./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 9bd2c7ff 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_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu --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-9bd2c7f [2023-11-19 07:59:49,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:49,886 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:59:49,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:49,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:49,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:49,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:49,919 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:49,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:49,920 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:49,921 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:49,921 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:49,922 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:49,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:49,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:49,924 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:49,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:49,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:49,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:49,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:49,926 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:49,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:49,927 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:59:49,927 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:59:49,928 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:49,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:49,929 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:49,929 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:49,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:49,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:49,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:49,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:49,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:49,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:49,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:49,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:49,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:49,933 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:49,933 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:49,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:49,934 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:49,934 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_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2023-11-19 07:59:50,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:50,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:50,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:50,286 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:50,286 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:50,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-19 07:59:53,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:53,725 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:53,726 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-19 07:59:53,734 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/data/0a5a91097/c94ddfff6c41419094eba87513eed863/FLAGfacff7b29 [2023-11-19 07:59:53,749 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/data/0a5a91097/c94ddfff6c41419094eba87513eed863 [2023-11-19 07:59:53,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:53,753 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:53,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:53,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:53,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:53,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:53" (1/1) ... [2023-11-19 07:59:53,763 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe2a08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:53, skipping insertion in model container [2023-11-19 07:59:53,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:53" (1/1) ... [2023-11-19 07:59:53,796 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:54,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:54,014 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:54,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:54,040 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:59:54,041 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:59:54,049 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:54,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54 WrapperNode [2023-11-19 07:59:54,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:54,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:54,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:54,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:54,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,088 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2023-11-19 07:59:54,088 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:54,089 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:54,089 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:54,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:54,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,101 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,107 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:54,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:54,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:54,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:54,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (1/1) ... [2023-11-19 07:59:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:54,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:54,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:54,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:59:54,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:59:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:59:54,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:59:54,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:59:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:59:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:59:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:59:54,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:54,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:59:54,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:59:54,220 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:59:54,320 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:54,321 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:54,547 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:54,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:54,644 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:59:54,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:54 BoogieIcfgContainer [2023-11-19 07:59:54,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:54,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:54,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:54,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:54,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:53" (1/3) ... [2023-11-19 07:59:54,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba3afbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:54, skipping insertion in model container [2023-11-19 07:59:54,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:54" (2/3) ... [2023-11-19 07:59:54,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba3afbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:54, skipping insertion in model container [2023-11-19 07:59:54,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:54" (3/3) ... [2023-11-19 07:59:54,667 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-19 07:59:54,677 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:59:54,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:54,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-19 07:59:54,689 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:59:54,784 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:59:54,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 92 transitions, 198 flow [2023-11-19 07:59:54,878 INFO L124 PetriNetUnfolderBase]: 