./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:13:41,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:13:41,834 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-12 02:13:41,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:13:41,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:13:41,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:13:41,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:13:41,877 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:13:41,878 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:13:41,884 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:13:41,885 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:13:41,886 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:13:41,886 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:13:41,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:13:41,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:13:41,889 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:13:41,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:13:41,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:13:41,891 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:13:41,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:13:41,892 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:13:41,893 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:13:41,894 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 02:13:41,895 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:13:41,896 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:13:41,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:13:41,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:13:41,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:13:41,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:13:41,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:13:41,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:41,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:13:41,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:13:41,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:13:41,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:13:41,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:13:41,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:13:41,903 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:13:41,903 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:13:41,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:13:41,904 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:13:41,904 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_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2023-11-12 02:13:42,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:13:42,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:13:42,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:13:42,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:13:42,264 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:13:42,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-12 02:13:45,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:13:45,664 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:13:45,664 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2023-11-12 02:13:45,673 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/data/a4b831116/75182ba53063452f84eb06927ed869bb/FLAG41864c78f [2023-11-12 02:13:45,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/data/a4b831116/75182ba53063452f84eb06927ed869bb [2023-11-12 02:13:45,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:13:45,691 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:13:45,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:45,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:13:45,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:13:45,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:45" (1/1) ... [2023-11-12 02:13:45,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be7554a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:45, skipping insertion in model container [2023-11-12 02:13:45,700 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:45" (1/1) ... [2023-11-12 02:13:45,738 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:13:45,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:45,983 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:13:46,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:46,017 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:13:46,017 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:13:46,026 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:13:46,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46 WrapperNode [2023-11-12 02:13:46,027 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:46,028 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:46,028 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:13:46,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:13:46,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,086 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 228 [2023-11-12 02:13:46,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:46,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:13:46,087 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:13:46,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:13:46,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,101 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:13:46,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:13:46,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:13:46,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:13:46,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (1/1) ... [2023-11-12 02:13:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:46,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:46,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:13:46,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:13:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:13:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:13:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:13:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:13:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:13:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:13:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:13:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:13:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:13:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:13:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:13:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:13:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:13:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:13:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:13:46,214 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:13:46,324 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:13:46,325 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:13:46,858 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:13:47,054 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:13:47,054 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:13:47,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:47 BoogieIcfgContainer [2023-11-12 02:13:47,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:13:47,066 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:13:47,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:13:47,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:13:47,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:13:45" (1/3) ... [2023-11-12 02:13:47,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eaf75ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:47, skipping insertion in model container [2023-11-12 02:13:47,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:46" (2/3) ... [2023-11-12 02:13:47,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eaf75ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:47, skipping insertion in model container [2023-11-12 02:13:47,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:47" (3/3) ... [2023-11-12 02:13:47,076 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-11-12 02:13:47,087 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:13:47,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:13:47,099 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-12 02:13:47,099 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:13:47,200 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:13:47,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 211 transitions, 436 flow [2023-11-12 02:13:47,344 INFO L124 PetriNetUnfolderBase]: 13/209 cut-off events. [2023-11-12 02:13:47,345 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:13:47,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 209 events. 13/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 168 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-11-12 02:13:47,351 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 211 transitions, 436 flow [2023-11-12 02:13:47,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 187 transitions, 383 flow [2023-11-12 02:13:47,363 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:13:47,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 187 transitions, 383 flow [2023-11-12 02:13:47,378 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 187 transitions, 383 flow [2023-11-12 02:13:47,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 187 transitions, 383 flow [2023-11-12 02:13:47,477 INFO L124 PetriNetUnfolderBase]: 12/187 cut-off events. [2023-11-12 02:13:47,481 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:13:47,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 187 events. 12/187 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 165 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-11-12 02:13:47,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 1292 [2023-11-12 02:13:56,094 INFO L134 LiptonReduction]: Checked pairs total: 3605 [2023-11-12 02:13:56,095 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-11-12 02:13:56,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:13:56,123 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;@73eeeb5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:13:56,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-12 02:13:56,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:13:56,125 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-12 02:13:56,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:13:56,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:56,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-12 02:13:56,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:13:56,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:56,131 INFO L85 PathProgramCache]: Analyzing trace with hash 29692, now seen corresponding path program 1 times [2023-11-12 02:13:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:56,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645096530] [2023-11-12 02:13:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:56,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:56,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645096530] [2023-11-12 02:13:56,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645096530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:56,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:56,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:13:56,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986914449] [2023-11-12 02:13:56,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:56,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:56,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:13:56,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:13:56,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:56,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:56,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:13:56,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:56,781 INFO L124 PetriNetUnfolderBase]: 279/448 cut-off events. [2023-11-12 02:13:56,782 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-12 02:13:56,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 448 events. 279/448 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 1869 event pairs, 177 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 807. Up to 441 conditions per place. [2023-11-12 02:13:56,793 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 28 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-12 02:13:56,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 145 flow [2023-11-12 02:13:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-11-12 02:13:56,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46469622331691296 [2023-11-12 02:13:56,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-11-12 02:13:56,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-11-12 02:13:56,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:56,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-11-12 02:13:56,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:56,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:56,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:56,846 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 79 flow. Second operand 3 states and 566 transitions. [2023-11-12 02:13:56,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 145 flow [2023-11-12 02:13:56,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-12 02:13:56,855 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 110 flow [2023-11-12 02:13:56,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-12 02:13:56,862 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-12 02:13:56,862 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 110 flow [2023-11-12 02:13:56,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:56,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:56,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:13:56,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:13:56,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:13:56,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 921841, now seen corresponding path program 1 times [2023-11-12 02:13:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:56,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509074769] [2023-11-12 02:13:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:56,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:57,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:57,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509074769] [2023-11-12 02:13:57,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509074769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:57,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543171401] [2023-11-12 02:13:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:57,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:57,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:57,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:57,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:13:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:57,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:57,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:57,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:57,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543171401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:57,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:57,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-12 02:13:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756505557] [2023-11-12 02:13:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:57,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:57,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:13:57,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:13:57,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:57,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:57,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:13:57,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:57,408 INFO L124 PetriNetUnfolderBase]: 279/446 cut-off events. [2023-11-12 02:13:57,408 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:13:57,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 446 events. 279/446 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 1844 event pairs, 177 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 882. Up to 433 conditions per place. [2023-11-12 02:13:57,414 INFO L140 encePairwiseOnDemand]: 399/406 looper letters, 25 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-11-12 02:13:57,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 164 flow [2023-11-12 02:13:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:13:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2023-11-12 02:13:57,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513546798029557 [2023-11-12 02:13:57,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2023-11-12 02:13:57,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2023-11-12 02:13:57,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:57,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2023-11-12 02:13:57,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:57,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:57,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:57,428 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 110 flow. Second operand 4 states and 733 transitions. [2023-11-12 02:13:57,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 164 flow [2023-11-12 02:13:57,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 33 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:57,431 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 104 flow [2023-11-12 02:13:57,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-12 02:13:57,432 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-11-12 02:13:57,432 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 104 flow [2023-11-12 02:13:57,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.75) internal successors, (703), 4 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:57,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:57,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:13:57,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:57,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:57,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:13:57,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 921857, now seen corresponding path program 1 times [2023-11-12 02:13:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891608253] [2023-11-12 02:13:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:57,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891608253] [2023-11-12 02:13:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891608253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:57,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728978831] [2023-11-12 02:13:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:57,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:57,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:57,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:13:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:57,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:13:57,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:57,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728978831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:57,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:57,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-12 02:13:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789997752] [2023-11-12 02:13:57,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:57,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:13:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:13:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:57,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:13:57,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 176.14285714285714) internal successors, (1233), 7 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:57,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:57,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:13:57,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:58,094 INFO L124 PetriNetUnfolderBase]: 285/458 cut-off events. [2023-11-12 02:13:58,094 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:13:58,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 458 events. 285/458 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 1922 event pairs, 177 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 882. Up to 442 conditions per place. [2023-11-12 02:13:58,099 INFO L140 encePairwiseOnDemand]: 399/406 looper letters, 26 selfloop transitions, 17 changer transitions 0/45 dead transitions. [2023-11-12 02:13:58,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 250 flow [2023-11-12 02:13:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:13:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:13:58,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1099 transitions. [2023-11-12 02:13:58,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511494252873563 [2023-11-12 02:13:58,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1099 transitions. [2023-11-12 02:13:58,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1099 transitions. [2023-11-12 02:13:58,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:58,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1099 transitions. [2023-11-12 02:13:58,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,117 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,118 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 104 flow. Second operand 6 states and 1099 transitions. [2023-11-12 02:13:58,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 250 flow [2023-11-12 02:13:58,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:13:58,121 INFO L231 Difference]: Finished difference. Result has 40 places, 45 transitions, 220 flow [2023-11-12 02:13:58,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=40, PETRI_TRANSITIONS=45} [2023-11-12 02:13:58,122 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-11-12 02:13:58,122 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 45 transitions, 220 flow [2023-11-12 02:13:58,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.14285714285714) internal successors, (1233), 7 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:58,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 02:13:58,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:58,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:58,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:13:58,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:58,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1710644803, now seen corresponding path program 1 times [2023-11-12 02:13:58,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:58,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33208853] [2023-11-12 02:13:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:58,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:58,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:58,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33208853] [2023-11-12 02:13:58,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33208853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:58,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:13:58,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:13:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547628673] [2023-11-12 02:13:58,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:58,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:13:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:13:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:13:58,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 406 [2023-11-12 02:13:58,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 45 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:58,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 406 [2023-11-12 02:13:58,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:58,733 INFO L124 PetriNetUnfolderBase]: 305/510 cut-off events. [2023-11-12 02:13:58,733 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:13:58,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 510 events. 305/510 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2273 event pairs, 198 based on Foata normal form. 6/267 useless extension candidates. Maximal degree in co-relation 1039. Up to 448 conditions per place. [2023-11-12 02:13:58,739 INFO L140 encePairwiseOnDemand]: 397/406 looper letters, 44 selfloop transitions, 7 changer transitions 2/55 dead transitions. [2023-11-12 02:13:58,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 350 flow [2023-11-12 02:13:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:13:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:13:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 729 transitions. [2023-11-12 02:13:58,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44889162561576357 [2023-11-12 02:13:58,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 729 transitions. [2023-11-12 02:13:58,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 729 transitions. [2023-11-12 02:13:58,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:58,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 729 transitions. [2023-11-12 02:13:58,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,753 INFO L175 Difference]: Start difference. First operand has 40 places, 45 transitions, 220 flow. Second operand 4 states and 729 transitions. [2023-11-12 02:13:58,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 350 flow [2023-11-12 02:13:58,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 324 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-12 02:13:58,758 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 221 flow [2023-11-12 02:13:58,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-11-12 02:13:58,759 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-11-12 02:13:58,759 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 221 flow [2023-11-12 02:13:58,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:58,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:58,760 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-12 02:13:58,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:13:58,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:13:58,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1694140748, now seen corresponding path program 2 times [2023-11-12 02:13:58,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:58,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910562584] [2023-11-12 02:13:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:58,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:58,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:58,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910562584] [2023-11-12 02:13:58,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910562584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:58,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814855231] [2023-11-12 02:13:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:13:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:58,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:58,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:13:59,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:13:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:13:59,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:13:59,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:13:59,048 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:59,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814855231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:59,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:59,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-11-12 02:13:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853902176] [2023-11-12 02:13:59,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:13:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:13:59,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:13:59,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 406 [2023-11-12 02:13:59,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:59,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:59,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 406 [2023-11-12 02:13:59,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:13:59,219 INFO L124 PetriNetUnfolderBase]: 305/509 cut-off events. [2023-11-12 02:13:59,219 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-11-12 02:13:59,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 509 events. 305/509 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2341 event pairs, 198 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 1177. Up to 496 conditions per place. [2023-11-12 02:13:59,224 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 36 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-11-12 02:13:59,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 295 flow [2023-11-12 02:13:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:13:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:13:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-11-12 02:13:59,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630541871921182 [2023-11-12 02:13:59,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-11-12 02:13:59,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-11-12 02:13:59,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:13:59,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-11-12 02:13:59,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:59,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:59,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:59,235 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 221 flow. Second operand 3 states and 564 transitions. [2023-11-12 02:13:59,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 295 flow [2023-11-12 02:13:59,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 287 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:13:59,241 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 215 flow [2023-11-12 02:13:59,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-11-12 02:13:59,243 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-11-12 02:13:59,244 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 215 flow [2023-11-12 02:13:59,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:59,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:13:59,245 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-12 02:13:59,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:59,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:59,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:13:59,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1508395816, now seen corresponding path program 1 times [2023-11-12 02:13:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:59,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105124164] [2023-11-12 02:13:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:59,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:59,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:59,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105124164] [2023-11-12 02:13:59,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105124164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090823351] [2023-11-12 02:13:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:59,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:59,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:59,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:59,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:13:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:13:59,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:59,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:13:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:13:59,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090823351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:13:59,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:13:59,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:13:59,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656588658] [2023-11-12 02:13:59,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:13:59,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:13:59,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:13:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:13:59,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:13:59,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 215 flow. Second operand has 13 states, 13 states have (on average 176.15384615384616) internal successors, (2290), 13 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:13:59,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:13:59,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:13:59,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:00,121 INFO L124 PetriNetUnfolderBase]: 317/533 cut-off events. [2023-11-12 02:14:00,122 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-11-12 02:14:00,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 533 events. 317/533 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2435 event pairs, 198 based on Foata normal form. 6/324 useless extension candidates. Maximal degree in co-relation 1223. Up to 496 conditions per place. [2023-11-12 02:14:00,127 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 25 selfloop transitions, 41 changer transitions 0/68 dead transitions. [2023-11-12 02:14:00,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 515 flow [2023-11-12 02:14:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:14:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:14:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2172 transitions. [2023-11-12 02:14:00,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458128078817734 [2023-11-12 02:14:00,138 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2172 transitions. [2023-11-12 02:14:00,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2172 transitions. [2023-11-12 02:14:00,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:00,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2172 transitions. [2023-11-12 02:14:00,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 181.0) internal successors, (2172), 12 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 406.0) internal successors, (5278), 13 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,160 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 406.0) internal successors, (5278), 13 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,161 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 215 flow. Second operand 12 states and 2172 transitions. [2023-11-12 02:14:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 515 flow [2023-11-12 02:14:00,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 68 transitions, 491 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:14:00,167 INFO L231 Difference]: Finished difference. Result has 58 places, 68 transitions, 495 flow [2023-11-12 02:14:00,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=495, PETRI_PLACES=58, PETRI_TRANSITIONS=68} [2023-11-12 02:14:00,170 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-11-12 02:14:00,170 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 68 transitions, 495 flow [2023-11-12 02:14:00,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 176.15384615384616) internal successors, (2290), 13 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:00,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:00,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:00,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:00,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:00,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1507814755, now seen corresponding path program 1 times [2023-11-12 02:14:00,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:00,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442952667] [2023-11-12 02:14:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:00,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:00,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442952667] [2023-11-12 02:14:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442952667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540193674] [2023-11-12 02:14:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:00,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:00,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:00,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:00,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:00,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:00,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540193674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:00,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:00,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-12 02:14:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948572029] [2023-11-12 02:14:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:00,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 406 [2023-11-12 02:14:00,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 68 transitions, 495 flow. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:00,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 406 [2023-11-12 02:14:00,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:00,780 INFO L124 PetriNetUnfolderBase]: 249/431 cut-off events. [2023-11-12 02:14:00,780 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-12 02:14:00,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1140 conditions, 431 events. 249/431 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 1902 event pairs, 155 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 1057. Up to 424 conditions per place. [2023-11-12 02:14:00,785 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 63 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-11-12 02:14:00,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 615 flow [2023-11-12 02:14:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:14:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-11-12 02:14:00,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720853858784893 [2023-11-12 02:14:00,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-11-12 02:14:00,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-11-12 02:14:00,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:00,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-11-12 02:14:00,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,794 INFO L175 Difference]: Start difference. First operand has 58 places, 68 transitions, 495 flow. Second operand 3 states and 575 transitions. [2023-11-12 02:14:00,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 615 flow [2023-11-12 02:14:00,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 491 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-11-12 02:14:00,799 INFO L231 Difference]: Finished difference. Result has 53 places, 66 transitions, 365 flow [2023-11-12 02:14:00,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=53, PETRI_TRANSITIONS=66} [2023-11-12 02:14:00,800 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-11-12 02:14:00,800 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 66 transitions, 365 flow [2023-11-12 02:14:00,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:00,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:00,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:00,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:01,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:14:01,007 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:01,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1036825173, now seen corresponding path program 1 times [2023-11-12 02:14:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:01,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716027893] [2023-11-12 02:14:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:01,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:01,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716027893] [2023-11-12 02:14:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716027893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:14:01,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780599070] [2023-11-12 02:14:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:01,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:01,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:14:01,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 406 [2023-11-12 02:14:01,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:01,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 406 [2023-11-12 02:14:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:01,393 INFO L124 PetriNetUnfolderBase]: 282/523 cut-off events. [2023-11-12 02:14:01,393 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-12 02:14:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 523 events. 282/523 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2554 event pairs, 179 based on Foata normal form. 6/382 useless extension candidates. Maximal degree in co-relation 1310. Up to 423 conditions per place. [2023-11-12 02:14:01,398 INFO L140 encePairwiseOnDemand]: 395/406 looper letters, 72 selfloop transitions, 4 changer transitions 20/98 dead transitions. [2023-11-12 02:14:01,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 98 transitions, 737 flow [2023-11-12 02:14:01,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:14:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 901 transitions. [2023-11-12 02:14:01,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438423645320197 [2023-11-12 02:14:01,403 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 901 transitions. [2023-11-12 02:14:01,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 901 transitions. [2023-11-12 02:14:01,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:01,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 901 transitions. [2023-11-12 02:14:01,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,412 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,412 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 365 flow. Second operand 5 states and 901 transitions. [2023-11-12 02:14:01,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 98 transitions, 737 flow [2023-11-12 02:14:01,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 736 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:14:01,418 INFO L231 Difference]: Finished difference. Result has 58 places, 67 transitions, 397 flow [2023-11-12 02:14:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=58, PETRI_TRANSITIONS=67} [2023-11-12 02:14:01,421 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-11-12 02:14:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 67 transitions, 397 flow [2023-11-12 02:14:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:01,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:01,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:14:01,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:01,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -791833714, now seen corresponding path program 1 times [2023-11-12 02:14:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808188637] [2023-11-12 02:14:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:14:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:01,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808188637] [2023-11-12 02:14:01,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808188637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:01,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:01,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:14:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829799526] [2023-11-12 02:14:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:01,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:01,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 406 [2023-11-12 02:14:01,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 67 transitions, 397 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:01,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 406 [2023-11-12 02:14:01,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:01,641 INFO L124 PetriNetUnfolderBase]: 248/473 cut-off events. [2023-11-12 02:14:01,641 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-12 02:14:01,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 473 events. 248/473 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2242 event pairs, 94 based on Foata normal form. 8/383 useless extension candidates. Maximal degree in co-relation 1313. Up to 267 conditions per place. [2023-11-12 02:14:01,646 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 70 selfloop transitions, 2 changer transitions 1/75 dead transitions. [2023-11-12 02:14:01,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 566 flow [2023-11-12 02:14:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:14:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-11-12 02:14:01,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753694581280788 [2023-11-12 02:14:01,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-11-12 02:14:01,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-11-12 02:14:01,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:01,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-11-12 02:14:01,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,654 INFO L175 Difference]: Start difference. First operand has 58 places, 67 transitions, 397 flow. Second operand 3 states and 579 transitions. [2023-11-12 02:14:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 566 flow [2023-11-12 02:14:01,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 545 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:14:01,660 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 396 flow [2023-11-12 02:14:01,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-11-12 02:14:01,661 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-11-12 02:14:01,661 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 396 flow [2023-11-12 02:14:01,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:01,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:01,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:14:01,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:01,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1326276896, now seen corresponding path program 1 times [2023-11-12 02:14:01,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:01,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180931508] [2023-11-12 02:14:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:01,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180931508] [2023-11-12 02:14:01,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180931508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042389354] [2023-11-12 02:14:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:01,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:01,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:01,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:01,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:14:01,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:01,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:01,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042389354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:01,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:01,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-11-12 02:14:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11439962] [2023-11-12 02:14:01,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:01,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:01,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:01,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 406 [2023-11-12 02:14:01,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:01,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:01,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 406 [2023-11-12 02:14:01,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:02,036 INFO L124 PetriNetUnfolderBase]: 193/378 cut-off events. [2023-11-12 02:14:02,036 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-11-12 02:14:02,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 378 events. 193/378 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1701 event pairs, 129 based on Foata normal form. 28/358 useless extension candidates. Maximal degree in co-relation 1120. Up to 367 conditions per place. [2023-11-12 02:14:02,040 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 62 selfloop transitions, 1 changer transitions 1/66 dead transitions. [2023-11-12 02:14:02,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 514 flow [2023-11-12 02:14:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:14:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 573 transitions. [2023-11-12 02:14:02,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47044334975369456 [2023-11-12 02:14:02,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 573 transitions. [2023-11-12 02:14:02,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 573 transitions. [2023-11-12 02:14:02,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:02,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 573 transitions. [2023-11-12 02:14:02,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,049 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 396 flow. Second operand 3 states and 573 transitions. [2023-11-12 02:14:02,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 514 flow [2023-11-12 02:14:02,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 504 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-12 02:14:02,054 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 369 flow [2023-11-12 02:14:02,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=369, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-11-12 02:14:02,055 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-11-12 02:14:02,055 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 369 flow [2023-11-12 02:14:02,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:02,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:02,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:02,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:02,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:02,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash -558014503, now seen corresponding path program 1 times [2023-11-12 02:14:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:02,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931591541] [2023-11-12 02:14:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:02,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:02,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:14:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:02,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931591541] [2023-11-12 02:14:02,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931591541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:02,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:14:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836778317] [2023-11-12 02:14:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:14:02,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:14:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:14:02,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 406 [2023-11-12 02:14:02,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:02,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 406 [2023-11-12 02:14:02,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:02,478 INFO L124 PetriNetUnfolderBase]: 155/308 cut-off events. [2023-11-12 02:14:02,479 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-11-12 02:14:02,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 308 events. 155/308 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1170 event pairs, 64 based on Foata normal form. 6/270 useless extension candidates. Maximal degree in co-relation 890. Up to 174 conditions per place. [2023-11-12 02:14:02,481 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 66 selfloop transitions, 2 changer transitions 4/74 dead transitions. [2023-11-12 02:14:02,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 540 flow [2023-11-12 02:14:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:14:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:14:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-11-12 02:14:02,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47372742200328405 [2023-11-12 02:14:02,485 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-11-12 02:14:02,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-11-12 02:14:02,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:02,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-11-12 02:14:02,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,491 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,491 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 369 flow. Second operand 3 states and 577 transitions. [2023-11-12 02:14:02,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 540 flow [2023-11-12 02:14:02,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:14:02,496 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 386 flow [2023-11-12 02:14:02,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2023-11-12 02:14:02,497 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-11-12 02:14:02,497 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 386 flow [2023-11-12 02:14:02,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:02,498 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-12 02:14:02,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:14:02,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:02,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash -330096856, now seen corresponding path program 2 times [2023-11-12 02:14:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:02,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520743915] [2023-11-12 02:14:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:02,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:02,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520743915] [2023-11-12 02:14:02,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520743915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:02,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002218622] [2023-11-12 02:14:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:02,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:02,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:02,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:02,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:14:02,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:02,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:14:02,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 02:14:02,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:02,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002218622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:02,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-11-12 02:14:02,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139523454] [2023-11-12 02:14:02,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:14:02,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 406 [2023-11-12 02:14:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 406 [2023-11-12 02:14:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:03,055 INFO L124 PetriNetUnfolderBase]: 155/308 cut-off events. [2023-11-12 02:14:03,055 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-12 02:14:03,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 308 events. 155/308 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1239 event pairs, 103 based on Foata normal form. 2/266 useless extension candidates. Maximal degree in co-relation 942. Up to 255 conditions per place. [2023-11-12 02:14:03,058 INFO L140 encePairwiseOnDemand]: 403/406 looper letters, 50 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2023-11-12 02:14:03,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 65 transitions, 490 flow [2023-11-12 02:14:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:14:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 730 transitions. [2023-11-12 02:14:03,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44950738916256155 [2023-11-12 02:14:03,063 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 730 transitions. [2023-11-12 02:14:03,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 730 transitions. [2023-11-12 02:14:03,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:03,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 730 transitions. [2023-11-12 02:14:03,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.5) internal successors, (730), 4 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,071 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 386 flow. Second operand 4 states and 730 transitions. [2023-11-12 02:14:03,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 65 transitions, 490 flow [2023-11-12 02:14:03,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 403 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-11-12 02:14:03,075 INFO L231 Difference]: Finished difference. Result has 49 places, 63 transitions, 286 flow [2023-11-12 02:14:03,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=49, PETRI_TRANSITIONS=63} [2023-11-12 02:14:03,076 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-11-12 02:14:03,077 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 63 transitions, 286 flow [2023-11-12 02:14:03,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:03,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:03,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:03,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:03,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:03,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:03,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash -993676705, now seen corresponding path program 1 times [2023-11-12 02:14:03,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:03,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141742285] [2023-11-12 02:14:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:03,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:04,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:04,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141742285] [2023-11-12 02:14:04,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141742285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:04,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523411338] [2023-11-12 02:14:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:04,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:04,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:04,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:14:04,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:04,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:14:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:04,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:14:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:04,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:14:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:04,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:04,561 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2023-11-12 02:14:04,718 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:04,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-11-12 02:14:04,733 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:04,733 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 159 [2023-11-12 02:14:04,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-11-12 02:14:04,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-12 02:14:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523411338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:04,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:04,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-12 02:14:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509577108] [2023-11-12 02:14:04,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-12 02:14:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-12 02:14:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2023-11-12 02:14:05,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 406 [2023-11-12 02:14:05,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 63 transitions, 286 flow. Second operand has 19 states, 19 states have (on average 132.6315789473684) internal successors, (2520), 19 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:05,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:05,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 406 [2023-11-12 02:14:05,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:05,514 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_316 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_316) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))))) (and (or (< c_~q2_back~0 0) .cse0 (< c_~n2~0 (+ c_~q2_back~0 1))) (or (and (= c_~q2_front~0 0) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t1~0#1.base|)) (not (= c_~q2_back~0 0))) .cse0)) is different from false [2023-11-12 02:14:05,985 INFO L124 PetriNetUnfolderBase]: 245/438 cut-off events. [2023-11-12 02:14:05,986 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-11-12 02:14:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 438 events. 245/438 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1739 event pairs, 39 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 1173. Up to 233 conditions per place. [2023-11-12 02:14:05,990 INFO L140 encePairwiseOnDemand]: 397/406 looper letters, 82 selfloop transitions, 28 changer transitions 11/123 dead transitions. [2023-11-12 02:14:05,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 123 transitions, 719 flow [2023-11-12 02:14:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:14:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-12 02:14:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1793 transitions. [2023-11-12 02:14:05,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397120121258052 [2023-11-12 02:14:05,999 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1793 transitions. [2023-11-12 02:14:05,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1793 transitions. [2023-11-12 02:14:06,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:06,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1793 transitions. [2023-11-12 02:14:06,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 406.0) internal successors, (5684), 14 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,025 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 406.0) internal successors, (5684), 14 states have internal predecessors, (5684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,026 INFO L175 Difference]: Start difference. First operand has 49 places, 63 transitions, 286 flow. Second operand 13 states and 1793 transitions. [2023-11-12 02:14:06,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 123 transitions, 719 flow [2023-11-12 02:14:06,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 123 transitions, 695 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-12 02:14:06,031 INFO L231 Difference]: Finished difference. Result has 60 places, 74 transitions, 397 flow [2023-11-12 02:14:06,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=397, PETRI_PLACES=60, PETRI_TRANSITIONS=74} [2023-11-12 02:14:06,032 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-11-12 02:14:06,032 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 74 transitions, 397 flow [2023-11-12 02:14:06,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 132.6315789473684) internal successors, (2520), 19 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:06,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:06,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:06,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:06,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:06,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:06,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash 618849772, now seen corresponding path program 1 times [2023-11-12 02:14:06,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:06,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340481585] [2023-11-12 02:14:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:06,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340481585] [2023-11-12 02:14:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340481585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585998918] [2023-11-12 02:14:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:06,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:06,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:06,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:06,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:14:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:06,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 02:14:06,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:06,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-12 02:14:06,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:06,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-12 02:14:06,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:14:07,047 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 02:14:07,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 02:14:07,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:14:07,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:14:07,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:14:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:07,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:07,903 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:07,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-11-12 02:14:07,930 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:07,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1244 treesize of output 1188 [2023-11-12 02:14:07,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:07,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 194 [2023-11-12 02:14:08,028 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:08,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 182 [2023-11-12 02:14:08,061 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:08,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 197 treesize of output 157 [2023-11-12 02:14:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:14:08,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585998918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:08,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:08,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2023-11-12 02:14:08,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706824681] [2023-11-12 02:14:08,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:08,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:14:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:14:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=263, Unknown=12, NotChecked=0, Total=380 [2023-11-12 02:14:09,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 406 [2023-11-12 02:14:09,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 74 transitions, 397 flow. Second operand has 20 states, 20 states have (on average 124.65) internal successors, (2493), 20 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:09,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:09,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 406 [2023-11-12 02:14:09,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:12,189 INFO L124 PetriNetUnfolderBase]: 687/1214 cut-off events. [2023-11-12 02:14:12,190 INFO L125 PetriNetUnfolderBase]: For 1099/1099 co-relation queries the response was YES. [2023-11-12 02:14:12,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3907 conditions, 1214 events. 687/1214 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6192 event pairs, 149 based on Foata normal form. 0/1000 useless extension candidates. Maximal degree in co-relation 3888. Up to 534 conditions per place. [2023-11-12 02:14:12,203 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 133 selfloop transitions, 61 changer transitions 13/209 dead transitions. [2023-11-12 02:14:12,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 209 transitions, 1458 flow [2023-11-12 02:14:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:14:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-12 02:14:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2590 transitions. [2023-11-12 02:14:12,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31896551724137934 [2023-11-12 02:14:12,215 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2590 transitions. [2023-11-12 02:14:12,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2590 transitions. [2023-11-12 02:14:12,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:12,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2590 transitions. [2023-11-12 02:14:12,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 129.5) internal successors, (2590), 20 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 406.0) internal successors, (8526), 21 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,242 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 406.0) internal successors, (8526), 21 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,242 INFO L175 Difference]: Start difference. First operand has 60 places, 74 transitions, 397 flow. Second operand 20 states and 2590 transitions. [2023-11-12 02:14:12,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 209 transitions, 1458 flow [2023-11-12 02:14:12,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 209 transitions, 1402 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-12 02:14:12,254 INFO L231 Difference]: Finished difference. Result has 89 places, 135 transitions, 1007 flow [2023-11-12 02:14:12,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1007, PETRI_PLACES=89, PETRI_TRANSITIONS=135} [2023-11-12 02:14:12,255 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-11-12 02:14:12,255 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 135 transitions, 1007 flow [2023-11-12 02:14:12,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 124.65) internal successors, (2493), 20 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:12,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:12,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:12,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:12,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:12,463 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:12,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash -993676703, now seen corresponding path program 1 times [2023-11-12 02:14:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264921580] [2023-11-12 02:14:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:13,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264921580] [2023-11-12 02:14:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264921580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587870411] [2023-11-12 02:14:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:13,049 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:13,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:14:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:13,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 02:14:13,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:13,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:14:13,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 02:14:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:13,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:14:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:13,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:13,848 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:13,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-11-12 02:14:13,859 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:13,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 162 [2023-11-12 02:14:13,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-12 02:14:13,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:13,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2023-11-12 02:14:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587870411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:14,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-11-12 02:14:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051680051] [2023-11-12 02:14:14,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:14:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:14:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:14:15,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 406 [2023-11-12 02:14:15,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 135 transitions, 1007 flow. Second operand has 20 states, 20 states have (on average 148.65) internal successors, (2973), 20 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:15,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:15,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 406 [2023-11-12 02:14:15,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:17,828 INFO L124 PetriNetUnfolderBase]: 1187/2119 cut-off events. [2023-11-12 02:14:17,828 INFO L125 PetriNetUnfolderBase]: For 6373/6373 co-relation queries the response was YES. [2023-11-12 02:14:17,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8386 conditions, 2119 events. 1187/2119 cut-off events. For 6373/6373 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12437 event pairs, 109 based on Foata normal form. 14/1953 useless extension candidates. Maximal degree in co-relation 8354. Up to 660 conditions per place. [2023-11-12 02:14:17,858 INFO L140 encePairwiseOnDemand]: 393/406 looper letters, 161 selfloop transitions, 143 changer transitions 11/317 dead transitions. [2023-11-12 02:14:17,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 317 transitions, 2814 flow [2023-11-12 02:14:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:14:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-12 02:14:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3547 transitions. [2023-11-12 02:14:17,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798457913900193 [2023-11-12 02:14:17,873 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3547 transitions. [2023-11-12 02:14:17,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3547 transitions. [2023-11-12 02:14:17,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:17,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3547 transitions. [2023-11-12 02:14:17,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 154.2173913043478) internal successors, (3547), 23 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 406.0) internal successors, (9744), 24 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,905 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 406.0) internal successors, (9744), 24 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,905 INFO L175 Difference]: Start difference. First operand has 89 places, 135 transitions, 1007 flow. Second operand 23 states and 3547 transitions. [2023-11-12 02:14:17,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 317 transitions, 2814 flow [2023-11-12 02:14:17,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 317 transitions, 2701 flow, removed 49 selfloop flow, removed 2 redundant places. [2023-11-12 02:14:17,958 INFO L231 Difference]: Finished difference. Result has 120 places, 217 transitions, 2208 flow [2023-11-12 02:14:17,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2208, PETRI_PLACES=120, PETRI_TRANSITIONS=217} [2023-11-12 02:14:17,960 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-11-12 02:14:17,960 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 217 transitions, 2208 flow [2023-11-12 02:14:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 148.65) internal successors, (2973), 20 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:17,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:17,962 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:17,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:14:18,167 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -196176331, now seen corresponding path program 2 times [2023-11-12 02:14:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:18,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177649326] [2023-11-12 02:14:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:18,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:18,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177649326] [2023-11-12 02:14:18,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177649326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:18,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153252050] [2023-11-12 02:14:18,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:18,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:18,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:18,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:18,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:14:19,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:14:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:19,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:19,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:14:19,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:19,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153252050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:19,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:19,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-11-12 02:14:19,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720021854] [2023-11-12 02:14:19,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:19,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:19,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:19,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:19,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:14:19,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:14:19,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 217 transitions, 2208 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:19,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:14:19,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:19,808 INFO L124 PetriNetUnfolderBase]: 1302/2334 cut-off events. [2023-11-12 02:14:19,808 INFO L125 PetriNetUnfolderBase]: For 11660/11660 co-relation queries the response was YES. [2023-11-12 02:14:19,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11124 conditions, 2334 events. 1302/2334 cut-off events. For 11660/11660 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13964 event pairs, 277 based on Foata normal form. 34/2324 useless extension candidates. Maximal degree in co-relation 11080. Up to 1846 conditions per place. [2023-11-12 02:14:19,844 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 240 selfloop transitions, 28 changer transitions 5/275 dead transitions. [2023-11-12 02:14:19,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 275 transitions, 3263 flow [2023-11-12 02:14:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:14:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 743 transitions. [2023-11-12 02:14:19,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751231527093594 [2023-11-12 02:14:19,847 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 743 transitions. [2023-11-12 02:14:19,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 743 transitions. [2023-11-12 02:14:19,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:19,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 743 transitions. [2023-11-12 02:14:19,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,854 INFO L175 Difference]: Start difference. First operand has 120 places, 217 transitions, 2208 flow. Second operand 4 states and 743 transitions. [2023-11-12 02:14:19,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 275 transitions, 3263 flow [2023-11-12 02:14:19,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 275 transitions, 2872 flow, removed 167 selfloop flow, removed 6 redundant places. [2023-11-12 02:14:19,955 INFO L231 Difference]: Finished difference. Result has 118 places, 237 transitions, 2210 flow [2023-11-12 02:14:19,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2210, PETRI_PLACES=118, PETRI_TRANSITIONS=237} [2023-11-12 02:14:19,956 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 80 predicate places. [2023-11-12 02:14:19,956 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 237 transitions, 2210 flow [2023-11-12 02:14:19,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:19,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:19,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:19,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-12 02:14:20,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:14:20,163 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:20,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2124105692, now seen corresponding path program 1 times [2023-11-12 02:14:20,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:20,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936933139] [2023-11-12 02:14:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:20,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:20,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:20,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936933139] [2023-11-12 02:14:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936933139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718550502] [2023-11-12 02:14:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:20,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:20,951 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:20,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:14:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:21,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:21,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:14:21,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718550502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:21,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:21,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-12 02:14:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269636015] [2023-11-12 02:14:21,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:21,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:21,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:14:21,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 237 transitions, 2210 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:21,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:21,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:14:21,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:21,828 INFO L124 PetriNetUnfolderBase]: 1374/2441 cut-off events. [2023-11-12 02:14:21,828 INFO L125 PetriNetUnfolderBase]: For 8773/8773 co-relation queries the response was YES. [2023-11-12 02:14:21,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10817 conditions, 2441 events. 1374/2441 cut-off events. For 8773/8773 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14482 event pairs, 195 based on Foata normal form. 32/2433 useless extension candidates. Maximal degree in co-relation 10771. Up to 1876 conditions per place. [2023-11-12 02:14:21,867 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 239 selfloop transitions, 22 changer transitions 7/270 dead transitions. [2023-11-12 02:14:21,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 270 transitions, 3043 flow [2023-11-12 02:14:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:14:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 741 transitions. [2023-11-12 02:14:21,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562807881773399 [2023-11-12 02:14:21,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 741 transitions. [2023-11-12 02:14:21,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 741 transitions. [2023-11-12 02:14:21,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:21,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 741 transitions. [2023-11-12 02:14:21,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.25) internal successors, (741), 4 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:21,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:21,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:21,877 INFO L175 Difference]: Start difference. First operand has 118 places, 237 transitions, 2210 flow. Second operand 4 states and 741 transitions. [2023-11-12 02:14:21,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 270 transitions, 3043 flow [2023-11-12 02:14:21,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 270 transitions, 2994 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-12 02:14:21,941 INFO L231 Difference]: Finished difference. Result has 120 places, 245 transitions, 2355 flow [2023-11-12 02:14:21,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2355, PETRI_PLACES=120, PETRI_TRANSITIONS=245} [2023-11-12 02:14:21,942 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-11-12 02:14:21,942 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 245 transitions, 2355 flow [2023-11-12 02:14:21,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:21,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:21,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:21,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:14:22,149 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:22,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash -29387660, now seen corresponding path program 1 times [2023-11-12 02:14:22,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:22,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320041028] [2023-11-12 02:14:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:22,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:22,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320041028] [2023-11-12 02:14:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320041028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114089323] [2023-11-12 02:14:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:22,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:22,282 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:22,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:14:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:14:22,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:22,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114089323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:22,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:14:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079818602] [2023-11-12 02:14:22,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:22,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:14:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:14:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:22,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 406 [2023-11-12 02:14:22,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 245 transitions, 2355 flow. Second operand has 12 states, 12 states have (on average 167.41666666666666) internal successors, (2009), 12 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:22,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:22,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 406 [2023-11-12 02:14:22,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:23,339 INFO L124 PetriNetUnfolderBase]: 1075/2009 cut-off events. [2023-11-12 02:14:23,339 INFO L125 PetriNetUnfolderBase]: For 9174/9174 co-relation queries the response was YES. [2023-11-12 02:14:23,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9005 conditions, 2009 events. 1075/2009 cut-off events. For 9174/9174 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12121 event pairs, 445 based on Foata normal form. 64/2045 useless extension candidates. Maximal degree in co-relation 8958. Up to 1244 conditions per place. [2023-11-12 02:14:23,365 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 200 selfloop transitions, 21 changer transitions 4/227 dead transitions. [2023-11-12 02:14:23,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 227 transitions, 2557 flow [2023-11-12 02:14:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:14:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:14:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-11-12 02:14:23,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42610837438423643 [2023-11-12 02:14:23,368 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-11-12 02:14:23,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-11-12 02:14:23,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:23,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-11-12 02:14:23,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:23,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:23,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:23,376 INFO L175 Difference]: Start difference. First operand has 120 places, 245 transitions, 2355 flow. Second operand 6 states and 1038 transitions. [2023-11-12 02:14:23,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 227 transitions, 2557 flow [2023-11-12 02:14:23,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 227 transitions, 2487 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-11-12 02:14:23,428 INFO L231 Difference]: Finished difference. Result has 116 places, 197 transitions, 1878 flow [2023-11-12 02:14:23,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1878, PETRI_PLACES=116, PETRI_TRANSITIONS=197} [2023-11-12 02:14:23,429 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-11-12 02:14:23,429 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 197 transitions, 1878 flow [2023-11-12 02:14:23,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.41666666666666) internal successors, (2009), 12 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:23,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:23,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:23,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:14:23,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:23,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2009203605, now seen corresponding path program 1 times [2023-11-12 02:14:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899325138] [2023-11-12 02:14:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:23,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899325138] [2023-11-12 02:14:23,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899325138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38913088] [2023-11-12 02:14:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:23,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:23,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:23,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:23,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:14:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:23,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:14:23,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:23,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:24,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38913088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:24,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:24,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:14:24,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102962718] [2023-11-12 02:14:24,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:24,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:14:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:14:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:24,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 406 [2023-11-12 02:14:24,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 197 transitions, 1878 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:24,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:24,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 406 [2023-11-12 02:14:24,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:24,756 INFO L124 PetriNetUnfolderBase]: 943/1846 cut-off events. [2023-11-12 02:14:24,756 INFO L125 PetriNetUnfolderBase]: For 7162/7162 co-relation queries the response was YES. [2023-11-12 02:14:24,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7972 conditions, 1846 events. 943/1846 cut-off events. For 7162/7162 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11450 event pairs, 386 based on Foata normal form. 64/1888 useless extension candidates. Maximal degree in co-relation 7928. Up to 960 conditions per place. [2023-11-12 02:14:24,775 INFO L140 encePairwiseOnDemand]: 401/406 looper letters, 203 selfloop transitions, 14 changer transitions 14/233 dead transitions. [2023-11-12 02:14:24,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 233 transitions, 2591 flow [2023-11-12 02:14:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:14:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1204 transitions. [2023-11-12 02:14:24,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2023-11-12 02:14:24,779 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1204 transitions. [2023-11-12 02:14:24,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1204 transitions. [2023-11-12 02:14:24,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:24,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1204 transitions. [2023-11-12 02:14:24,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 172.0) internal successors, (1204), 7 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:24,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 406.0) internal successors, (3248), 8 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:24,795 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 406.0) internal successors, (3248), 8 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:24,795 INFO L175 Difference]: Start difference. First operand has 116 places, 197 transitions, 1878 flow. Second operand 7 states and 1204 transitions. [2023-11-12 02:14:24,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 233 transitions, 2591 flow [2023-11-12 02:14:24,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 233 transitions, 2518 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-11-12 02:14:24,841 INFO L231 Difference]: Finished difference. Result has 119 places, 178 transitions, 1650 flow [2023-11-12 02:14:24,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1650, PETRI_PLACES=119, PETRI_TRANSITIONS=178} [2023-11-12 02:14:24,842 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2023-11-12 02:14:24,842 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 178 transitions, 1650 flow [2023-11-12 02:14:24,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:24,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:24,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:24,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:25,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:25,049 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:25,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1304707809, now seen corresponding path program 3 times [2023-11-12 02:14:25,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:25,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736567163] [2023-11-12 02:14:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:25,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:14:26,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:26,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736567163] [2023-11-12 02:14:26,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736567163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:26,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556618166] [2023-11-12 02:14:26,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:14:26,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:26,036 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:26,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:14:26,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 02:14:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:26,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:14:26,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:26,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:26,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:14:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:14:26,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:26,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556618166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:26,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:26,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-11-12 02:14:26,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533217764] [2023-11-12 02:14:26,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:14:26,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:14:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:14:26,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 406 [2023-11-12 02:14:26,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 178 transitions, 1650 flow. Second operand has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:26,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:26,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 406 [2023-11-12 02:14:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:26,994 INFO L124 PetriNetUnfolderBase]: 843/1637 cut-off events. [2023-11-12 02:14:26,994 INFO L125 PetriNetUnfolderBase]: For 6811/6811 co-relation queries the response was YES. [2023-11-12 02:14:27,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7080 conditions, 1637 events. 843/1637 cut-off events. For 6811/6811 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9775 event pairs, 197 based on Foata normal form. 72/1677 useless extension candidates. Maximal degree in co-relation 7034. Up to 987 conditions per place. [2023-11-12 02:14:27,008 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 119 selfloop transitions, 69 changer transitions 5/195 dead transitions. [2023-11-12 02:14:27,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2110 flow [2023-11-12 02:14:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:14:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:14:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 868 transitions. [2023-11-12 02:14:27,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42758620689655175 [2023-11-12 02:14:27,012 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 868 transitions. [2023-11-12 02:14:27,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 868 transitions. [2023-11-12 02:14:27,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:27,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 868 transitions. [2023-11-12 02:14:27,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:27,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:27,017 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 406.0) internal successors, (2436), 6 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:27,018 INFO L175 Difference]: Start difference. First operand has 119 places, 178 transitions, 1650 flow. Second operand 5 states and 868 transitions. [2023-11-12 02:14:27,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2110 flow [2023-11-12 02:14:27,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 2039 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-12 02:14:27,053 INFO L231 Difference]: Finished difference. Result has 113 places, 171 transitions, 1697 flow [2023-11-12 02:14:27,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1697, PETRI_PLACES=113, PETRI_TRANSITIONS=171} [2023-11-12 02:14:27,054 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-11-12 02:14:27,054 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 171 transitions, 1697 flow [2023-11-12 02:14:27,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.57142857142858) internal successors, (1166), 7 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:27,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:27,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:27,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:27,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:27,262 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:27,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 525040015, now seen corresponding path program 2 times [2023-11-12 02:14:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165510298] [2023-11-12 02:14:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 02:14:27,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:27,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165510298] [2023-11-12 02:14:27,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165510298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:27,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313869230] [2023-11-12 02:14:27,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:27,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:27,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:27,875 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:27,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:14:28,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:14:28,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:28,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:28,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:28,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:28,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313869230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:28,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:28,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-12 02:14:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036253537] [2023-11-12 02:14:28,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:28,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:14:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:14:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:28,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 406 [2023-11-12 02:14:28,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 171 transitions, 1697 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:28,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:14:28,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 406 [2023-11-12 02:14:28,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:14:28,463 INFO L124 PetriNetUnfolderBase]: 797/1559 cut-off events. [2023-11-12 02:14:28,463 INFO L125 PetriNetUnfolderBase]: For 6370/6378 co-relation queries the response was YES. [2023-11-12 02:14:28,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6995 conditions, 1559 events. 797/1559 cut-off events. For 6370/6378 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9198 event pairs, 170 based on Foata normal form. 32/1557 useless extension candidates. Maximal degree in co-relation 6952. Up to 1084 conditions per place. [2023-11-12 02:14:28,480 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 167 selfloop transitions, 13 changer transitions 7/189 dead transitions. [2023-11-12 02:14:28,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 189 transitions, 2189 flow [2023-11-12 02:14:28,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:14:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:14:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-11-12 02:14:28,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45566502463054187 [2023-11-12 02:14:28,483 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-11-12 02:14:28,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-11-12 02:14:28,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:14:28,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-11-12 02:14:28,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:28,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:28,487 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:28,487 INFO L175 Difference]: Start difference. First operand has 113 places, 171 transitions, 1697 flow. Second operand 4 states and 740 transitions. [2023-11-12 02:14:28,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 189 transitions, 2189 flow [2023-11-12 02:14:28,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 189 transitions, 2093 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-12 02:14:28,513 INFO L231 Difference]: Finished difference. Result has 113 places, 167 transitions, 1585 flow [2023-11-12 02:14:28,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1585, PETRI_PLACES=113, PETRI_TRANSITIONS=167} [2023-11-12 02:14:28,514 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-11-12 02:14:28,514 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 167 transitions, 1585 flow [2023-11-12 02:14:28,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:14:28,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:14:28,515 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:28,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:28,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_689398a7-07c2-4cda-a16d-7993c7c3f425/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:28,721 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2023-11-12 02:14:28,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1434234871, now seen corresponding path program 2 times [2023-11-12 02:14:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:28,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570967404] [2023-11-12 02:14:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:28,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat