023-11-26 12:03:52,746 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/data/88e57f271/aec9c5b279b4451aa1b315a7ef00b74b/FLAG016fae3d2 [2023-11-26 12:03:52,761 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/data/88e57f271/aec9c5b279b4451aa1b315a7ef00b74b [2023-11-26 12:03:52,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:03:52,766 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:03:52,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:52,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:03:52,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:03:52,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:52" (1/1) ... [2023-11-26 12:03:52,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7572a910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:52, skipping insertion in model container [2023-11-26 12:03:52,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:03:52" (1/1) ... [2023-11-26 12:03:52,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:03:53,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:53,074 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:03:53,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:03:53,108 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:53,109 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 12:03:53,116 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:03:53,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53 WrapperNode [2023-11-26 12:03:53,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:03:53,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:53,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:03:53,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:03:53,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,162 INFO L138 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2023-11-26 12:03:53,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:03:53,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:03:53,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:03:53,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:03:53,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,180 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,201 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 12:03:53,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,224 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:03:53,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:03:53,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:03:53,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:03:53,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (1/1) ... [2023-11-26 12:03:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:03:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:03:53,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:03:53,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:03:53,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:03:53,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 12:03:53,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 12:03:53,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 12:03:53,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 12:03:53,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 12:03:53,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 12:03:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:03:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:03:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:03:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 12:03:53,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:03:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 12:03:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 12:03:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 12:03:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 12:03:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 12:03:53,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 12:03:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:03:53,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:03:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 12:03:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 12:03:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 12:03:53,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 12:03:53,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:03:53,322 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 12:03:53,443 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:03:53,445 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:03:53,768 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:03:54,089 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:03:54,090 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 12:03:54,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:54 BoogieIcfgContainer [2023-11-26 12:03:54,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:03:54,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:03:54,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:03:54,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:03:54,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:03:52" (1/3) ... [2023-11-26 12:03:54,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8d4d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:54, skipping insertion in model container [2023-11-26 12:03:54,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:03:53" (2/3) ... [2023-11-26 12:03:54,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8d4d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:03:54, skipping insertion in model container [2023-11-26 12:03:54,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:03:54" (3/3) ... [2023-11-26 12:03:54,101 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-11-26 12:03:54,110 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 12:03:54,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:03:54,122 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-26 12:03:54,122 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 12:03:54,198 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 12:03:54,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 53 transitions, 127 flow [2023-11-26 12:03:54,303 INFO L124 PetriNetUnfolderBase]: 4/50 cut-off events. [2023-11-26 12:03:54,303 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 12:03:54,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 4/50 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 182 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-11-26 12:03:54,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 53 transitions, 127 flow [2023-11-26 12:03:54,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 104 flow [2023-11-26 12:03:54,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:03:54,341 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;@4af5976f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:03:54,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-11-26 12:03:54,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 12:03:54,366 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-26 12:03:54,366 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 12:03:54,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:54,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:54,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:03:54,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash -582876261, now seen corresponding path program 1 times [2023-11-26 12:03:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:54,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052885923] [2023-11-26 12:03:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:54,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:54,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052885923] [2023-11-26 12:03:54,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052885923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:54,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:54,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:54,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810569365] [2023-11-26 12:03:54,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:54,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:54,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:54,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:03:54,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:54,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:54,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:03:54,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:55,761 INFO L124 PetriNetUnfolderBase]: 4035/6022 cut-off events. [2023-11-26 12:03:55,762 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-11-26 12:03:55,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12455 conditions, 6022 events. 4035/6022 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36655 event pairs, 1317 based on Foata normal form. 0/3368 useless extension candidates. Maximal degree in co-relation 11894. Up to 3341 conditions per place. [2023-11-26 12:03:55,827 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 57 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2023-11-26 12:03:55,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 74 transitions, 301 flow [2023-11-26 12:03:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-26 12:03:55,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6729559748427673 [2023-11-26 12:03:55,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-26 12:03:55,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-26 12:03:55,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:55,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-26 12:03:55,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:55,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:55,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:55,852 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 104 flow. Second operand 3 states and 107 transitions. [2023-11-26 12:03:55,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 74 transitions, 301 flow [2023-11-26 12:03:55,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 74 transitions, 291 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 12:03:55,868 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 170 flow [2023-11-26 12:03:55,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-11-26 12:03:55,875 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-11-26 12:03:55,876 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 170 flow [2023-11-26 12:03:55,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:55,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:55,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:55,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:03:55,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:03:55,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash -582876260, now seen corresponding path program 1 times [2023-11-26 12:03:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:55,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067360946] [2023-11-26 12:03:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067360946] [2023-11-26 12:03:56,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067360946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:56,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:56,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44829668] [2023-11-26 12:03:56,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:56,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:03:56,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:56,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:56,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:03:56,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:57,228 INFO L124 PetriNetUnfolderBase]: 6039/8808 cut-off events. [2023-11-26 12:03:57,229 INFO L125 PetriNetUnfolderBase]: For 1506/1506 co-relation queries the response was YES. [2023-11-26 12:03:57,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20903 conditions, 8808 events. 6039/8808 cut-off events. For 1506/1506 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 53244 event pairs, 1295 based on Foata normal form. 360/6166 useless extension candidates. Maximal degree in co-relation 17652. Up to 5835 conditions per place. [2023-11-26 12:03:57,364 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 67 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2023-11-26 12:03:57,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 431 flow [2023-11-26 12:03:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-26 12:03:57,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477987421383647 [2023-11-26 12:03:57,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-26 12:03:57,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-26 12:03:57,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:57,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-26 12:03:57,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 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) [2023-11-26 12:03:57,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,382 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 170 flow. Second operand 3 states and 103 transitions. [2023-11-26 12:03:57,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 431 flow [2023-11-26 12:03:57,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 86 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:03:57,436 INFO L231 Difference]: Finished difference. Result has 52 places, 62 transitions, 260 flow [2023-11-26 12:03:57,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=52, PETRI_TRANSITIONS=62} [2023-11-26 12:03:57,437 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-11-26 12:03:57,437 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 62 transitions, 260 flow [2023-11-26 12:03:57,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:57,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 12:03:57,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:03:57,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -582876259, now seen corresponding path program 1 times [2023-11-26 12:03:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054477057] [2023-11-26 12:03:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:57,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:57,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054477057] [2023-11-26 12:03:57,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054477057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:57,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029869268] [2023-11-26 12:03:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:57,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:57,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:57,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:03:57,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:57,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:57,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:03:57,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:58,531 INFO L124 PetriNetUnfolderBase]: 5641/8218 cut-off events. [2023-11-26 12:03:58,531 INFO L125 PetriNetUnfolderBase]: For 2326/2326 co-relation queries the response was YES. [2023-11-26 12:03:58,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21935 conditions, 8218 events. 5641/8218 cut-off events. For 2326/2326 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 49858 event pairs, 3445 based on Foata normal form. 0/5782 useless extension candidates. Maximal degree in co-relation 18932. Up to 7952 conditions per place. [2023-11-26 12:03:58,606 INFO L140 encePairwiseOnDemand]: 51/53 looper letters, 51 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-26 12:03:58,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 354 flow [2023-11-26 12:03:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:03:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:03:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-26 12:03:58,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2023-11-26 12:03:58,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-26 12:03:58,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-26 12:03:58,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:03:58,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-26 12:03:58,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,612 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,612 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 260 flow. Second operand 3 states and 69 transitions. [2023-11-26 12:03:58,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 354 flow [2023-11-26 12:03:58,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:03:58,647 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 232 flow [2023-11-26 12:03:58,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-11-26 12:03:58,648 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-26 12:03:58,649 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 232 flow [2023-11-26 12:03:58,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:03:58,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:03:58,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:03:58,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:03:58,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:03:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash -582876258, now seen corresponding path program 1 times [2023-11-26 12:03:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:03:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526713888] [2023-11-26 12:03:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:03:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:03:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:03:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:03:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:03:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526713888] [2023-11-26 12:03:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526713888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:03:58,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:03:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:03:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402968237] [2023-11-26 12:03:58,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:03:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:03:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:03:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:03:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:03:58,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:03:58,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:03:58,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:03:58,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:03:58,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:03:59,946 INFO L124 PetriNetUnfolderBase]: 6537/9802 cut-off events. [2023-11-26 12:03:59,946 INFO L125 PetriNetUnfolderBase]: For 2030/2030 co-relation queries the response was YES. [2023-11-26 12:03:59,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25353 conditions, 9802 events. 6537/9802 cut-off events. For 2030/2030 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 63301 event pairs, 2493 based on Foata normal form. 332/7096 useless extension candidates. Maximal degree in co-relation 25343. Up to 5455 conditions per place. [2023-11-26 12:04:00,021 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 89 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2023-11-26 12:04:00,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 100 transitions, 573 flow [2023-11-26 12:04:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2023-11-26 12:04:00,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352201257861635 [2023-11-26 12:04:00,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 101 transitions. [2023-11-26 12:04:00,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 101 transitions. [2023-11-26 12:04:00,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:00,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 101 transitions. [2023-11-26 12:04:00,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,025 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 232 flow. Second operand 3 states and 101 transitions. [2023-11-26 12:04:00,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 100 transitions, 573 flow [2023-11-26 12:04:00,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 100 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:00,030 INFO L231 Difference]: Finished difference. Result has 53 places, 62 transitions, 272 flow [2023-11-26 12:04:00,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=53, PETRI_TRANSITIONS=62} [2023-11-26 12:04:00,031 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-11-26 12:04:00,031 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 272 flow [2023-11-26 12:04:00,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:00,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:00,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:04:00,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:04:00,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1054407237, now seen corresponding path program 1 times [2023-11-26 12:04:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:00,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028243238] [2023-11-26 12:04:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:00,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:00,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:00,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028243238] [2023-11-26 12:04:00,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028243238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:00,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:00,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:04:00,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912159632] [2023-11-26 12:04:00,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:00,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:00,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:00,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:00,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:00,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:04:00,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:00,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:00,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:04:00,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:01,473 INFO L124 PetriNetUnfolderBase]: 7245/10988 cut-off events. [2023-11-26 12:04:01,474 INFO L125 PetriNetUnfolderBase]: For 3248/3248 co-relation queries the response was YES. [2023-11-26 12:04:01,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30139 conditions, 10988 events. 7245/10988 cut-off events. For 3248/3248 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 72447 event pairs, 2057 based on Foata normal form. 254/7873 useless extension candidates. Maximal degree in co-relation 30127. Up to 6963 conditions per place. [2023-11-26 12:04:01,587 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 89 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2023-11-26 12:04:01,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 102 transitions, 649 flow [2023-11-26 12:04:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2023-11-26 12:04:01,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2023-11-26 12:04:01,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2023-11-26 12:04:01,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2023-11-26 12:04:01,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:01,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2023-11-26 12:04:01,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,594 INFO L175 Difference]: Start difference. First operand has 53 places, 62 transitions, 272 flow. Second operand 3 states and 99 transitions. [2023-11-26 12:04:01,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 102 transitions, 649 flow [2023-11-26 12:04:01,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 102 transitions, 644 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:01,600 INFO L231 Difference]: Finished difference. Result has 56 places, 66 transitions, 333 flow [2023-11-26 12:04:01,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=56, PETRI_TRANSITIONS=66} [2023-11-26 12:04:01,704 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-11-26 12:04:01,705 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 66 transitions, 333 flow [2023-11-26 12:04:01,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:01,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:01,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 12:04:01,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:04:01,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1054407236, now seen corresponding path program 1 times [2023-11-26 12:04:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:01,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823167955] [2023-11-26 12:04:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:01,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:01,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823167955] [2023-11-26 12:04:01,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823167955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:04:01,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:04:01,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 12:04:01,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897902729] [2023-11-26 12:04:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:04:01,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:04:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:04:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:04:01,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:04:01,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 66 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:01,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:01,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:04:01,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:02,970 INFO L124 PetriNetUnfolderBase]: 6657/10170 cut-off events. [2023-11-26 12:04:02,970 INFO L125 PetriNetUnfolderBase]: For 5296/5296 co-relation queries the response was YES. [2023-11-26 12:04:03,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29212 conditions, 10170 events. 6657/10170 cut-off events. For 5296/5296 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 68283 event pairs, 5029 based on Foata normal form. 370/7631 useless extension candidates. Maximal degree in co-relation 29197. Up to 9858 conditions per place. [2023-11-26 12:04:03,061 INFO L140 encePairwiseOnDemand]: 51/53 looper letters, 53 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-26 12:04:03,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 413 flow [2023-11-26 12:04:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:04:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 12:04:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2023-11-26 12:04:03,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276729559748428 [2023-11-26 12:04:03,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 68 transitions. [2023-11-26 12:04:03,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 68 transitions. [2023-11-26 12:04:03,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:03,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 68 transitions. [2023-11-26 12:04:03,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,068 INFO L175 Difference]: Start difference. First operand has 56 places, 66 transitions, 333 flow. Second operand 3 states and 68 transitions. [2023-11-26 12:04:03,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 413 flow [2023-11-26 12:04:03,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 12:04:03,073 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 301 flow [2023-11-26 12:04:03,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-26 12:04:03,076 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-11-26 12:04:03,077 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 301 flow [2023-11-26 12:04:03,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:03,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 12:04:03,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:04:03,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1608605740, now seen corresponding path program 1 times [2023-11-26 12:04:03,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:03,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337524095] [2023-11-26 12:04:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:03,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:03,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337524095] [2023-11-26 12:04:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337524095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313368854] [2023-11-26 12:04:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:03,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:03,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:03,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:04:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:03,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:04:03,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:03,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:03,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313368854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:03,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:03,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-26 12:04:03,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033952376] [2023-11-26 12:04:03,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:03,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:04:03,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:04:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:04:03,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:04:03,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:03,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:03,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:04:03,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:06,913 INFO L124 PetriNetUnfolderBase]: 20193/30042 cut-off events. [2023-11-26 12:04:06,914 INFO L125 PetriNetUnfolderBase]: For 14670/14670 co-relation queries the response was YES. [2023-11-26 12:04:06,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84020 conditions, 30042 events. 20193/30042 cut-off events. For 14670/14670 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 210776 event pairs, 795 based on Foata normal form. 892/22584 useless extension candidates. Maximal degree in co-relation 84005. Up to 8583 conditions per place. [2023-11-26 12:04:07,158 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 139 selfloop transitions, 65 changer transitions 0/212 dead transitions. [2023-11-26 12:04:07,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 212 transitions, 1330 flow [2023-11-26 12:04:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:04:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 12:04:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 257 transitions. [2023-11-26 12:04:07,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.692722371967655 [2023-11-26 12:04:07,162 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 257 transitions. [2023-11-26 12:04:07,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 257 transitions. [2023-11-26 12:04:07,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:07,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 257 transitions. [2023-11-26 12:04:07,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:07,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:07,167 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 53.0) internal successors, (424), 8 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:07,167 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 301 flow. Second operand 7 states and 257 transitions. [2023-11-26 12:04:07,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 212 transitions, 1330 flow [2023-11-26 12:04:07,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 212 transitions, 1329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 12:04:07,179 INFO L231 Difference]: Finished difference. Result has 64 places, 120 transitions, 1018 flow [2023-11-26 12:04:07,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1018, PETRI_PLACES=64, PETRI_TRANSITIONS=120} [2023-11-26 12:04:07,180 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-11-26 12:04:07,181 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 120 transitions, 1018 flow [2023-11-26 12:04:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:07,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:07,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:07,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:07,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 12:04:07,394 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:04:07,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1608605738, now seen corresponding path program 1 times [2023-11-26 12:04:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365061845] [2023-11-26 12:04:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:07,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:07,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365061845] [2023-11-26 12:04:07,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365061845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:07,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096799193] [2023-11-26 12:04:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:07,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:07,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:07,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:04:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:07,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:04:07,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:07,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096799193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:07,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:07,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-26 12:04:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808901160] [2023-11-26 12:04:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:04:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:04:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:04:07,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:04:07,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 120 transitions, 1018 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:07,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:07,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:04:07,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:15,415 INFO L124 PetriNetUnfolderBase]: 41757/62928 cut-off events. [2023-11-26 12:04:15,425 INFO L125 PetriNetUnfolderBase]: For 137768/137768 co-relation queries the response was YES. [2023-11-26 12:04:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219031 conditions, 62928 events. 41757/62928 cut-off events. For 137768/137768 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 479609 event pairs, 9001 based on Foata normal form. 634/49204 useless extension candidates. Maximal degree in co-relation 219011. Up to 14718 conditions per place. [2023-11-26 12:04:16,221 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 377 selfloop transitions, 43 changer transitions 0/428 dead transitions. [2023-11-26 12:04:16,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 428 transitions, 4507 flow [2023-11-26 12:04:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:04:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 12:04:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2023-11-26 12:04:16,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7169811320754716 [2023-11-26 12:04:16,224 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 228 transitions. [2023-11-26 12:04:16,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 228 transitions. [2023-11-26 12:04:16,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:16,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 228 transitions. [2023-11-26 12:04:16,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:16,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:16,228 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:16,228 INFO L175 Difference]: Start difference. First operand has 64 places, 120 transitions, 1018 flow. Second operand 6 states and 228 transitions. [2023-11-26 12:04:16,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 428 transitions, 4507 flow [2023-11-26 12:04:17,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 428 transitions, 4399 flow, removed 54 selfloop flow, removed 0 redundant places. [2023-11-26 12:04:17,882 INFO L231 Difference]: Finished difference. Result has 73 places, 152 transitions, 1565 flow [2023-11-26 12:04:17,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1565, PETRI_PLACES=73, PETRI_TRANSITIONS=152} [2023-11-26 12:04:17,883 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2023-11-26 12:04:17,884 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 152 transitions, 1565 flow [2023-11-26 12:04:17,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:17,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 12:04:17,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:04:17,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:04:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:18,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2023-11-26 12:04:18,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:04:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash -628889795, now seen corresponding path program 1 times [2023-11-26 12:04:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:04:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609794591] [2023-11-26 12:04:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:18,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:04:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:18,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:04:18,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609794591] [2023-11-26 12:04:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609794591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:04:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782763625] [2023-11-26 12:04:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:04:18,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:04:18,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:04:18,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:04:18,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4b4643-0b09-4a41-96b6-fc2ea722df97/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:04:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:04:18,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:04:18,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:04:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:18,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:04:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:04:18,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782763625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:04:18,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:04:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-26 12:04:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048388807] [2023-11-26 12:04:18,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:04:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:04:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:04:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:04:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:04:18,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2023-11-26 12:04:18,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 152 transitions, 1565 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:18,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 12:04:18,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2023-11-26 12:04:18,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 12:04:37,999 INFO L124 PetriNetUnfolderBase]: 99045/149466 cut-off events. [2023-11-26 12:04:37,999 INFO L125 PetriNetUnfolderBase]: For 542166/542166 co-relation queries the response was YES. [2023-11-26 12:04:38,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551449 conditions, 149466 events. 99045/149466 cut-off events. For 542166/542166 co-relation queries the response was YES. Maximal size of possible extension queue 4647. Compared 1264016 event pairs, 6431 based on Foata normal form. 1908/123080 useless extension candidates. Maximal degree in co-relation 551423. Up to 36799 conditions per place. [2023-11-26 12:04:39,413 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 498 selfloop transitions, 175 changer transitions 0/681 dead transitions. [2023-11-26 12:04:39,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 681 transitions, 8183 flow [2023-11-26 12:04:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 12:04:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 12:04:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2023-11-26 12:04:39,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.690566037735849 [2023-11-26 12:04:39,416 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 366 transitions. [2023-11-26 12:04:39,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 366 transitions. [2023-11-26 12:04:39,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 12:04:39,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 366 transitions. [2023-11-26 12:04:39,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,421 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 53.0) internal successors, (583), 11 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 12:04:39,421 INFO L175 Difference]: Start difference. First operand has 73 places, 152 transitions, 1565 flow. Second operand 10 states and 366 transitions. [2023-11-26 12:04:39,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 681 transitions, 8183 flow