5/90 cut-off events. [2023-11-19 07:59:54,878 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:59:54,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 5/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 103 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-19 07:59:54,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 92 transitions, 198 flow [2023-11-19 07:59:54,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 68 transitions, 145 flow [2023-11-19 07:59:54,894 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:59:54,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 68 transitions, 145 flow [2023-11-19 07:59:54,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 68 transitions, 145 flow [2023-11-19 07:59:54,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 145 flow [2023-11-19 07:59:54,966 INFO L124 PetriNetUnfolderBase]: 4/68 cut-off events. [2023-11-19 07:59:54,966 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:59:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 4/68 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-11-19 07:59:54,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-11-19 07:59:57,527 INFO L134 LiptonReduction]: Checked pairs total: 1198 [2023-11-19 07:59:57,528 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-11-19 07:59:57,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:57,551 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;@1d0dda79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:57,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-19 07:59:57,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:57,555 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-11-19 07:59:57,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:57,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:57,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:57,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:59:57,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash 11514289, now seen corresponding path program 1 times [2023-11-19 07:59:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:57,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785276498] [2023-11-19 07:59:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:57,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785276498] [2023-11-19 07:59:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785276498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:57,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:57,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228008345] [2023-11-19 07:59:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:57,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 07:59:57,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:57,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:57,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 07:59:57,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:57,970 INFO L124 PetriNetUnfolderBase]: 180/307 cut-off events. [2023-11-19 07:59:57,971 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-19 07:59:57,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 307 events. 180/307 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1171 event pairs, 48 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 560. Up to 253 conditions per place. [2023-11-19 07:59:57,977 INFO L140 encePairwiseOnDemand]: 141/152 looper letters, 24 selfloop transitions, 4 changer transitions 3/31 dead transitions. [2023-11-19 07:59:57,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 139 flow [2023-11-19 07:59:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-19 07:59:57,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2023-11-19 07:59:57,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-19 07:59:57,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-19 07:59:57,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:57,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-19 07:59:58,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,008 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 270 transitions. [2023-11-19 07:59:58,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 139 flow [2023-11-19 07:59:58,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 07:59:58,014 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 80 flow [2023-11-19 07:59:58,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-19 07:59:58,019 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-19 07:59:58,020 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 80 flow [2023-11-19 07:59:58,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:58,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:58,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:59:58,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:59:58,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 356944590, now seen corresponding path program 1 times [2023-11-19 07:59:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:58,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658071934] [2023-11-19 07:59:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658071934] [2023-11-19 07:59:58,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658071934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:58,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:58,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432367005] [2023-11-19 07:59:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:58,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:58,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 152 [2023-11-19 07:59:58,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:58,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 152 [2023-11-19 07:59:58,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:58,232 INFO L124 PetriNetUnfolderBase]: 152/265 cut-off events. [2023-11-19 07:59:58,232 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:59:58,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 265 events. 152/265 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1012 event pairs, 43 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 462. Up to 169 conditions per place. [2023-11-19 07:59:58,236 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 28 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-11-19 07:59:58,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 159 flow [2023-11-19 07:59:58,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2023-11-19 07:59:58,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2023-11-19 07:59:58,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2023-11-19 07:59:58,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2023-11-19 07:59:58,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:58,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2023-11-19 07:59:58,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,246 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 80 flow. Second operand 3 states and 254 transitions. [2023-11-19 07:59:58,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 159 flow [2023-11-19 07:59:58,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:58,248 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 72 flow [2023-11-19 07:59:58,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-19 07:59:58,250 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-19 07:59:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 72 flow [2023-11-19 07:59:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:58,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:59:58,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:59:58,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash 356944602, now seen corresponding path program 1 times [2023-11-19 07:59:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:58,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475608682] [2023-11-19 07:59:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:58,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475608682] [2023-11-19 07:59:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475608682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:58,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982895473] [2023-11-19 07:59:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:58,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:58,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:58,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:58,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:58,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:58,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:58,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:58,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:58,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982895473] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:58,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:59:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926389522] [2023-11-19 07:59:58,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:58,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:59:58,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:58,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:59:58,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:59:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 152 [2023-11-19 07:59:58,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:58,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 152 [2023-11-19 07:59:58,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:58,827 INFO L124 PetriNetUnfolderBase]: 366/605 cut-off events. [2023-11-19 07:59:58,828 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-19 07:59:58,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1632 conditions, 605 events. 366/605 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2690 event pairs, 91 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 1042. Up to 311 conditions per place. [2023-11-19 07:59:58,838 INFO L140 encePairwiseOnDemand]: 148/152 looper letters, 56 selfloop transitions, 8 changer transitions 1/65 dead transitions. [2023-11-19 07:59:58,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 65 transitions, 346 flow [2023-11-19 07:59:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:59:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:59:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 519 transitions. [2023-11-19 07:59:58,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569078947368421 [2023-11-19 07:59:58,842 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 519 transitions. [2023-11-19 07:59:58,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 519 transitions. [2023-11-19 07:59:58,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:58,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 519 transitions. [2023-11-19 07:59:58,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.5) internal successors, (519), 6 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,849 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 152.0) internal successors, (1064), 7 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,849 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 72 flow. Second operand 6 states and 519 transitions. [2023-11-19 07:59:58,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 65 transitions, 346 flow [2023-11-19 07:59:58,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 65 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:59:58,854 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 117 flow [2023-11-19 07:59:58,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-19 07:59:58,855 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-11-19 07:59:58,855 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 117 flow [2023-11-19 07:59:58,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:58,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:58,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:59,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:59,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:59:59,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash 356944561, now seen corresponding path program 1 times [2023-11-19 07:59:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:59,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947130295] [2023-11-19 07:59:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:59,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947130295] [2023-11-19 07:59:59,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947130295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:59,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250792089] [2023-11-19 07:59:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:59,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:59,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:59,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:59,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:59,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250792089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:59,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:59,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-19 07:59:59,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103582518] [2023-11-19 07:59:59,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:59,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:59:59,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:59:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:59:59,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 07:59:59,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:59,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 07:59:59,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:59,522 INFO L124 PetriNetUnfolderBase]: 546/903 cut-off events. [2023-11-19 07:59:59,522 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2023-11-19 07:59:59,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 903 events. 546/903 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3927 event pairs, 51 based on Foata normal form. 54/841 useless extension candidates. Maximal degree in co-relation 2584. Up to 437 conditions per place. [2023-11-19 07:59:59,532 INFO L140 encePairwiseOnDemand]: 143/152 looper letters, 66 selfloop transitions, 29 changer transitions 0/95 dead transitions. [2023-11-19 07:59:59,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 95 transitions, 590 flow [2023-11-19 07:59:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:59:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:59:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2023-11-19 07:59:59,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930451127819549 [2023-11-19 07:59:59,536 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2023-11-19 07:59:59,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2023-11-19 07:59:59,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:59,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2023-11-19 07:59:59,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 90.14285714285714) internal successors, (631), 7 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,543 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,543 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 117 flow. Second operand 7 states and 631 transitions. [2023-11-19 07:59:59,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 95 transitions, 590 flow [2023-11-19 07:59:59,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 95 transitions, 586 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:59,549 INFO L231 Difference]: Finished difference. Result has 41 places, 49 transitions, 415 flow [2023-11-19 07:59:59,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=415, PETRI_PLACES=41, PETRI_TRANSITIONS=49} [2023-11-19 07:59:59,550 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-11-19 07:59:59,550 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 49 transitions, 415 flow [2023-11-19 07:59:59,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:59,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:59,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:59,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:59,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 07:59:59,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 356944560, now seen corresponding path program 1 times [2023-11-19 07:59:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937214908] [2023-11-19 07:59:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:59,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937214908] [2023-11-19 07:59:59,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937214908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:59,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667646530] [2023-11-19 07:59:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:59,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:59,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:59,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:59,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:59,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:59,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:59,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:59:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667646530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:59,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:59:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-19 07:59:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755739895] [2023-11-19 07:59:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:59,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:59:59,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:59:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:59:59,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 07:59:59,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 49 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:59,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:59,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 07:59:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:00,146 INFO L124 PetriNetUnfolderBase]: 599/994 cut-off events. [2023-11-19 08:00:00,147 INFO L125 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2023-11-19 08:00:00,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4447 conditions, 994 events. 599/994 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4485 event pairs, 79 based on Foata normal form. 122/980 useless extension candidates. Maximal degree in co-relation 4198. Up to 578 conditions per place. [2023-11-19 08:00:00,160 INFO L140 encePairwiseOnDemand]: 143/152 looper letters, 43 selfloop transitions, 24 changer transitions 0/67 dead transitions. [2023-11-19 08:00:00,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 683 flow [2023-11-19 08:00:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:00:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:00:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2023-11-19 08:00:00,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641447368421053 [2023-11-19 08:00:00,163 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2023-11-19 08:00:00,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2023-11-19 08:00:00,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:00,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2023-11-19 08:00:00,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,167 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,168 INFO L175 Difference]: Start difference. First operand has 41 places, 49 transitions, 415 flow. Second operand 4 states and 343 transitions. [2023-11-19 08:00:00,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 683 flow [2023-11-19 08:00:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 67 transitions, 597 flow, removed 43 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:00,181 INFO L231 Difference]: Finished difference. Result has 43 places, 56 transitions, 544 flow [2023-11-19 08:00:00,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=544, PETRI_PLACES=43, PETRI_TRANSITIONS=56} [2023-11-19 08:00:00,183 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-11-19 08:00:00,183 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 56 transitions, 544 flow [2023-11-19 08:00:00,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:00,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:00,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:00,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:00,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:00,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:00,405 INFO L85 PathProgramCache]: Analyzing trace with hash -24794595, now seen corresponding path program 1 times [2023-11-19 08:00:00,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:00,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643861289] [2023-11-19 08:00:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643861289] [2023-11-19 08:00:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643861289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:00,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:00,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839964780] [2023-11-19 08:00:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:00,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:00,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 152 [2023-11-19 08:00:00,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 56 transitions, 544 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:00,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 152 [2023-11-19 08:00:00,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:00,706 INFO L124 PetriNetUnfolderBase]: 639/1056 cut-off events. [2023-11-19 08:00:00,706 INFO L125 PetriNetUnfolderBase]: For 2862/2862 co-relation queries the response was YES. [2023-11-19 08:00:00,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4876 conditions, 1056 events. 639/1056 cut-off events. For 2862/2862 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4841 event pairs, 267 based on Foata normal form. 0/928 useless extension candidates. Maximal degree in co-relation 4628. Up to 957 conditions per place. [2023-11-19 08:00:00,721 INFO L140 encePairwiseOnDemand]: 147/152 looper letters, 69 selfloop transitions, 5 changer transitions 2/76 dead transitions. [2023-11-19 08:00:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 846 flow [2023-11-19 08:00:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-11-19 08:00:00,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-11-19 08:00:00,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-11-19 08:00:00,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-11-19 08:00:00,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:00,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-11-19 08:00:00,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,726 INFO L175 Difference]: Start difference. First operand has 43 places, 56 transitions, 544 flow. Second operand 3 states and 256 transitions. [2023-11-19 08:00:00,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 846 flow [2023-11-19 08:00:00,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 76 transitions, 773 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:00,744 INFO L231 Difference]: Finished difference. Result has 45 places, 59 transitions, 551 flow [2023-11-19 08:00:00,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=551, PETRI_PLACES=45, PETRI_TRANSITIONS=59} [2023-11-19 08:00:00,750 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-11-19 08:00:00,750 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 59 transitions, 551 flow [2023-11-19 08:00:00,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:00,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:00,751 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 08:00:00,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:00:00,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:00,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash -602017359, now seen corresponding path program 2 times [2023-11-19 08:00:00,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:00,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309602866] [2023-11-19 08:00:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:00,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309602866] [2023-11-19 08:00:00,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309602866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:00,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944401331] [2023-11-19 08:00:00,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:00,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:00,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:00,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:00,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 08:00:00,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:00,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:00:00,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:01,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944401331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:01,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-19 08:00:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809600258] [2023-11-19 08:00:01,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:00:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:00:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:00:01,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 08:00:01,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 59 transitions, 551 flow. Second operand has 13 states, 13 states have (on average 78.53846153846153) internal successors, (1021), 13 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:01,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 08:00:01,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:01,896 INFO L124 PetriNetUnfolderBase]: 1758/2985 cut-off events. [2023-11-19 08:00:01,896 INFO L125 PetriNetUnfolderBase]: For 8245/8245 co-relation queries the response was YES. [2023-11-19 08:00:01,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12915 conditions, 2985 events. 1758/2985 cut-off events. For 8245/8245 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17340 event pairs, 127 based on Foata normal form. 374/2919 useless extension candidates. Maximal degree in co-relation 12438. Up to 795 conditions per place. [2023-11-19 08:00:01,935 INFO L140 encePairwiseOnDemand]: 144/152 looper letters, 130 selfloop transitions, 132 changer transitions 0/262 dead transitions. [2023-11-19 08:00:01,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 262 transitions, 2507 flow [2023-11-19 08:00:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:00:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:00:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1092 transitions. [2023-11-19 08:00:01,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986842105263158 [2023-11-19 08:00:01,941 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1092 transitions. [2023-11-19 08:00:01,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1092 transitions. [2023-11-19 08:00:01,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:01,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1092 transitions. [2023-11-19 08:00:01,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,951 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,951 INFO L175 Difference]: Start difference. First operand has 45 places, 59 transitions, 551 flow. Second operand 12 states and 1092 transitions. [2023-11-19 08:00:01,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 262 transitions, 2507 flow [2023-11-19 08:00:01,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 262 transitions, 2475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:01,983 INFO L231 Difference]: Finished difference. Result has 65 places, 167 transitions, 2265 flow [2023-11-19 08:00:01,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2265, PETRI_PLACES=65, PETRI_TRANSITIONS=167} [2023-11-19 08:00:01,984 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2023-11-19 08:00:01,985 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 167 transitions, 2265 flow [2023-11-19 08:00:01,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.53846153846153) internal successors, (1021), 13 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:01,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:01,987 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-11-19 08:00:02,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:02,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:02,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:02,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash -602017318, now seen corresponding path program 2 times [2023-11-19 08:00:02,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:02,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928998445] [2023-11-19 08:00:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:02,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928998445] [2023-11-19 08:00:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928998445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524194593] [2023-11-19 08:00:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 08:00:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:02,301 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:02,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:02,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 08:00:02,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:02,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:00:02,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 08:00:02,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:02,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524194593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:02,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:00:02,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-11-19 08:00:02,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722369045] [2023-11-19 08:00:02,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:02,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:02,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:00:02,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 152 [2023-11-19 08:00:02,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 167 transitions, 2265 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:02,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 152 [2023-11-19 08:00:02,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:02,829 INFO L124 PetriNetUnfolderBase]: 1117/1894 cut-off events. [2023-11-19 08:00:02,829 INFO L125 PetriNetUnfolderBase]: For 9710/9710 co-relation queries the response was YES. [2023-11-19 08:00:02,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9478 conditions, 1894 events. 1117/1894 cut-off events. For 9710/9710 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9650 event pairs, 641 based on Foata normal form. 214/1938 useless extension candidates. Maximal degree in co-relation 9024. Up to 1894 conditions per place. [2023-11-19 08:00:02,852 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 116 selfloop transitions, 1 changer transitions 0/117 dead transitions. [2023-11-19 08:00:02,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 117 transitions, 1819 flow [2023-11-19 08:00:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-11-19 08:00:02,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5394736842105263 [2023-11-19 08:00:02,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-11-19 08:00:02,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-11-19 08:00:02,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:02,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-11-19 08:00:02,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,857 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,859 INFO L175 Difference]: Start difference. First operand has 65 places, 167 transitions, 2265 flow. Second operand 3 states and 246 transitions. [2023-11-19 08:00:02,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 117 transitions, 1819 flow [2023-11-19 08:00:02,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 117 transitions, 1603 flow, removed 95 selfloop flow, removed 3 redundant places. [2023-11-19 08:00:02,908 INFO L231 Difference]: Finished difference. Result has 62 places, 117 transitions, 1371 flow [2023-11-19 08:00:02,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1371, PETRI_PLACES=62, PETRI_TRANSITIONS=117} [2023-11-19 08:00:02,911 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2023-11-19 08:00:02,911 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 117 transitions, 1371 flow [2023-11-19 08:00:02,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:02,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:02,913 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:02,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:03,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:03,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:03,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1159636063, now seen corresponding path program 1 times [2023-11-19 08:00:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237383582] [2023-11-19 08:00:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237383582] [2023-11-19 08:00:03,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237383582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:03,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:03,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:03,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051687141] [2023-11-19 08:00:03,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:03,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:03,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:03,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 152 [2023-11-19 08:00:03,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 117 transitions, 1371 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:03,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:03,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 152 [2023-11-19 08:00:03,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:03,443 INFO L124 PetriNetUnfolderBase]: 868/1459 cut-off events. [2023-11-19 08:00:03,443 INFO L125 PetriNetUnfolderBase]: For 6780/6780 co-relation queries the response was YES. [2023-11-19 08:00:03,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6415 conditions, 1459 events. 868/1459 cut-off events. For 6780/6780 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7033 event pairs, 251 based on Foata normal form. 0/1459 useless extension candidates. Maximal degree in co-relation 6385. Up to 747 conditions per place. [2023-11-19 08:00:03,461 INFO L140 encePairwiseOnDemand]: 149/152 looper letters, 142 selfloop transitions, 3 changer transitions 4/149 dead transitions. [2023-11-19 08:00:03,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 149 transitions, 2052 flow [2023-11-19 08:00:03,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-11-19 08:00:03,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2023-11-19 08:00:03,463 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-11-19 08:00:03,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-11-19 08:00:03,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:03,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-11-19 08:00:03,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:03,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:03,466 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:03,466 INFO L175 Difference]: Start difference. First operand has 62 places, 117 transitions, 1371 flow. Second operand 3 states and 248 transitions. [2023-11-19 08:00:03,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 149 transitions, 2052 flow [2023-11-19 08:00:03,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 149 transitions, 2031 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-19 08:00:03,496 INFO L231 Difference]: Finished difference. Result has 62 places, 93 transitions, 1102 flow [2023-11-19 08:00:03,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1102, PETRI_PLACES=62, PETRI_TRANSITIONS=93} [2023-11-19 08:00:03,497 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2023-11-19 08:00:03,498 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 93 transitions, 1102 flow [2023-11-19 08:00:03,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:03,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:03,498 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-11-19 08:00:03,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:00:03,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:03,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash -332967503, now seen corresponding path program 3 times [2023-11-19 08:00:03,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:03,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46378824] [2023-11-19 08:00:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:03,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:03,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46378824] [2023-11-19 08:00:03,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46378824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:03,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648305988] [2023-11-19 08:00:03,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 08:00:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:03,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:03,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:00:03,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 08:00:03,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:03,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:00:03,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:03,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:04,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648305988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:04,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:04,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-19 08:00:04,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951345305] [2023-11-19 08:00:04,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:04,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 08:00:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 08:00:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:00:04,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 08:00:04,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 93 transitions, 1102 flow. Second operand has 25 states, 25 states have (on average 78.28) internal successors, (1957), 25 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:04,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:04,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 08:00:04,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:05,174 INFO L124 PetriNetUnfolderBase]: 2380/4115 cut-off events. [2023-11-19 08:00:05,174 INFO L125 PetriNetUnfolderBase]: For 57590/57590 co-relation queries the response was YES. [2023-11-19 08:00:05,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17711 conditions, 4115 events. 2380/4115 cut-off events. For 57590/57590 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 22866 event pairs, 185 based on Foata normal form. 566/4681 useless extension candidates. Maximal degree in co-relation 17681. Up to 1281 conditions per place. [2023-11-19 08:00:05,210 INFO L140 encePairwiseOnDemand]: 147/152 looper letters, 155 selfloop transitions, 242 changer transitions 66/463 dead transitions. [2023-11-19 08:00:05,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 463 transitions, 4667 flow [2023-11-19 08:00:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:00:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 08:00:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2127 transitions. [2023-11-19 08:00:05,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830592105263158 [2023-11-19 08:00:05,219 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2127 transitions. [2023-11-19 08:00:05,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2127 transitions. [2023-11-19 08:00:05,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:05,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2127 transitions. [2023-11-19 08:00:05,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.625) internal successors, (2127), 24 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,237 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,237 INFO L175 Difference]: Start difference. First operand has 62 places, 93 transitions, 1102 flow. Second operand 24 states and 2127 transitions. [2023-11-19 08:00:05,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 463 transitions, 4667 flow [2023-11-19 08:00:05,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 463 transitions, 4529 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:05,313 INFO L231 Difference]: Finished difference. Result has 105 places, 265 transitions, 4111 flow [2023-11-19 08:00:05,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4111, PETRI_PLACES=105, PETRI_TRANSITIONS=265} [2023-11-19 08:00:05,314 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 79 predicate places. [2023-11-19 08:00:05,314 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 265 transitions, 4111 flow [2023-11-19 08:00:05,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 78.28) internal successors, (1957), 25 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:05,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:05,315 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2023-11-19 08:00:05,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:00:05,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -727576143, now seen corresponding path program 4 times [2023-11-19 08:00:05,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:05,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603552262] [2023-11-19 08:00:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:05,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:06,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:06,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603552262] [2023-11-19 08:00:06,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603552262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:06,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815612925] [2023-11-19 08:00:06,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 08:00:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:06,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:06,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:00:06,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 08:00:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:06,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 08:00:06,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:06,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:07,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815612925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:07,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:07,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-19 08:00:07,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719881784] [2023-11-19 08:00:07,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:07,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 08:00:07,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 08:00:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 08:00:07,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 08:00:07,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 265 transitions, 4111 flow. Second operand has 49 states, 49 states have (on average 78.14285714285714) internal successors, (3829), 49 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:07,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:07,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 08:00:07,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:12,080 INFO L124 PetriNetUnfolderBase]: 7936/13763 cut-off events. [2023-11-19 08:00:12,081 INFO L125 PetriNetUnfolderBase]: For 725348/725348 co-relation queries the response was YES. [2023-11-19 08:00:12,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64294 conditions, 13763 events. 7936/13763 cut-off events. For 725348/725348 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 87162 event pairs, 753 based on Foata normal form. 1190/14953 useless extension candidates. Maximal degree in co-relation 64241. Up to 4353 conditions per place. [2023-11-19 08:00:12,280 INFO L140 encePairwiseOnDemand]: 147/152 looper letters, 299 selfloop transitions, 882 changer transitions 138/1319 dead transitions. [2023-11-19 08:00:12,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1319 transitions, 17324 flow [2023-11-19 08:00:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 08:00:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-19 08:00:12,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4263 transitions. [2023-11-19 08:00:12,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842927631578947 [2023-11-19 08:00:12,299 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4263 transitions. [2023-11-19 08:00:12,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4263 transitions. [2023-11-19 08:00:12,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:12,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4263 transitions. [2023-11-19 08:00:12,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 88.8125) internal successors, (4263), 48 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 152.0) internal successors, (7448), 49 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,335 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 152.0) internal successors, (7448), 49 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,336 INFO L175 Difference]: Start difference. First operand has 105 places, 265 transitions, 4111 flow. Second operand 48 states and 4263 transitions. [2023-11-19 08:00:12,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1319 transitions, 17324 flow [2023-11-19 08:00:12,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 1319 transitions, 14432 flow, removed 1397 selfloop flow, removed 5 redundant places. [2023-11-19 08:00:12,764 INFO L231 Difference]: Finished difference. Result has 193 places, 905 transitions, 14358 flow [2023-11-19 08:00:12,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=14358, PETRI_PLACES=193, PETRI_TRANSITIONS=905} [2023-11-19 08:00:12,765 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 167 predicate places. [2023-11-19 08:00:12,765 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 905 transitions, 14358 flow [2023-11-19 08:00:12,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 78.14285714285714) internal successors, (3829), 49 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:12,767 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2023-11-19 08:00:12,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:12,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:12,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-11-19 08:00:12,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash -281570895, now seen corresponding path program 5 times [2023-11-19 08:00:12,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:12,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605306414] [2023-11-19 08:00:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:12,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:15,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:15,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605306414] [2023-11-19 08:00:15,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605306414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:00:15,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742913530] [2023-11-19 08:00:15,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 08:00:15,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:15,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:15,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:15,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7210f6e5-8a1c-42ce-b069-b4542ea9a37f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:00:15,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-19 08:00:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 08:00:15,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 08:00:15,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:15,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742913530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:19,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:00:19,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2023-11-19 08:00:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112335295] [2023-11-19 08:00:19,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:19,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-19 08:00:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-19 08:00:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-19 08:00:19,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 152 [2023-11-19 08:00:19,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 905 transitions, 14358 flow. Second operand has 97 states, 97 states have (on average 78.0721649484536) internal successors, (7573), 97 states have internal predecessors, (7573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:19,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 152 [2023-11-19 08:00:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand