./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:27:36,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:27:36,825 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-23 22:27:36,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:27:36,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:27:36,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:27:36,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:27:36,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:27:36,877 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:27:36,884 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:27:36,885 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:27:36,886 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:27:36,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:27:36,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:27:36,890 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:27:36,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:27:36,891 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:27:36,891 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:27:36,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:27:36,892 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:27:36,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:27:36,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:27:36,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:27:36,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:27:36,895 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 22:27:36,895 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:27:36,896 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:27:36,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:27:36,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:27:36,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:27:36,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:27:36,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:27:36,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:27:36,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:36,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:27:36,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:27:36,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:27:36,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:27:36,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:27:36,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:27:36,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:27:36,903 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:27:36,903 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:27:36,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:27:36,904 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_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2023-11-23 22:27:37,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:27:37,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:27:37,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:27:37,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:27:37,322 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:27:37,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-23 22:27:40,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:27:40,595 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:27:40,596 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-23 22:27:40,605 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/data/d246098da/744bb1f100cf4eb8947495f4fabac636/FLAGcecc35826 [2023-11-23 22:27:40,622 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/data/d246098da/744bb1f100cf4eb8947495f4fabac636 [2023-11-23 22:27:40,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:27:40,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:27:40,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:40,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:27:40,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:27:40,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:40,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f687c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40, skipping insertion in model container [2023-11-23 22:27:40,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:40,673 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:27:40,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:40,871 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:27:40,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:27:40,899 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:27:40,899 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:27:40,906 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:27:40,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40 WrapperNode [2023-11-23 22:27:40,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:27:40,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:40,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:27:40,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:27:40,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:40,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:40,962 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2023-11-23 22:27:40,962 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:27:40,963 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:27:40,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:27:40,964 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:27:40,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:40,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:40,995 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,041 INFO L189 HeapSplitter]: Split 6 memory accesses to 3 slices as follows [2, 2, 2] [2023-11-23 22:27:41,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,055 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,058 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:27:41,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:27:41,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:27:41,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:27:41,064 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (1/1) ... [2023-11-23 22:27:41,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:27:41,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:41,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:27:41,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:27:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:27:41,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 22:27:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 22:27:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 22:27:41,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 22:27:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:27:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:27:41,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:27:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:27:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:27:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:27:41,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:27:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:27:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:27:41,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:27:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:27:41,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:27:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:27:41,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:27:41,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:27:41,156 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:27:41,324 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:27:41,327 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:27:41,598 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:27:41,774 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:27:41,775 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 22:27:41,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:41 BoogieIcfgContainer [2023-11-23 22:27:41,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:27:41,778 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:27:41,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:27:41,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:27:41,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:40" (1/3) ... [2023-11-23 22:27:41,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b759cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:41, skipping insertion in model container [2023-11-23 22:27:41,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:40" (2/3) ... [2023-11-23 22:27:41,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b759cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:41, skipping insertion in model container [2023-11-23 22:27:41,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:41" (3/3) ... [2023-11-23 22:27:41,789 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-23 22:27:41,798 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:27:41,807 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:27:41,808 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 22:27:41,808 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:27:41,885 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 22:27:41,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 33 transitions, 80 flow [2023-11-23 22:27:41,966 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-11-23 22:27:41,966 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:27:41,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 2/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 74 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-23 22:27:41,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 33 transitions, 80 flow [2023-11-23 22:27:41,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 29 transitions, 67 flow [2023-11-23 22:27:41,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:27:42,001 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;@4259144f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:27:42,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-23 22:27:42,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:27:42,009 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-23 22:27:42,009 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:27:42,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:42,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:27:42,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:42,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash 262316732, now seen corresponding path program 1 times [2023-11-23 22:27:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750747108] [2023-11-23 22:27:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:42,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:42,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750747108] [2023-11-23 22:27:42,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750747108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:42,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:42,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:42,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890290914] [2023-11-23 22:27:42,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:42,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:42,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:42,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:27:42,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:42,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:27:42,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:42,430 INFO L124 PetriNetUnfolderBase]: 96/197 cut-off events. [2023-11-23 22:27:42,431 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-23 22:27:42,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 197 events. 96/197 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 833 event pairs, 72 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 330. Up to 167 conditions per place. [2023-11-23 22:27:42,447 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 16 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-23 22:27:42,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 97 flow [2023-11-23 22:27:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-23 22:27:42,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-23 22:27:42,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-23 22:27:42,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-23 22:27:42,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:42,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-23 22:27:42,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,481 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 67 flow. Second operand 3 states and 55 transitions. [2023-11-23 22:27:42,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 97 flow [2023-11-23 22:27:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 27 transitions, 92 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:27:42,490 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 60 flow [2023-11-23 22:27:42,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-23 22:27:42,496 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-11-23 22:27:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 60 flow [2023-11-23 22:27:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:42,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 22:27:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:27:42,498 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:42,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 262316733, now seen corresponding path program 1 times [2023-11-23 22:27:42,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:42,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464525524] [2023-11-23 22:27:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:42,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:42,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464525524] [2023-11-23 22:27:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464525524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:42,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:42,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:27:42,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736006532] [2023-11-23 22:27:42,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:42,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:27:42,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:27:42,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:27:42,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:27:42,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:42,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:27:42,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:42,842 INFO L124 PetriNetUnfolderBase]: 110/267 cut-off events. [2023-11-23 22:27:42,843 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:27:42,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 267 events. 110/267 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1157 event pairs, 40 based on Foata normal form. 5/232 useless extension candidates. Maximal degree in co-relation 479. Up to 145 conditions per place. [2023-11-23 22:27:42,846 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 21 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2023-11-23 22:27:42,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 133 flow [2023-11-23 22:27:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:27:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:27:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-23 22:27:42,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-23 22:27:42,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-23 22:27:42,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-23 22:27:42,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:42,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-23 22:27:42,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,857 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 3 states and 65 transitions. [2023-11-23 22:27:42,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 133 flow [2023-11-23 22:27:42,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:42,861 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 75 flow [2023-11-23 22:27:42,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-23 22:27:42,862 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-11-23 22:27:42,862 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 75 flow [2023-11-23 22:27:42,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:42,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:42,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:42,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:27:42,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:42,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1316680993, now seen corresponding path program 1 times [2023-11-23 22:27:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:42,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059907965] [2023-11-23 22:27:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059907965] [2023-11-23 22:27:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059907965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:43,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:27:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818886048] [2023-11-23 22:27:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:43,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:43,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:43,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-23 22:27:43,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:43,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-23 22:27:43,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:43,244 INFO L124 PetriNetUnfolderBase]: 195/392 cut-off events. [2023-11-23 22:27:43,245 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-23 22:27:43,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 392 events. 195/392 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1779 event pairs, 96 based on Foata normal form. 12/354 useless extension candidates. Maximal degree in co-relation 839. Up to 274 conditions per place. [2023-11-23 22:27:43,255 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 36 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-11-23 22:27:43,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 205 flow [2023-11-23 22:27:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:27:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2023-11-23 22:27:43,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2023-11-23 22:27:43,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 78 transitions. [2023-11-23 22:27:43,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 78 transitions. [2023-11-23 22:27:43,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:43,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 78 transitions. [2023-11-23 22:27:43,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,266 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 75 flow. Second operand 4 states and 78 transitions. [2023-11-23 22:27:43,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 205 flow [2023-11-23 22:27:43,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:43,269 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 97 flow [2023-11-23 22:27:43,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-11-23 22:27:43,270 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-11-23 22:27:43,271 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 97 flow [2023-11-23 22:27:43,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:43,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:43,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:27:43,272 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:43,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:43,273 INFO L85 PathProgramCache]: Analyzing trace with hash -642554319, now seen corresponding path program 1 times [2023-11-23 22:27:43,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:43,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832644140] [2023-11-23 22:27:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:43,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:43,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:43,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832644140] [2023-11-23 22:27:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832644140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:43,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:43,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:27:43,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094452892] [2023-11-23 22:27:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:43,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:43,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:43,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:27:43,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:43,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:27:43,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:43,489 INFO L124 PetriNetUnfolderBase]: 185/500 cut-off events. [2023-11-23 22:27:43,489 INFO L125 PetriNetUnfolderBase]: For 133/145 co-relation queries the response was YES. [2023-11-23 22:27:43,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 500 events. 185/500 cut-off events. For 133/145 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2685 event pairs, 39 based on Foata normal form. 14/469 useless extension candidates. Maximal degree in co-relation 1073. Up to 147 conditions per place. [2023-11-23 22:27:43,509 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-23 22:27:43,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 254 flow [2023-11-23 22:27:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:27:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2023-11-23 22:27:43,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2023-11-23 22:27:43,512 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 93 transitions. [2023-11-23 22:27:43,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 93 transitions. [2023-11-23 22:27:43,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:43,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 93 transitions. [2023-11-23 22:27:43,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,515 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,515 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 97 flow. Second operand 4 states and 93 transitions. [2023-11-23 22:27:43,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 254 flow [2023-11-23 22:27:43,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:43,519 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 139 flow [2023-11-23 22:27:43,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-23 22:27:43,520 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-11-23 22:27:43,521 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 139 flow [2023-11-23 22:27:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:43,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:43,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:27:43,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:43,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1502687165, now seen corresponding path program 1 times [2023-11-23 22:27:43,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:43,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059814927] [2023-11-23 22:27:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:43,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:43,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:43,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059814927] [2023-11-23 22:27:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059814927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:43,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:27:43,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:27:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283822758] [2023-11-23 22:27:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:43,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:27:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:27:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:27:43,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-23 22:27:43,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:43,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-23 22:27:43,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:43,852 INFO L124 PetriNetUnfolderBase]: 414/830 cut-off events. [2023-11-23 22:27:43,852 INFO L125 PetriNetUnfolderBase]: For 750/845 co-relation queries the response was YES. [2023-11-23 22:27:43,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 830 events. 414/830 cut-off events. For 750/845 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4171 event pairs, 221 based on Foata normal form. 39/809 useless extension candidates. Maximal degree in co-relation 2157. Up to 523 conditions per place. [2023-11-23 22:27:43,862 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 49 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-23 22:27:43,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 383 flow [2023-11-23 22:27:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:27:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:27:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2023-11-23 22:27:43,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2023-11-23 22:27:43,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 78 transitions. [2023-11-23 22:27:43,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 78 transitions. [2023-11-23 22:27:43,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:43,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 78 transitions. [2023-11-23 22:27:43,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,869 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 139 flow. Second operand 4 states and 78 transitions. [2023-11-23 22:27:43,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 383 flow [2023-11-23 22:27:43,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 373 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-23 22:27:43,879 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 164 flow [2023-11-23 22:27:43,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-11-23 22:27:43,883 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-11-23 22:27:43,883 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 164 flow [2023-11-23 22:27:43,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:43,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:43,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:43,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:27:43,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:43,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash 384362310, now seen corresponding path program 1 times [2023-11-23 22:27:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:43,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782013541] [2023-11-23 22:27:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:43,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:43,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782013541] [2023-11-23 22:27:43,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782013541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666772752] [2023-11-23 22:27:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:43,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:43,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:43,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:27:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:44,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:44,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:44,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:44,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666772752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:44,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:27:44,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 22:27:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934640980] [2023-11-23 22:27:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:44,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:27:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:27:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:44,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-23 22:27:44,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:44,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:44,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-23 22:27:44,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:44,495 INFO L124 PetriNetUnfolderBase]: 382/808 cut-off events. [2023-11-23 22:27:44,495 INFO L125 PetriNetUnfolderBase]: For 728/778 co-relation queries the response was YES. [2023-11-23 22:27:44,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2350 conditions, 808 events. 382/808 cut-off events. For 728/778 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4209 event pairs, 62 based on Foata normal form. 54/795 useless extension candidates. Maximal degree in co-relation 2334. Up to 239 conditions per place. [2023-11-23 22:27:44,504 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 58 selfloop transitions, 6 changer transitions 1/73 dead transitions. [2023-11-23 22:27:44,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 462 flow [2023-11-23 22:27:44,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:27:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2023-11-23 22:27:44,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404040404040404 [2023-11-23 22:27:44,509 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2023-11-23 22:27:44,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2023-11-23 22:27:44,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:44,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2023-11-23 22:27:44,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:44,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:44,513 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:44,514 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 164 flow. Second operand 6 states and 107 transitions. [2023-11-23 22:27:44,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 462 flow [2023-11-23 22:27:44,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 447 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:44,520 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 169 flow [2023-11-23 22:27:44,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=169, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-11-23 22:27:44,523 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-11-23 22:27:44,524 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 169 flow [2023-11-23 22:27:44,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:44,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:44,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-23 22:27:44,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:44,748 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:44,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -969669991, now seen corresponding path program 1 times [2023-11-23 22:27:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301143698] [2023-11-23 22:27:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:44,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301143698] [2023-11-23 22:27:44,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301143698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200070080] [2023-11-23 22:27:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:44,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:44,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:44,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:44,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:27:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:44,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:44,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:44,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:45,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200070080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:45,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:45,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 22:27:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936521125] [2023-11-23 22:27:45,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:45,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:27:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:27:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:27:45,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-23 22:27:45,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 169 flow. Second operand has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:45,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:45,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-23 22:27:45,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:45,597 INFO L124 PetriNetUnfolderBase]: 847/1704 cut-off events. [2023-11-23 22:27:45,597 INFO L125 PetriNetUnfolderBase]: For 2297/2443 co-relation queries the response was YES. [2023-11-23 22:27:45,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5245 conditions, 1704 events. 847/1704 cut-off events. For 2297/2443 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9061 event pairs, 158 based on Foata normal form. 136/1761 useless extension candidates. Maximal degree in co-relation 5229. Up to 622 conditions per place. [2023-11-23 22:27:45,616 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 116 selfloop transitions, 11 changer transitions 1/136 dead transitions. [2023-11-23 22:27:45,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 136 transitions, 906 flow [2023-11-23 22:27:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:27:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:27:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2023-11-23 22:27:45,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787878787878787 [2023-11-23 22:27:45,619 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 191 transitions. [2023-11-23 22:27:45,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 191 transitions. [2023-11-23 22:27:45,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:45,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 191 transitions. [2023-11-23 22:27:45,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.1) internal successors, (191), 10 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:45,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:45,622 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:45,622 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 169 flow. Second operand 10 states and 191 transitions. [2023-11-23 22:27:45,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 136 transitions, 906 flow [2023-11-23 22:27:45,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 136 transitions, 879 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-23 22:27:45,631 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 233 flow [2023-11-23 22:27:45,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=233, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-11-23 22:27:45,633 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-11-23 22:27:45,633 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 233 flow [2023-11-23 22:27:45,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:45,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:45,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:45,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:45,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:45,855 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:45,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1744823480, now seen corresponding path program 1 times [2023-11-23 22:27:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:45,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841308837] [2023-11-23 22:27:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:45,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:45,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841308837] [2023-11-23 22:27:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841308837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458776338] [2023-11-23 22:27:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:45,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:45,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:27:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:45,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:45,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:46,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:46,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458776338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:46,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:46,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 22:27:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545945033] [2023-11-23 22:27:46,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:46,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:27:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:27:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:46,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:27:46,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:46,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:27:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:46,444 INFO L124 PetriNetUnfolderBase]: 746/1889 cut-off events. [2023-11-23 22:27:46,444 INFO L125 PetriNetUnfolderBase]: For 3577/3702 co-relation queries the response was YES. [2023-11-23 22:27:46,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5598 conditions, 1889 events. 746/1889 cut-off events. For 3577/3702 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11953 event pairs, 87 based on Foata normal form. 124/1999 useless extension candidates. Maximal degree in co-relation 5580. Up to 328 conditions per place. [2023-11-23 22:27:46,466 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 86 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2023-11-23 22:27:46,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 112 transitions, 766 flow [2023-11-23 22:27:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:27:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-23 22:27:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2023-11-23 22:27:46,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6796536796536796 [2023-11-23 22:27:46,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 157 transitions. [2023-11-23 22:27:46,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 157 transitions. [2023-11-23 22:27:46,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:46,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 157 transitions. [2023-11-23 22:27:46,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:46,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:46,470 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:46,470 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 233 flow. Second operand 7 states and 157 transitions. [2023-11-23 22:27:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 112 transitions, 766 flow [2023-11-23 22:27:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 112 transitions, 737 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-23 22:27:46,481 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 320 flow [2023-11-23 22:27:46,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-11-23 22:27:46,482 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2023-11-23 22:27:46,483 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 320 flow [2023-11-23 22:27:46,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:46,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:46,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:46,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:46,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:46,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:46,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:46,705 INFO L85 PathProgramCache]: Analyzing trace with hash 596836720, now seen corresponding path program 1 times [2023-11-23 22:27:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:46,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069268849] [2023-11-23 22:27:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:46,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:46,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:46,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069268849] [2023-11-23 22:27:46,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069268849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:46,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072139072] [2023-11-23 22:27:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:46,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:46,835 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:46,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:27:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:46,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:46,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:46,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:27:46,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072139072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:27:46,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 22:27:46,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 22:27:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771294634] [2023-11-23 22:27:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:27:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:27:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:27:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:27:46,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-23 22:27:46,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:46,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:46,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-23 22:27:46,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:47,465 INFO L124 PetriNetUnfolderBase]: 1141/2392 cut-off events. [2023-11-23 22:27:47,466 INFO L125 PetriNetUnfolderBase]: For 6090/6188 co-relation queries the response was YES. [2023-11-23 22:27:47,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7822 conditions, 2392 events. 1141/2392 cut-off events. For 6090/6188 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14735 event pairs, 182 based on Foata normal form. 102/2372 useless extension candidates. Maximal degree in co-relation 7798. Up to 582 conditions per place. [2023-11-23 22:27:47,493 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 110 selfloop transitions, 7 changer transitions 0/127 dead transitions. [2023-11-23 22:27:47,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 127 transitions, 1147 flow [2023-11-23 22:27:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:27:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:27:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2023-11-23 22:27:47,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353535353535354 [2023-11-23 22:27:47,494 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 106 transitions. [2023-11-23 22:27:47,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 106 transitions. [2023-11-23 22:27:47,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:47,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 106 transitions. [2023-11-23 22:27:47,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:47,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:47,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:47,497 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 320 flow. Second operand 6 states and 106 transitions. [2023-11-23 22:27:47,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 127 transitions, 1147 flow [2023-11-23 22:27:47,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 127 transitions, 1058 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-23 22:27:47,517 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 301 flow [2023-11-23 22:27:47,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2023-11-23 22:27:47,519 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2023-11-23 22:27:47,519 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 301 flow [2023-11-23 22:27:47,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:47,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:47,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:47,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:47,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:47,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1326216092, now seen corresponding path program 1 times [2023-11-23 22:27:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383722280] [2023-11-23 22:27:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383722280] [2023-11-23 22:27:47,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383722280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433169709] [2023-11-23 22:27:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:47,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:47,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:47,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:27:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:47,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 22:27:47,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:47,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:48,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433169709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:48,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:48,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 22:27:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912405337] [2023-11-23 22:27:48,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:48,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:27:48,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:27:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:27:48,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-23 22:27:48,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 301 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:48,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:48,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-23 22:27:48,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:49,008 INFO L124 PetriNetUnfolderBase]: 1834/3870 cut-off events. [2023-11-23 22:27:49,008 INFO L125 PetriNetUnfolderBase]: For 9256/9392 co-relation queries the response was YES. [2023-11-23 22:27:49,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12619 conditions, 3870 events. 1834/3870 cut-off events. For 9256/9392 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 24767 event pairs, 406 based on Foata normal form. 204/4033 useless extension candidates. Maximal degree in co-relation 12595. Up to 1332 conditions per place. [2023-11-23 22:27:49,054 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 188 selfloop transitions, 13 changer transitions 6/217 dead transitions. [2023-11-23 22:27:49,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 217 transitions, 1879 flow [2023-11-23 22:27:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:27:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-23 22:27:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2023-11-23 22:27:49,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2023-11-23 22:27:49,057 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 184 transitions. [2023-11-23 22:27:49,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 184 transitions. [2023-11-23 22:27:49,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:49,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 184 transitions. [2023-11-23 22:27:49,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,060 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,060 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 301 flow. Second operand 10 states and 184 transitions. [2023-11-23 22:27:49,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 217 transitions, 1879 flow [2023-11-23 22:27:49,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 217 transitions, 1849 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-23 22:27:49,094 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 364 flow [2023-11-23 22:27:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=364, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-11-23 22:27:49,095 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2023-11-23 22:27:49,095 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 364 flow [2023-11-23 22:27:49,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:49,096 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-23 22:27:49,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:49,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:49,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:49,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:49,309 INFO L85 PathProgramCache]: Analyzing trace with hash -7591043, now seen corresponding path program 1 times [2023-11-23 22:27:49,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:49,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569412089] [2023-11-23 22:27:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:49,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:49,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569412089] [2023-11-23 22:27:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569412089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408574051] [2023-11-23 22:27:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:49,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:49,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:49,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:27:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:49,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 22:27:49,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:49,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:49,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408574051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:49,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:49,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-23 22:27:49,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471613596] [2023-11-23 22:27:49,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:49,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:27:49,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:27:49,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:27:49,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:27:49,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 364 flow. Second operand has 12 states, 12 states have (on average 14.0) internal successors, (168), 12 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:49,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:49,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:27:49,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:51,355 INFO L124 PetriNetUnfolderBase]: 3357/7578 cut-off events. [2023-11-23 22:27:51,356 INFO L125 PetriNetUnfolderBase]: For 27224/27636 co-relation queries the response was YES. [2023-11-23 22:27:51,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25557 conditions, 7578 events. 3357/7578 cut-off events. For 27224/27636 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 57740 event pairs, 305 based on Foata normal form. 219/7757 useless extension candidates. Maximal degree in co-relation 25531. Up to 1249 conditions per place. [2023-11-23 22:27:51,458 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 221 selfloop transitions, 41 changer transitions 4/282 dead transitions. [2023-11-23 22:27:51,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 282 transitions, 2181 flow [2023-11-23 22:27:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:27:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:27:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2023-11-23 22:27:51,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297979797979798 [2023-11-23 22:27:51,461 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 289 transitions. [2023-11-23 22:27:51,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 289 transitions. [2023-11-23 22:27:51,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:51,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 289 transitions. [2023-11-23 22:27:51,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 24.083333333333332) internal successors, (289), 12 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,465 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 33.0) internal successors, (429), 13 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,465 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 364 flow. Second operand 12 states and 289 transitions. [2023-11-23 22:27:51,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 282 transitions, 2181 flow [2023-11-23 22:27:51,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 282 transitions, 2080 flow, removed 33 selfloop flow, removed 2 redundant places. [2023-11-23 22:27:51,526 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 752 flow [2023-11-23 22:27:51,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=752, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2023-11-23 22:27:51,527 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 59 predicate places. [2023-11-23 22:27:51,527 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 752 flow [2023-11-23 22:27:51,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.0) internal successors, (168), 12 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:51,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:51,528 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2023-11-23 22:27:51,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:51,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 22:27:51,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:51,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1488785760, now seen corresponding path program 2 times [2023-11-23 22:27:51,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:51,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496659266] [2023-11-23 22:27:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:51,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:51,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496659266] [2023-11-23 22:27:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496659266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71759718] [2023-11-23 22:27:51,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:27:51,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:51,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:52,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:27:52,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:27:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:27:52,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:27:52,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 22:27:52,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-23 22:27:52,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71759718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:52,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:52,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-23 22:27:52,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402514119] [2023-11-23 22:27:52,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:52,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:27:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:27:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:27:52,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2023-11-23 22:27:52,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 752 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:52,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:52,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2023-11-23 22:27:52,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:54,670 INFO L124 PetriNetUnfolderBase]: 5474/10235 cut-off events. [2023-11-23 22:27:54,670 INFO L125 PetriNetUnfolderBase]: For 41036/41425 co-relation queries the response was YES. [2023-11-23 22:27:54,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37018 conditions, 10235 events. 5474/10235 cut-off events. For 41036/41425 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 71530 event pairs, 659 based on Foata normal form. 462/10684 useless extension candidates. Maximal degree in co-relation 36981. Up to 3252 conditions per place. [2023-11-23 22:27:54,945 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 342 selfloop transitions, 16 changer transitions 1/368 dead transitions. [2023-11-23 22:27:54,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 368 transitions, 3653 flow [2023-11-23 22:27:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:27:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-23 22:27:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 247 transitions. [2023-11-23 22:27:54,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.498989898989899 [2023-11-23 22:27:54,947 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 247 transitions. [2023-11-23 22:27:54,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 247 transitions. [2023-11-23 22:27:54,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:54,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 247 transitions. [2023-11-23 22:27:54,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.466666666666665) internal successors, (247), 15 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:54,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:54,952 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:54,952 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 752 flow. Second operand 15 states and 247 transitions. [2023-11-23 22:27:54,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 368 transitions, 3653 flow [2023-11-23 22:27:55,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 368 transitions, 3271 flow, removed 148 selfloop flow, removed 6 redundant places. [2023-11-23 22:27:55,057 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 710 flow [2023-11-23 22:27:55,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=710, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2023-11-23 22:27:55,058 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 69 predicate places. [2023-11-23 22:27:55,058 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 710 flow [2023-11-23 22:27:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:55,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:55,059 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:27:55,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:55,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:27:55,281 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:55,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1200384143, now seen corresponding path program 2 times [2023-11-23 22:27:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373275374] [2023-11-23 22:27:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:55,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:55,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373275374] [2023-11-23 22:27:55,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373275374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:55,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183957807] [2023-11-23 22:27:55,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:27:55,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:55,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:55,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:55,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:27:55,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-23 22:27:55,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:27:55,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 22:27:55,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 22:27:55,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:27:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 22:27:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183957807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:27:55,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:27:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-23 22:27:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759956756] [2023-11-23 22:27:55,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:27:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:27:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:27:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:27:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:27:55,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2023-11-23 22:27:55,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 710 flow. Second operand has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:55,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:27:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2023-11-23 22:27:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:27:58,666 INFO L124 PetriNetUnfolderBase]: 7150/13540 cut-off events. [2023-11-23 22:27:58,666 INFO L125 PetriNetUnfolderBase]: For 52322/53778 co-relation queries the response was YES. [2023-11-23 22:27:58,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48155 conditions, 13540 events. 7150/13540 cut-off events. For 52322/53778 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 98762 event pairs, 448 based on Foata normal form. 1006/14514 useless extension candidates. Maximal degree in co-relation 48119. Up to 2373 conditions per place. [2023-11-23 22:27:58,809 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 503 selfloop transitions, 21 changer transitions 52/586 dead transitions. [2023-11-23 22:27:58,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 586 transitions, 6154 flow [2023-11-23 22:27:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 22:27:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-23 22:27:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 252 transitions. [2023-11-23 22:27:58,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-11-23 22:27:58,812 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 252 transitions. [2023-11-23 22:27:58,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 252 transitions. [2023-11-23 22:27:58,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:27:58,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 252 transitions. [2023-11-23 22:27:58,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,815 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,816 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 710 flow. Second operand 15 states and 252 transitions. [2023-11-23 22:27:58,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 586 transitions, 6154 flow [2023-11-23 22:27:58,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 586 transitions, 5948 flow, removed 43 selfloop flow, removed 14 redundant places. [2023-11-23 22:27:58,983 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 712 flow [2023-11-23 22:27:58,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=712, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2023-11-23 22:27:58,984 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 69 predicate places. [2023-11-23 22:27:58,985 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 712 flow [2023-11-23 22:27:58,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:27:58,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:27:58,985 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2023-11-23 22:27:59,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:27:59,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 22:27:59,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:27:59,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:27:59,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1602565277, now seen corresponding path program 2 times [2023-11-23 22:27:59,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:27:59,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997192024] [2023-11-23 22:27:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:27:59,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:27:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:27:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:59,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:27:59,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997192024] [2023-11-23 22:27:59,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997192024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:27:59,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746813272] [2023-11-23 22:27:59,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:27:59,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:27:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:27:59,596 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:27:59,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:27:59,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:27:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:27:59,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 22:27:59,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:27:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:27:59,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:00,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746813272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:00,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:00,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-11-23 22:28:00,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342160674] [2023-11-23 22:28:00,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:00,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 22:28:00,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:00,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:28:00,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:28:00,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:28:00,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 712 flow. Second operand has 24 states, 24 states have (on average 14.0) internal successors, (336), 24 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:00,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:00,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:28:00,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:03,548 INFO L124 PetriNetUnfolderBase]: 8011/18733 cut-off events. [2023-11-23 22:28:03,548 INFO L125 PetriNetUnfolderBase]: For 118994/120627 co-relation queries the response was YES. [2023-11-23 22:28:03,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67619 conditions, 18733 events. 8011/18733 cut-off events. For 118994/120627 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 155549 event pairs, 417 based on Foata normal form. 590/19298 useless extension candidates. Maximal degree in co-relation 67585. Up to 3407 conditions per place. [2023-11-23 22:28:03,955 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 443 selfloop transitions, 201 changer transitions 0/662 dead transitions. [2023-11-23 22:28:03,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 662 transitions, 6138 flow [2023-11-23 22:28:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 22:28:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-23 22:28:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 520 transitions. [2023-11-23 22:28:03,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-23 22:28:03,960 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 520 transitions. [2023-11-23 22:28:03,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 520 transitions. [2023-11-23 22:28:03,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:03,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 520 transitions. [2023-11-23 22:28:03,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 21.666666666666668) internal successors, (520), 24 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,968 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:03,969 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 712 flow. Second operand 24 states and 520 transitions. [2023-11-23 22:28:03,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 662 transitions, 6138 flow [2023-11-23 22:28:04,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 662 transitions, 5293 flow, removed 117 selfloop flow, removed 15 redundant places. [2023-11-23 22:28:04,095 INFO L231 Difference]: Finished difference. Result has 129 places, 251 transitions, 2827 flow [2023-11-23 22:28:04,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2827, PETRI_PLACES=129, PETRI_TRANSITIONS=251} [2023-11-23 22:28:04,097 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 95 predicate places. [2023-11-23 22:28:04,097 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 251 transitions, 2827 flow [2023-11-23 22:28:04,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.0) internal successors, (336), 24 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:04,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:04,098 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2023-11-23 22:28:04,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:04,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:28:04,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:28:04,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:04,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2142445277, now seen corresponding path program 3 times [2023-11-23 22:28:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:04,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103358358] [2023-11-23 22:28:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:05,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103358358] [2023-11-23 22:28:05,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103358358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020135204] [2023-11-23 22:28:05,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:28:05,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:05,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:05,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:05,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:28:05,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-23 22:28:05,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:28:05,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 22:28:05,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:05,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:28:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:06,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020135204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:28:06,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:28:06,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2023-11-23 22:28:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146198866] [2023-11-23 22:28:06,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:28:06,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 22:28:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:28:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 22:28:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 22:28:06,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 33 [2023-11-23 22:28:06,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 251 transitions, 2827 flow. Second operand has 48 states, 48 states have (on average 14.0) internal successors, (672), 48 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:28:06,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 33 [2023-11-23 22:28:06,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:28:19,853 INFO L124 PetriNetUnfolderBase]: 21881/51113 cut-off events. [2023-11-23 22:28:19,853 INFO L125 PetriNetUnfolderBase]: For 813563/816871 co-relation queries the response was YES. [2023-11-23 22:28:20,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180467 conditions, 51113 events. 21881/51113 cut-off events. For 813563/816871 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 455466 event pairs, 1397 based on Foata normal form. 1514/52600 useless extension candidates. Maximal degree in co-relation 180415. Up to 8679 conditions per place. [2023-11-23 22:28:20,572 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 875 selfloop transitions, 817 changer transitions 0/1710 dead transitions. [2023-11-23 22:28:20,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1710 transitions, 17689 flow [2023-11-23 22:28:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-23 22:28:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-23 22:28:20,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1048 transitions. [2023-11-23 22:28:20,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6616161616161617 [2023-11-23 22:28:20,577 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 1048 transitions. [2023-11-23 22:28:20,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 1048 transitions. [2023-11-23 22:28:20,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:28:20,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 1048 transitions. [2023-11-23 22:28:20,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 21.833333333333332) internal successors, (1048), 48 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:20,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 33.0) internal successors, (1617), 49 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:20,585 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 33.0) internal successors, (1617), 49 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:20,585 INFO L175 Difference]: Start difference. First operand has 129 places, 251 transitions, 2827 flow. Second operand 48 states and 1048 transitions. [2023-11-23 22:28:20,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1710 transitions, 17689 flow [2023-11-23 22:28:21,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 1710 transitions, 15242 flow, removed 1204 selfloop flow, removed 4 redundant places. [2023-11-23 22:28:21,248 INFO L231 Difference]: Finished difference. Result has 217 places, 867 transitions, 11049 flow [2023-11-23 22:28:21,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=11049, PETRI_PLACES=217, PETRI_TRANSITIONS=867} [2023-11-23 22:28:21,249 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 183 predicate places. [2023-11-23 22:28:21,250 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 867 transitions, 11049 flow [2023-11-23 22:28:21,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 14.0) internal successors, (672), 48 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:28:21,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:28:21,251 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2023-11-23 22:28:21,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:28:21,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:28:21,453 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-23 22:28:21,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:28:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -327789731, now seen corresponding path program 4 times [2023-11-23 22:28:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:28:21,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132867938] [2023-11-23 22:28:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:28:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:28:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:28:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:24,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:28:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132867938] [2023-11-23 22:28:24,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132867938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:28:24,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539181067] [2023-11-23 22:28:24,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:28:24,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:28:24,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:28:24,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:28:24,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67e3798c-5925-42be-bcb7-bef6f5ca8e4f/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:28:24,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:28:24,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:28:24,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 22:28:24,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:28:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:28:25,061 INFO L327 TraceCheckSpWp]: Computing backward predicates...