./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f 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_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --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 ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:52:28,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:52:28,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:52:28,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:52:28,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:52:28,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:52:28,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:52:28,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:52:28,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:52:28,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:52:28,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:52:28,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:52:28,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:52:28,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:52:28,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:52:28,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:52:28,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:52:28,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:52:28,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:52:28,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:52:28,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:52:28,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:52:28,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:52:28,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:52:28,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:52:28,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:52:28,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:52:28,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:52:28,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:52:28,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:52:28,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:52:28,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:52:28,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:52:28,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:52:28,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:52:28,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:52:28,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:52:28,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:52:28,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:52:28,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:52:28,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:52:28,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:52:28,148 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:52:28,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:52:28,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:52:28,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:52:28,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:52:28,152 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:52:28,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:52:28,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:52:28,153 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:52:28,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:52:28,155 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:52:28,155 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:52:28,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:52:28,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:52:28,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:52:28,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:52:28,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:52:28,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:52:28,157 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:52:28,157 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:52:28,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:52:28,158 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:52:28,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:52:28,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:52:28,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:52:28,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:52:28,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:28,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:52:28,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:52:28,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:52:28,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:52:28,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:52:28,161 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:52:28,161 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:52:28,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:52:28,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-11-16 12:52:28,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:52:28,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:52:28,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:52:28,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:52:28,557 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:52:28,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-16 12:52:28,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/data/40aa40bd2/172f96819be643538778459f602d0bcc/FLAG456c9e93d [2022-11-16 12:52:29,115 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:52:29,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-16 12:52:29,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/data/40aa40bd2/172f96819be643538778459f602d0bcc/FLAG456c9e93d [2022-11-16 12:52:29,516 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/data/40aa40bd2/172f96819be643538778459f602d0bcc [2022-11-16 12:52:29,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:52:29,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:52:29,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:29,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:52:29,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:52:29,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:29,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710e745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29, skipping insertion in model container [2022-11-16 12:52:29,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:29,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:52:29,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:52:29,848 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-11-16 12:52:29,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:29,857 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:52:29,898 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-11-16 12:52:29,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:52:29,928 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:52:29,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29 WrapperNode [2022-11-16 12:52:29,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:52:29,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:29,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:52:29,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:52:29,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:29,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:29,984 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2022-11-16 12:52:29,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:52:29,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:52:29,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:52:29,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:52:30,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:52:30,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:52:30,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:52:30,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:52:30,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (1/1) ... [2022-11-16 12:52:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:52:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:30,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:52:30,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:52:30,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:52:30,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:52:30,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:52:30,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:52:30,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:52:30,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:52:30,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:52:30,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 12:52:30,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 12:52:30,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:52:30,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:52:30,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:52:30,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:52:30,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:52:30,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:52:30,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:52:30,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:52:30,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:52:30,141 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:52:30,246 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:52:30,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:52:30,558 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:52:30,798 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:52:30,798 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:52:30,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:30 BoogieIcfgContainer [2022-11-16 12:52:30,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:52:30,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:52:30,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:52:30,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:52:30,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:52:29" (1/3) ... [2022-11-16 12:52:30,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4616b7b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:30, skipping insertion in model container [2022-11-16 12:52:30,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:52:29" (2/3) ... [2022-11-16 12:52:30,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4616b7b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:52:30, skipping insertion in model container [2022-11-16 12:52:30,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:52:30" (3/3) ... [2022-11-16 12:52:30,811 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-16 12:52:30,820 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:52:30,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:52:30,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-16 12:52:30,832 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:52:30,932 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:52:30,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 146 transitions, 324 flow [2022-11-16 12:52:31,131 INFO L130 PetriNetUnfolder]: 10/142 cut-off events. [2022-11-16 12:52:31,131 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:52:31,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 142 events. 10/142 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-11-16 12:52:31,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 146 transitions, 324 flow [2022-11-16 12:52:31,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 119 transitions, 259 flow [2022-11-16 12:52:31,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:52:31,162 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=LoopsAndPotentialCycles, 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;@79e057bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:52:31,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-16 12:52:31,190 INFO L130 PetriNetUnfolder]: 3/55 cut-off events. [2022-11-16 12:52:31,190 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:52:31,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:31,191 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:31,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1875315823, now seen corresponding path program 1 times [2022-11-16 12:52:31,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866035481] [2022-11-16 12:52:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:31,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:31,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:31,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866035481] [2022-11-16 12:52:31,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866035481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:31,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:31,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:31,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058503062] [2022-11-16 12:52:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:31,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:31,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:31,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-16 12:52:31,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:31,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:31,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-16 12:52:31,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:32,533 INFO L130 PetriNetUnfolder]: 1853/2598 cut-off events. [2022-11-16 12:52:32,534 INFO L131 PetriNetUnfolder]: For 450/460 co-relation queries the response was YES. [2022-11-16 12:52:32,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 2598 events. 1853/2598 cut-off events. For 450/460 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 11071 event pairs, 813 based on Foata normal form. 527/1302 useless extension candidates. Maximal degree in co-relation 5172. Up to 2483 conditions per place. [2022-11-16 12:52:32,574 INFO L137 encePairwiseOnDemand]: 120/146 looper letters, 30 selfloop transitions, 7 changer transitions 2/124 dead transitions. [2022-11-16 12:52:32,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 124 transitions, 363 flow [2022-11-16 12:52:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-11-16 12:52:32,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8904109589041096 [2022-11-16 12:52:32,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-11-16 12:52:32,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-11-16 12:52:32,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:32,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-11-16 12:52:32,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,623 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 259 flow. Second operand 3 states and 390 transitions. [2022-11-16 12:52:32,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 124 transitions, 363 flow [2022-11-16 12:52:32,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 124 transitions, 339 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 12:52:32,637 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 299 flow [2022-11-16 12:52:32,639 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2022-11-16 12:52:32,644 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2022-11-16 12:52:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 299 flow [2022-11-16 12:52:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:32,646 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:52:32,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:32,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1875315821, now seen corresponding path program 1 times [2022-11-16 12:52:32,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:32,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199093049] [2022-11-16 12:52:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:32,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:32,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199093049] [2022-11-16 12:52:32,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199093049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:32,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:52:32,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:52:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680954281] [2022-11-16 12:52:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:32,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:52:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:52:32,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:52:32,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-16 12:52:32,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:32,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:32,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-16 12:52:32,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:34,147 INFO L130 PetriNetUnfolder]: 4265/5926 cut-off events. [2022-11-16 12:52:34,147 INFO L131 PetriNetUnfolder]: For 292/360 co-relation queries the response was YES. [2022-11-16 12:52:34,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17020 conditions, 5926 events. 4265/5926 cut-off events. For 292/360 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 31105 event pairs, 2898 based on Foata normal form. 0/1812 useless extension candidates. Maximal degree in co-relation 9766. Up to 4810 conditions per place. [2022-11-16 12:52:34,228 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 53 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-11-16 12:52:34,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 139 transitions, 488 flow [2022-11-16 12:52:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:52:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:52:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2022-11-16 12:52:34,230 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.863013698630137 [2022-11-16 12:52:34,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2022-11-16 12:52:34,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2022-11-16 12:52:34,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:34,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2022-11-16 12:52:34,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,236 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 299 flow. Second operand 3 states and 378 transitions. [2022-11-16 12:52:34,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 139 transitions, 488 flow [2022-11-16 12:52:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 139 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:34,252 INFO L231 Difference]: Finished difference. Result has 118 places, 116 transitions, 303 flow [2022-11-16 12:52:34,253 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2022-11-16 12:52:34,254 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2022-11-16 12:52:34,254 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 303 flow [2022-11-16 12:52:34,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:34,255 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:52:34,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:34,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777113, now seen corresponding path program 1 times [2022-11-16 12:52:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:34,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724290707] [2022-11-16 12:52:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:34,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:34,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724290707] [2022-11-16 12:52:34,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724290707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140857523] [2022-11-16 12:52:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:34,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:34,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:52:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:34,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:34,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:34,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140857523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:34,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:34,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:52:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99668860] [2022-11-16 12:52:34,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:34,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:34,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:34,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-16 12:52:34,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:34,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:34,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-16 12:52:34,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:37,326 INFO L130 PetriNetUnfolder]: 10067/14831 cut-off events. [2022-11-16 12:52:37,327 INFO L131 PetriNetUnfolder]: For 1695/1716 co-relation queries the response was YES. [2022-11-16 12:52:37,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41788 conditions, 14831 events. 10067/14831 cut-off events. For 1695/1716 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 96746 event pairs, 2429 based on Foata normal form. 1/6127 useless extension candidates. Maximal degree in co-relation 32517. Up to 11182 conditions per place. [2022-11-16 12:52:37,554 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 137 selfloop transitions, 10 changer transitions 0/230 dead transitions. [2022-11-16 12:52:37,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 230 transitions, 1027 flow [2022-11-16 12:52:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-11-16 12:52:37,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825831702544031 [2022-11-16 12:52:37,558 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-11-16 12:52:37,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-11-16 12:52:37,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:37,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-11-16 12:52:37,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:37,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:37,566 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:37,566 INFO L175 Difference]: Start difference. First operand has 118 places, 116 transitions, 303 flow. Second operand 7 states and 902 transitions. [2022-11-16 12:52:37,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 230 transitions, 1027 flow [2022-11-16 12:52:37,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 230 transitions, 1024 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:37,573 INFO L231 Difference]: Finished difference. Result has 126 places, 122 transitions, 374 flow [2022-11-16 12:52:37,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=374, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2022-11-16 12:52:37,576 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 3 predicate places. [2022-11-16 12:52:37,577 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 374 flow [2022-11-16 12:52:37,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:37,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:37,578 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:37,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:37,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:37,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777111, now seen corresponding path program 1 times [2022-11-16 12:52:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371554495] [2022-11-16 12:52:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:37,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371554495] [2022-11-16 12:52:37,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371554495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:37,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696524190] [2022-11-16 12:52:37,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:37,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:37,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:37,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:52:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:38,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:38,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:38,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:38,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696524190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:38,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:52:38,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248626489] [2022-11-16 12:52:38,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:52:38,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:52:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:52:38,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-16 12:52:38,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 374 flow. Second operand has 7 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:38,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:38,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-16 12:52:38,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:42,257 INFO L130 PetriNetUnfolder]: 14963/27591 cut-off events. [2022-11-16 12:52:42,258 INFO L131 PetriNetUnfolder]: For 17864/17974 co-relation queries the response was YES. [2022-11-16 12:52:42,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78814 conditions, 27591 events. 14963/27591 cut-off events. For 17864/17974 co-relation queries the response was YES. Maximal size of possible extension queue 2093. Compared 264977 event pairs, 1992 based on Foata normal form. 1169/16010 useless extension candidates. Maximal degree in co-relation 39668. Up to 18739 conditions per place. [2022-11-16 12:52:42,569 INFO L137 encePairwiseOnDemand]: 127/146 looper letters, 67 selfloop transitions, 90 changer transitions 0/242 dead transitions. [2022-11-16 12:52:42,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 242 transitions, 1409 flow [2022-11-16 12:52:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:52:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:52:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 908 transitions. [2022-11-16 12:52:42,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8884540117416829 [2022-11-16 12:52:42,574 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 908 transitions. [2022-11-16 12:52:42,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 908 transitions. [2022-11-16 12:52:42,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:42,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 908 transitions. [2022-11-16 12:52:42,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.71428571428572) internal successors, (908), 7 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:42,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:42,583 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:42,584 INFO L175 Difference]: Start difference. First operand has 126 places, 122 transitions, 374 flow. Second operand 7 states and 908 transitions. [2022-11-16 12:52:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 242 transitions, 1409 flow [2022-11-16 12:52:42,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 242 transitions, 1329 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-11-16 12:52:42,625 INFO L231 Difference]: Finished difference. Result has 136 places, 207 transitions, 1361 flow [2022-11-16 12:52:42,626 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1361, PETRI_PLACES=136, PETRI_TRANSITIONS=207} [2022-11-16 12:52:42,628 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 13 predicate places. [2022-11-16 12:52:42,628 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 207 transitions, 1361 flow [2022-11-16 12:52:42,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:42,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:42,630 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:42,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:42,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777114, now seen corresponding path program 1 times [2022-11-16 12:52:42,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:42,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134467724] [2022-11-16 12:52:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134467724] [2022-11-16 12:52:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134467724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572470798] [2022-11-16 12:52:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:43,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:43,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:43,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:43,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:52:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:43,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:43,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572470798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:43,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:43,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-16 12:52:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401124174] [2022-11-16 12:52:43,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:43,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-16 12:52:43,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 207 transitions, 1361 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:43,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:43,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-16 12:52:43,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:48,833 INFO L130 PetriNetUnfolder]: 20716/35414 cut-off events. [2022-11-16 12:52:48,834 INFO L131 PetriNetUnfolder]: For 47411/47846 co-relation queries the response was YES. [2022-11-16 12:52:48,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157942 conditions, 35414 events. 20716/35414 cut-off events. For 47411/47846 co-relation queries the response was YES. Maximal size of possible extension queue 2436. Compared 322254 event pairs, 9122 based on Foata normal form. 605/22245 useless extension candidates. Maximal degree in co-relation 114248. Up to 24967 conditions per place. [2022-11-16 12:52:49,176 INFO L137 encePairwiseOnDemand]: 143/146 looper letters, 150 selfloop transitions, 8 changer transitions 0/241 dead transitions. [2022-11-16 12:52:49,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 1875 flow [2022-11-16 12:52:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2022-11-16 12:52:49,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8287671232876712 [2022-11-16 12:52:49,179 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2022-11-16 12:52:49,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2022-11-16 12:52:49,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:49,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2022-11-16 12:52:49,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:49,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:49,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:49,184 INFO L175 Difference]: Start difference. First operand has 136 places, 207 transitions, 1361 flow. Second operand 4 states and 484 transitions. [2022-11-16 12:52:49,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 1875 flow [2022-11-16 12:52:50,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 241 transitions, 1731 flow, removed 72 selfloop flow, removed 0 redundant places. [2022-11-16 12:52:50,178 INFO L231 Difference]: Finished difference. Result has 137 places, 183 transitions, 1029 flow [2022-11-16 12:52:50,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1029, PETRI_PLACES=137, PETRI_TRANSITIONS=183} [2022-11-16 12:52:50,179 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 14 predicate places. [2022-11-16 12:52:50,179 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 183 transitions, 1029 flow [2022-11-16 12:52:50,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:50,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:50,180 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:50,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:52:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:50,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:50,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777112, now seen corresponding path program 1 times [2022-11-16 12:52:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:50,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908982174] [2022-11-16 12:52:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:50,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:50,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908982174] [2022-11-16 12:52:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908982174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659637118] [2022-11-16 12:52:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:50,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:50,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:50,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:50,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:52:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:52:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:50,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:52:50,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659637118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:52:50,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:52:50,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-16 12:52:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244159736] [2022-11-16 12:52:50,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:52:50,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:52:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:52:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:52:50,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-16 12:52:50,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 1029 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:50,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:50,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-16 12:52:50,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:52:53,651 INFO L130 PetriNetUnfolder]: 12664/23220 cut-off events. [2022-11-16 12:52:53,652 INFO L131 PetriNetUnfolder]: For 64652/64764 co-relation queries the response was YES. [2022-11-16 12:52:53,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103579 conditions, 23220 events. 12664/23220 cut-off events. For 64652/64764 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 212867 event pairs, 1496 based on Foata normal form. 2697/17819 useless extension candidates. Maximal degree in co-relation 84640. Up to 12151 conditions per place. [2022-11-16 12:52:54,009 INFO L137 encePairwiseOnDemand]: 128/146 looper letters, 59 selfloop transitions, 54 changer transitions 0/198 dead transitions. [2022-11-16 12:52:54,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 198 transitions, 1441 flow [2022-11-16 12:52:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:52:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:52:54,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2022-11-16 12:52:54,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8287671232876712 [2022-11-16 12:52:54,012 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2022-11-16 12:52:54,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2022-11-16 12:52:54,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:52:54,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2022-11-16 12:52:54,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:54,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:54,016 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:54,016 INFO L175 Difference]: Start difference. First operand has 137 places, 183 transitions, 1029 flow. Second operand 4 states and 484 transitions. [2022-11-16 12:52:54,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 198 transitions, 1441 flow [2022-11-16 12:52:54,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 1391 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-11-16 12:52:54,158 INFO L231 Difference]: Finished difference. Result has 136 places, 192 transitions, 1417 flow [2022-11-16 12:52:54,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1417, PETRI_PLACES=136, PETRI_TRANSITIONS=192} [2022-11-16 12:52:54,159 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 13 predicate places. [2022-11-16 12:52:54,160 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 192 transitions, 1417 flow [2022-11-16 12:52:54,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:54,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:52:54,160 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:52:54,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:52:54,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:54,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:52:54,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:52:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1296138837, now seen corresponding path program 2 times [2022-11-16 12:52:54,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:52:54,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729053601] [2022-11-16 12:52:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:52:54,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:52:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:52:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:52:54,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:52:54,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729053601] [2022-11-16 12:52:54,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729053601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:52:54,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087263552] [2022-11-16 12:52:54,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:52:54,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:52:54,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:52:54,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:52:54,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:52:54,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:52:54,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:52:54,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:52:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:52:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:52:54,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:52:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:52:54,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087263552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:52:54,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:52:54,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-16 12:52:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641530881] [2022-11-16 12:52:54,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:52:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:52:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:52:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:52:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:52:54,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 146 [2022-11-16 12:52:54,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 192 transitions, 1417 flow. Second operand has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:52:54,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:52:54,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 146 [2022-11-16 12:52:54,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:01,977 INFO L130 PetriNetUnfolder]: 28558/47842 cut-off events. [2022-11-16 12:53:01,977 INFO L131 PetriNetUnfolder]: For 120038/120346 co-relation queries the response was YES. [2022-11-16 12:53:02,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236096 conditions, 47842 events. 28558/47842 cut-off events. For 120038/120346 co-relation queries the response was YES. Maximal size of possible extension queue 3005. Compared 426847 event pairs, 6360 based on Foata normal form. 754/28971 useless extension candidates. Maximal degree in co-relation 200373. Up to 23699 conditions per place. [2022-11-16 12:53:02,490 INFO L137 encePairwiseOnDemand]: 139/146 looper letters, 431 selfloop transitions, 48 changer transitions 0/556 dead transitions. [2022-11-16 12:53:02,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 556 transitions, 5965 flow [2022-11-16 12:53:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:53:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 12:53:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1182 transitions. [2022-11-16 12:53:02,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095890410958904 [2022-11-16 12:53:02,496 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1182 transitions. [2022-11-16 12:53:02,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1182 transitions. [2022-11-16 12:53:02,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:02,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1182 transitions. [2022-11-16 12:53:02,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.2) internal successors, (1182), 10 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:02,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:02,506 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:02,506 INFO L175 Difference]: Start difference. First operand has 136 places, 192 transitions, 1417 flow. Second operand 10 states and 1182 transitions. [2022-11-16 12:53:02,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 556 transitions, 5965 flow [2022-11-16 12:53:04,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 556 transitions, 5224 flow, removed 344 selfloop flow, removed 5 redundant places. [2022-11-16 12:53:04,306 INFO L231 Difference]: Finished difference. Result has 140 places, 193 transitions, 1302 flow [2022-11-16 12:53:04,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1302, PETRI_PLACES=140, PETRI_TRANSITIONS=193} [2022-11-16 12:53:04,307 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 17 predicate places. [2022-11-16 12:53:04,308 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 193 transitions, 1302 flow [2022-11-16 12:53:04,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:04,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:04,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:04,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:04,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:53:04,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:53:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash -769932521, now seen corresponding path program 1 times [2022-11-16 12:53:04,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:04,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451663418] [2022-11-16 12:53:04,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:04,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:04,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:04,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451663418] [2022-11-16 12:53:04,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451663418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:04,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:04,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:53:04,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231538142] [2022-11-16 12:53:04,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:04,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:53:04,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:53:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:53:04,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-16 12:53:04,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 193 transitions, 1302 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:04,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:04,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-16 12:53:04,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:53:13,894 INFO L130 PetriNetUnfolder]: 38433/65786 cut-off events. [2022-11-16 12:53:13,895 INFO L131 PetriNetUnfolder]: For 135304/136077 co-relation queries the response was YES. [2022-11-16 12:53:14,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272869 conditions, 65786 events. 38433/65786 cut-off events. For 135304/136077 co-relation queries the response was YES. Maximal size of possible extension queue 4611. Compared 644036 event pairs, 10146 based on Foata normal form. 66/43446 useless extension candidates. Maximal degree in co-relation 241066. Up to 34182 conditions per place. [2022-11-16 12:53:14,583 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 198 selfloop transitions, 5 changer transitions 0/287 dead transitions. [2022-11-16 12:53:14,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 287 transitions, 2681 flow [2022-11-16 12:53:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:53:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:53:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-16 12:53:14,585 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8424657534246576 [2022-11-16 12:53:14,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-16 12:53:14,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-16 12:53:14,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:53:14,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-16 12:53:14,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,588 INFO L175 Difference]: Start difference. First operand has 140 places, 193 transitions, 1302 flow. Second operand 3 states and 369 transitions. [2022-11-16 12:53:14,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 287 transitions, 2681 flow [2022-11-16 12:53:16,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 287 transitions, 2506 flow, removed 28 selfloop flow, removed 7 redundant places. [2022-11-16 12:53:16,473 INFO L231 Difference]: Finished difference. Result has 136 places, 197 transitions, 1288 flow [2022-11-16 12:53:16,473 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1288, PETRI_PLACES=136, PETRI_TRANSITIONS=197} [2022-11-16 12:53:16,474 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 13 predicate places. [2022-11-16 12:53:16,474 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 197 transitions, 1288 flow [2022-11-16 12:53:16,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:16,475 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:53:16,475 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:16,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:53:16,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-16 12:53:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:16,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1296138839, now seen corresponding path program 2 times [2022-11-16 12:53:16,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:53:16,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781735259] [2022-11-16 12:53:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:53:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:16,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:53:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781735259] [2022-11-16 12:53:16,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781735259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:53:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447649244] [2022-11-16 12:53:16,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:53:16,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:53:16,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:53:16,576 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:53:16,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9427a442-fdf0-4c72-974d-851c3696da07/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:53:16,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:53:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:53:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:16,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:53:16,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447649244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:16,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:53:16,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 12:53:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780484873] [2022-11-16 12:53:16,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:53:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:53:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:53:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:53:16,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-16 12:53:16,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 197 transitions, 1288 flow. Second operand has 13 states, 13 states have (on average 110.3076923076923) internal successors, (1434), 13 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:16,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:53:16,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-16 12:53:16,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand