./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8 --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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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-2329fc7 [2022-12-13 22:22:40,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:22:40,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:22:40,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:22:40,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:22:40,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:22:40,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:22:40,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:22:40,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:22:40,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:22:40,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:22:40,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:22:40,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:22:40,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:22:40,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:22:40,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:22:40,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:22:40,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:22:40,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:22:40,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:22:40,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:22:40,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:22:40,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:22:40,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:22:40,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:22:40,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:22:40,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:22:40,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:22:40,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:22:40,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:22:40,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:22:40,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:22:40,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:22:40,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:22:40,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:22:40,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:22:40,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:22:40,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:22:40,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:22:40,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:22:40,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:22:40,238 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 22:22:40,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:22:40,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:22:40,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:22:40,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:22:40,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:22:40,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:22:40,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:22:40,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:22:40,262 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:22:40,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:22:40,263 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:22:40,263 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:22:40,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:22:40,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:22:40,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:22:40,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:22:40,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:22:40,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:22:40,264 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 22:22:40,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:22:40,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:22:40,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:22:40,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:22:40,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:22:40,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:22:40,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:22:40,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:22:40,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:22:40,266 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:22:40,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:22:40,267 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:22:40,267 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-12-13 22:22:40,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:22:40,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:22:40,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:22:40,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:22:40,472 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:22:40,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-13 22:22:43,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:22:43,237 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:22:43,237 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-13 22:22:43,243 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/data/4b0f3e0c8/e54ec62fc840440ebe23be8b685fd192/FLAG440c64721 [2022-12-13 22:22:43,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/data/4b0f3e0c8/e54ec62fc840440ebe23be8b685fd192 [2022-12-13 22:22:43,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:22:43,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:22:43,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:22:43,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:22:43,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:22:43,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b69dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43, skipping insertion in model container [2022-12-13 22:22:43,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:22:43,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:22:43,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:43,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:43,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:43,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:43,804 WARN L237 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_90a5ba2b-a980-4ed4-a087-85496b077815/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-12-13 22:22:43,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:22:43,811 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:22:43,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:43,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:43,822 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 22:22:43,822 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 22:22:43,825 WARN L237 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_90a5ba2b-a980-4ed4-a087-85496b077815/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-12-13 22:22:43,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:22:43,835 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:22:43,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43 WrapperNode [2022-12-13 22:22:43,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:22:43,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:22:43,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:22:43,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:22:43,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,858 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-12-13 22:22:43,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:22:43,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:22:43,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:22:43,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:22:43,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:22:43,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:22:43,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:22:43,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:22:43,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (1/1) ... [2022-12-13 22:22:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:22:43,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:43,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:22:43,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:22:43,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 22:22:43,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 22:22:43,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:22:43,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:22:43,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:22:43,920 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:22:43,984 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:22:43,985 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:22:44,111 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:22:44,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:22:44,184 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 22:22:44,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:22:44 BoogieIcfgContainer [2022-12-13 22:22:44,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:22:44,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:22:44,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:22:44,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:22:44,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:22:43" (1/3) ... [2022-12-13 22:22:44,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bb5450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:22:44, skipping insertion in model container [2022-12-13 22:22:44,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:43" (2/3) ... [2022-12-13 22:22:44,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bb5450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:22:44, skipping insertion in model container [2022-12-13 22:22:44,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:22:44" (3/3) ... [2022-12-13 22:22:44,192 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-12-13 22:22:44,198 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 22:22:44,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:22:44,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-12-13 22:22:44,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:22:44,253 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 22:22:44,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 198 flow [2022-12-13 22:22:44,331 INFO L130 PetriNetUnfolder]: 6/89 cut-off events. [2022-12-13 22:22:44,332 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 22:22:44,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2022-12-13 22:22:44,337 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 198 flow [2022-12-13 22:22:44,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 70 transitions, 149 flow [2022-12-13 22:22:44,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:22:44,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 70 transitions, 149 flow [2022-12-13 22:22:44,357 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 70 transitions, 149 flow [2022-12-13 22:22:44,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 149 flow [2022-12-13 22:22:44,379 INFO L130 PetriNetUnfolder]: 5/70 cut-off events. [2022-12-13 22:22:44,379 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:22:44,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 5/70 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 87 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2022-12-13 22:22:44,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 772 [2022-12-13 22:22:46,224 INFO L134 LiptonReduction]: Checked pairs total: 749 [2022-12-13 22:22:46,224 INFO L136 LiptonReduction]: Total number of compositions: 65 [2022-12-13 22:22:46,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:22:46,245 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;@277bd6b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:22:46,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-12-13 22:22:46,248 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 22:22:46,248 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:22:46,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:46,248 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 22:22:46,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:46,254 INFO L85 PathProgramCache]: Analyzing trace with hash 11566986, now seen corresponding path program 1 times [2022-12-13 22:22:46,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:46,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047712975] [2022-12-13 22:22:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:46,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047712975] [2022-12-13 22:22:46,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047712975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:46,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:46,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:22:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272917333] [2022-12-13 22:22:46,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:46,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:46,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:46,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:46,573 INFO L130 PetriNetUnfolder]: 231/351 cut-off events. [2022-12-13 22:22:46,573 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 22:22:46,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 351 events. 231/351 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1283 event pairs, 39 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 619. Up to 306 conditions per place. [2022-12-13 22:22:46,576 INFO L137 encePairwiseOnDemand]: 146/156 looper letters, 22 selfloop transitions, 4 changer transitions 3/31 dead transitions. [2022-12-13 22:22:46,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 135 flow [2022-12-13 22:22:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-12-13 22:22:46,587 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2022-12-13 22:22:46,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-12-13 22:22:46,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-12-13 22:22:46,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:46,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-12-13 22:22:46,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,597 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 51 flow. Second operand 3 states and 255 transitions. [2022-12-13 22:22:46,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 135 flow [2022-12-13 22:22:46,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:22:46,601 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 78 flow [2022-12-13 22:22:46,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2022-12-13 22:22:46,605 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2022-12-13 22:22:46,605 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 78 flow [2022-12-13 22:22:46,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:46,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 22:22:46,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:22:46,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 11567028, now seen corresponding path program 1 times [2022-12-13 22:22:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:46,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719503131] [2022-12-13 22:22:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:46,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:46,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719503131] [2022-12-13 22:22:46,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719503131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:46,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:46,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:22:46,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497642437] [2022-12-13 22:22:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:46,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:46,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:46,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-12-13 22:22:46,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:46,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-12-13 22:22:46,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:46,717 INFO L130 PetriNetUnfolder]: 222/349 cut-off events. [2022-12-13 22:22:46,717 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 22:22:46,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 349 events. 222/349 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 1434 event pairs, 87 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 499. Up to 293 conditions per place. [2022-12-13 22:22:46,719 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 23 selfloop transitions, 2 changer transitions 3/29 dead transitions. [2022-12-13 22:22:46,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 143 flow [2022-12-13 22:22:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:46,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2022-12-13 22:22:46,721 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2022-12-13 22:22:46,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2022-12-13 22:22:46,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2022-12-13 22:22:46,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:46,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2022-12-13 22:22:46,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,725 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 78 flow. Second operand 3 states and 246 transitions. [2022-12-13 22:22:46,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 143 flow [2022-12-13 22:22:46,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:46,726 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 70 flow [2022-12-13 22:22:46,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2022-12-13 22:22:46,727 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2022-12-13 22:22:46,727 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 70 flow [2022-12-13 22:22:46,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:46,728 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:22:46,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:22:46,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 358578238, now seen corresponding path program 1 times [2022-12-13 22:22:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:46,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710881669] [2022-12-13 22:22:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:46,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710881669] [2022-12-13 22:22:46,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710881669] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:46,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417374044] [2022-12-13 22:22:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:46,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:46,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:46,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:22:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:46,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:22:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:46,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:46,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417374044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:46,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:46,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:22:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280960463] [2022-12-13 22:22:46,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:46,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:22:46,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:22:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:22:46,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-12-13 22:22:46,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 70 flow. Second operand has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:46,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:46,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-12-13 22:22:46,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:47,106 INFO L130 PetriNetUnfolder]: 660/991 cut-off events. [2022-12-13 22:22:47,107 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-12-13 22:22:47,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 991 events. 660/991 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4565 event pairs, 68 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 2008. Up to 503 conditions per place. [2022-12-13 22:22:47,111 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 69 selfloop transitions, 9 changer transitions 3/82 dead transitions. [2022-12-13 22:22:47,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 82 transitions, 416 flow [2022-12-13 22:22:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:22:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 22:22:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 588 transitions. [2022-12-13 22:22:47,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2022-12-13 22:22:47,114 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 588 transitions. [2022-12-13 22:22:47,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 588 transitions. [2022-12-13 22:22:47,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:47,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 588 transitions. [2022-12-13 22:22:47,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,117 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,118 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 70 flow. Second operand 7 states and 588 transitions. [2022-12-13 22:22:47,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 82 transitions, 416 flow [2022-12-13 22:22:47,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 82 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:47,119 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 125 flow [2022-12-13 22:22:47,119 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=125, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2022-12-13 22:22:47,120 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2022-12-13 22:22:47,120 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 125 flow [2022-12-13 22:22:47,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 73.42857142857143) internal successors, (514), 7 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:47,120 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 22:22:47,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:22:47,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:47,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:47,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1768976141, now seen corresponding path program 1 times [2022-12-13 22:22:47,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:47,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588274496] [2022-12-13 22:22:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:47,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:47,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:47,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588274496] [2022-12-13 22:22:47,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588274496] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785702592] [2022-12-13 22:22:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:47,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:47,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:47,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:22:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:22:47,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:47,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:22:47,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785702592] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:47,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:22:47,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-12-13 22:22:47,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213797455] [2022-12-13 22:22:47,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:22:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:22:47,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:22:47,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-12-13 22:22:47,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:47,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-12-13 22:22:47,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:47,587 INFO L130 PetriNetUnfolder]: 601/918 cut-off events. [2022-12-13 22:22:47,587 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-12-13 22:22:47,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 918 events. 601/918 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 4331 event pairs, 26 based on Foata normal form. 28/623 useless extension candidates. Maximal degree in co-relation 2221. Up to 656 conditions per place. [2022-12-13 22:22:47,592 INFO L137 encePairwiseOnDemand]: 153/156 looper letters, 42 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2022-12-13 22:22:47,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 49 transitions, 264 flow [2022-12-13 22:22:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:22:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:22:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2022-12-13 22:22:47,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2022-12-13 22:22:47,594 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2022-12-13 22:22:47,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2022-12-13 22:22:47,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:47,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2022-12-13 22:22:47,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,596 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,596 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 125 flow. Second operand 5 states and 408 transitions. [2022-12-13 22:22:47,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 49 transitions, 264 flow [2022-12-13 22:22:47,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:47,598 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 102 flow [2022-12-13 22:22:47,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2022-12-13 22:22:47,599 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2022-12-13 22:22:47,599 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 102 flow [2022-12-13 22:22:47,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:47,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:47,599 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:22:47,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:22:47,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:47,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash 358578196, now seen corresponding path program 1 times [2022-12-13 22:22:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:47,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213468000] [2022-12-13 22:22:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:47,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213468000] [2022-12-13 22:22:47,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213468000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:47,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642599828] [2022-12-13 22:22:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:47,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:47,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:47,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:22:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:48,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:22:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:48,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:22:48,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642599828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:48,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:22:48,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2022-12-13 22:22:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115880415] [2022-12-13 22:22:48,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:48,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:22:48,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:48,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:48,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:48,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:48,134 INFO L130 PetriNetUnfolder]: 674/1050 cut-off events. [2022-12-13 22:22:48,134 INFO L131 PetriNetUnfolder]: For 381/381 co-relation queries the response was YES. [2022-12-13 22:22:48,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2874 conditions, 1050 events. 674/1050 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4932 event pairs, 112 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 2620. Up to 554 conditions per place. [2022-12-13 22:22:48,138 INFO L137 encePairwiseOnDemand]: 147/156 looper letters, 25 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2022-12-13 22:22:48,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 248 flow [2022-12-13 22:22:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2022-12-13 22:22:48,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2022-12-13 22:22:48,140 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2022-12-13 22:22:48,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2022-12-13 22:22:48,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:48,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2022-12-13 22:22:48,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,142 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,142 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 102 flow. Second operand 4 states and 324 transitions. [2022-12-13 22:22:48,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 248 flow [2022-12-13 22:22:48,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:22:48,144 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 218 flow [2022-12-13 22:22:48,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2022-12-13 22:22:48,144 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2022-12-13 22:22:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 218 flow [2022-12-13 22:22:48,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:48,145 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 22:22:48,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 22:22:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:48,345 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash 358578197, now seen corresponding path program 1 times [2022-12-13 22:22:48,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:48,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135421770] [2022-12-13 22:22:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:48,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:48,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135421770] [2022-12-13 22:22:48,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135421770] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:48,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306118161] [2022-12-13 22:22:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:48,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:48,385 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:48,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:22:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:22:48,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:48,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:48,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306118161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:48,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:48,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 22:22:48,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587664313] [2022-12-13 22:22:48,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:48,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:22:48,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:22:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:22:48,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:48,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:48,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:48,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:48,676 INFO L130 PetriNetUnfolder]: 809/1367 cut-off events. [2022-12-13 22:22:48,676 INFO L131 PetriNetUnfolder]: For 1885/1885 co-relation queries the response was YES. [2022-12-13 22:22:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 1367 events. 809/1367 cut-off events. For 1885/1885 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7096 event pairs, 90 based on Foata normal form. 276/1517 useless extension candidates. Maximal degree in co-relation 4573. Up to 522 conditions per place. [2022-12-13 22:22:48,682 INFO L137 encePairwiseOnDemand]: 148/156 looper letters, 60 selfloop transitions, 34 changer transitions 3/99 dead transitions. [2022-12-13 22:22:48,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 99 transitions, 800 flow [2022-12-13 22:22:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:22:48,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 22:22:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 592 transitions. [2022-12-13 22:22:48,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5421245421245421 [2022-12-13 22:22:48,683 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 592 transitions. [2022-12-13 22:22:48,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 592 transitions. [2022-12-13 22:22:48,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:48,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 592 transitions. [2022-12-13 22:22:48,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.57142857142857) internal successors, (592), 7 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,686 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,686 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 218 flow. Second operand 7 states and 592 transitions. [2022-12-13 22:22:48,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 99 transitions, 800 flow [2022-12-13 22:22:48,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 99 transitions, 751 flow, removed 24 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:48,690 INFO L231 Difference]: Finished difference. Result has 45 places, 58 transitions, 614 flow [2022-12-13 22:22:48,690 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=614, PETRI_PLACES=45, PETRI_TRANSITIONS=58} [2022-12-13 22:22:48,690 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2022-12-13 22:22:48,690 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 58 transitions, 614 flow [2022-12-13 22:22:48,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:48,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:48,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:22:48,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:48,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:48,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:48,892 INFO L85 PathProgramCache]: Analyzing trace with hash 813689427, now seen corresponding path program 1 times [2022-12-13 22:22:48,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:48,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518704173] [2022-12-13 22:22:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:48,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:48,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:48,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518704173] [2022-12-13 22:22:48,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518704173] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:48,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:22:48,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:22:48,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746729700] [2022-12-13 22:22:48,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:22:48,924 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:48,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 58 transitions, 614 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:48,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:48,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:48,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:49,078 INFO L130 PetriNetUnfolder]: 841/1481 cut-off events. [2022-12-13 22:22:49,078 INFO L131 PetriNetUnfolder]: For 3057/3057 co-relation queries the response was YES. [2022-12-13 22:22:49,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5874 conditions, 1481 events. 841/1481 cut-off events. For 3057/3057 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8137 event pairs, 427 based on Foata normal form. 6/1341 useless extension candidates. Maximal degree in co-relation 3862. Up to 1297 conditions per place. [2022-12-13 22:22:49,084 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 69 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2022-12-13 22:22:49,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 75 transitions, 896 flow [2022-12-13 22:22:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2022-12-13 22:22:49,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5299145299145299 [2022-12-13 22:22:49,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2022-12-13 22:22:49,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2022-12-13 22:22:49,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:49,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2022-12-13 22:22:49,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,087 INFO L175 Difference]: Start difference. First operand has 45 places, 58 transitions, 614 flow. Second operand 3 states and 248 transitions. [2022-12-13 22:22:49,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 75 transitions, 896 flow [2022-12-13 22:22:49,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 75 transitions, 832 flow, removed 32 selfloop flow, removed 0 redundant places. [2022-12-13 22:22:49,100 INFO L231 Difference]: Finished difference. Result has 48 places, 62 transitions, 631 flow [2022-12-13 22:22:49,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=631, PETRI_PLACES=48, PETRI_TRANSITIONS=62} [2022-12-13 22:22:49,101 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 22 predicate places. [2022-12-13 22:22:49,101 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 62 transitions, 631 flow [2022-12-13 22:22:49,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:49,102 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 22:22:49,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:22:49,102 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:49,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash 820990516, now seen corresponding path program 2 times [2022-12-13 22:22:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:49,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480974567] [2022-12-13 22:22:49,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:49,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:49,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:49,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480974567] [2022-12-13 22:22:49,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480974567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:49,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090614468] [2022-12-13 22:22:49,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:22:49,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:49,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:49,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:22:49,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:22:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:22:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:22:49,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:22:49,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090614468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:22:49,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:22:49,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-12-13 22:22:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405187655] [2022-12-13 22:22:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:49,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:22:49,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:49,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:22:49,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:22:49,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-12-13 22:22:49,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 62 transitions, 631 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:49,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-12-13 22:22:49,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:49,329 INFO L130 PetriNetUnfolder]: 577/1020 cut-off events. [2022-12-13 22:22:49,329 INFO L131 PetriNetUnfolder]: For 2745/2777 co-relation queries the response was YES. [2022-12-13 22:22:49,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3942 conditions, 1020 events. 577/1020 cut-off events. For 2745/2777 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5327 event pairs, 369 based on Foata normal form. 62/1040 useless extension candidates. Maximal degree in co-relation 2580. Up to 1016 conditions per place. [2022-12-13 22:22:49,334 INFO L137 encePairwiseOnDemand]: 153/156 looper letters, 47 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2022-12-13 22:22:49,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 586 flow [2022-12-13 22:22:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:22:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:22:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2022-12-13 22:22:49,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2022-12-13 22:22:49,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2022-12-13 22:22:49,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2022-12-13 22:22:49,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:49,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2022-12-13 22:22:49,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,337 INFO L175 Difference]: Start difference. First operand has 48 places, 62 transitions, 631 flow. Second operand 3 states and 232 transitions. [2022-12-13 22:22:49,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 586 flow [2022-12-13 22:22:49,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 558 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 22:22:49,342 INFO L231 Difference]: Finished difference. Result has 44 places, 50 transitions, 464 flow [2022-12-13 22:22:49,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=44, PETRI_TRANSITIONS=50} [2022-12-13 22:22:49,343 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2022-12-13 22:22:49,343 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 50 transitions, 464 flow [2022-12-13 22:22:49,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:49,343 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2022-12-13 22:22:49,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:22:49,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:49,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 820990475, now seen corresponding path program 2 times [2022-12-13 22:22:49,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:49,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907347529] [2022-12-13 22:22:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:49,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907347529] [2022-12-13 22:22:49,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907347529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:49,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400426430] [2022-12-13 22:22:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:22:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:49,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:49,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:22:49,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:22:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:22:49,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:49,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400426430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:49,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:49,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 22:22:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137036333] [2022-12-13 22:22:49,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:22:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:22:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:22:49,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:49,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:49,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:49,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:49,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:50,111 INFO L130 PetriNetUnfolder]: 1295/2295 cut-off events. [2022-12-13 22:22:50,111 INFO L131 PetriNetUnfolder]: For 7228/7298 co-relation queries the response was YES. [2022-12-13 22:22:50,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8298 conditions, 2295 events. 1295/2295 cut-off events. For 7228/7298 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13570 event pairs, 141 based on Foata normal form. 370/2543 useless extension candidates. Maximal degree in co-relation 8279. Up to 563 conditions per place. [2022-12-13 22:22:50,124 INFO L137 encePairwiseOnDemand]: 150/156 looper letters, 99 selfloop transitions, 96 changer transitions 3/200 dead transitions. [2022-12-13 22:22:50,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 200 transitions, 1783 flow [2022-12-13 22:22:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 22:22:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 22:22:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1091 transitions. [2022-12-13 22:22:50,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5379684418145957 [2022-12-13 22:22:50,128 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1091 transitions. [2022-12-13 22:22:50,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1091 transitions. [2022-12-13 22:22:50,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:50,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1091 transitions. [2022-12-13 22:22:50,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 83.92307692307692) internal successors, (1091), 13 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 156.0) internal successors, (2184), 14 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,135 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 156.0) internal successors, (2184), 14 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,135 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 464 flow. Second operand 13 states and 1091 transitions. [2022-12-13 22:22:50,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 200 transitions, 1783 flow [2022-12-13 22:22:50,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 200 transitions, 1782 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:22:50,146 INFO L231 Difference]: Finished difference. Result has 66 places, 125 transitions, 1685 flow [2022-12-13 22:22:50,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1685, PETRI_PLACES=66, PETRI_TRANSITIONS=125} [2022-12-13 22:22:50,147 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2022-12-13 22:22:50,147 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 125 transitions, 1685 flow [2022-12-13 22:22:50,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.3076923076923) internal successors, (966), 13 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:50,148 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:22:50,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 22:22:50,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 22:22:50,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1428252151, now seen corresponding path program 1 times [2022-12-13 22:22:50,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:50,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152280928] [2022-12-13 22:22:50,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:50,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152280928] [2022-12-13 22:22:50,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152280928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410571636] [2022-12-13 22:22:50,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:50,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:50,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:50,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:22:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:22:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:50,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410571636] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:50,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:22:50,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2022-12-13 22:22:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408458464] [2022-12-13 22:22:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:22:50,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:22:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:22:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:22:50,622 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 156 [2022-12-13 22:22:50,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 125 transitions, 1685 flow. Second operand has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:50,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 156 [2022-12-13 22:22:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:50,900 INFO L130 PetriNetUnfolder]: 1083/1901 cut-off events. [2022-12-13 22:22:50,900 INFO L131 PetriNetUnfolder]: For 9891/9891 co-relation queries the response was YES. [2022-12-13 22:22:50,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7870 conditions, 1901 events. 1083/1901 cut-off events. For 9891/9891 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10464 event pairs, 257 based on Foata normal form. 122/2021 useless extension candidates. Maximal degree in co-relation 7839. Up to 1714 conditions per place. [2022-12-13 22:22:50,911 INFO L137 encePairwiseOnDemand]: 152/156 looper letters, 110 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2022-12-13 22:22:50,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1633 flow [2022-12-13 22:22:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:22:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:22:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2022-12-13 22:22:50,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5016025641025641 [2022-12-13 22:22:50,912 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2022-12-13 22:22:50,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2022-12-13 22:22:50,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:50,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2022-12-13 22:22:50,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,914 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,914 INFO L175 Difference]: Start difference. First operand has 66 places, 125 transitions, 1685 flow. Second operand 4 states and 313 transitions. [2022-12-13 22:22:50,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1633 flow [2022-12-13 22:22:50,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 1474 flow, removed 72 selfloop flow, removed 4 redundant places. [2022-12-13 22:22:50,951 INFO L231 Difference]: Finished difference. Result has 66 places, 98 transitions, 1150 flow [2022-12-13 22:22:50,951 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1150, PETRI_PLACES=66, PETRI_TRANSITIONS=98} [2022-12-13 22:22:50,952 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2022-12-13 22:22:50,952 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 98 transitions, 1150 flow [2022-12-13 22:22:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:50,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:50,952 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2022-12-13 22:22:50,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 22:22:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 22:22:51,154 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1948600885, now seen corresponding path program 3 times [2022-12-13 22:22:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:51,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963991523] [2022-12-13 22:22:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:51,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963991523] [2022-12-13 22:22:51,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963991523] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226420974] [2022-12-13 22:22:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:22:51,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:51,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:51,382 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:51,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:22:51,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 22:22:51,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:51,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:22:51,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:51,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:51,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226420974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:51,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:51,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-12-13 22:22:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998734733] [2022-12-13 22:22:51,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 22:22:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 22:22:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 22:22:51,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:51,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 98 transitions, 1150 flow. Second operand has 25 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:51,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:51,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:51,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:52,340 INFO L130 PetriNetUnfolder]: 2530/4448 cut-off events. [2022-12-13 22:22:52,340 INFO L131 PetriNetUnfolder]: For 60276/60410 co-relation queries the response was YES. [2022-12-13 22:22:52,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16174 conditions, 4448 events. 2530/4448 cut-off events. For 60276/60410 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 26266 event pairs, 277 based on Foata normal form. 712/5154 useless extension candidates. Maximal degree in co-relation 16145. Up to 905 conditions per place. [2022-12-13 22:22:52,362 INFO L137 encePairwiseOnDemand]: 151/156 looper letters, 117 selfloop transitions, 242 changer transitions 69/431 dead transitions. [2022-12-13 22:22:52,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 431 transitions, 4158 flow [2022-12-13 22:22:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 22:22:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 22:22:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2087 transitions. [2022-12-13 22:22:52,367 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5351282051282051 [2022-12-13 22:22:52,367 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2087 transitions. [2022-12-13 22:22:52,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2087 transitions. [2022-12-13 22:22:52,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:52,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2087 transitions. [2022-12-13 22:22:52,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 83.48) internal successors, (2087), 25 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:52,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 156.0) internal successors, (4056), 26 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:52,380 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 156.0) internal successors, (4056), 26 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:52,381 INFO L175 Difference]: Start difference. First operand has 66 places, 98 transitions, 1150 flow. Second operand 25 states and 2087 transitions. [2022-12-13 22:22:52,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 431 transitions, 4158 flow [2022-12-13 22:22:52,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 431 transitions, 4158 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:22:52,426 INFO L231 Difference]: Finished difference. Result has 112 places, 272 transitions, 4045 flow [2022-12-13 22:22:52,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4045, PETRI_PLACES=112, PETRI_TRANSITIONS=272} [2022-12-13 22:22:52,427 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2022-12-13 22:22:52,427 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 272 transitions, 4045 flow [2022-12-13 22:22:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.16) internal successors, (1854), 25 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:52,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:52,428 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1] [2022-12-13 22:22:52,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:22:52,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:52,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:52,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1615859019, now seen corresponding path program 4 times [2022-12-13 22:22:52,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:52,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842274659] [2022-12-13 22:22:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:53,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:53,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842274659] [2022-12-13 22:22:53,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842274659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:53,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490168528] [2022-12-13 22:22:53,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:22:53,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:53,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:53,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:53,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:22:53,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:22:53,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 22:22:53,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:53,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:22:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490168528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:22:53,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:22:53,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-12-13 22:22:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843429152] [2022-12-13 22:22:53,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:22:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 22:22:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:22:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 22:22:53,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 22:22:53,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:22:53,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 272 transitions, 4045 flow. Second operand has 49 states, 49 states have (on average 74.08163265306122) internal successors, (3630), 49 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:53,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:22:53,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:22:53,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:22:56,760 INFO L130 PetriNetUnfolder]: 7954/13964 cut-off events. [2022-12-13 22:22:56,760 INFO L131 PetriNetUnfolder]: For 727478/727756 co-relation queries the response was YES. [2022-12-13 22:22:56,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57860 conditions, 13964 events. 7954/13964 cut-off events. For 727478/727756 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 91233 event pairs, 893 based on Foata normal form. 1504/15462 useless extension candidates. Maximal degree in co-relation 57807. Up to 4005 conditions per place. [2022-12-13 22:22:56,832 INFO L137 encePairwiseOnDemand]: 151/156 looper letters, 215 selfloop transitions, 882 changer transitions 141/1241 dead transitions. [2022-12-13 22:22:56,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1241 transitions, 15745 flow [2022-12-13 22:22:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 22:22:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 22:22:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4103 transitions. [2022-12-13 22:22:56,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5367608581894296 [2022-12-13 22:22:56,843 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4103 transitions. [2022-12-13 22:22:56,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4103 transitions. [2022-12-13 22:22:56,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:22:56,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4103 transitions. [2022-12-13 22:22:56,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 83.73469387755102) internal successors, (4103), 49 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:56,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 156.0) internal successors, (7800), 50 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:56,861 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 156.0) internal successors, (7800), 50 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:56,861 INFO L175 Difference]: Start difference. First operand has 112 places, 272 transitions, 4045 flow. Second operand 49 states and 4103 transitions. [2022-12-13 22:22:56,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1241 transitions, 15745 flow [2022-12-13 22:22:57,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1241 transitions, 13462 flow, removed 1134 selfloop flow, removed 2 redundant places. [2022-12-13 22:22:57,222 INFO L231 Difference]: Finished difference. Result has 204 places, 914 transitions, 14049 flow [2022-12-13 22:22:57,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=14049, PETRI_PLACES=204, PETRI_TRANSITIONS=914} [2022-12-13 22:22:57,223 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 178 predicate places. [2022-12-13 22:22:57,223 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 914 transitions, 14049 flow [2022-12-13 22:22:57,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 74.08163265306122) internal successors, (3630), 49 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:22:57,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:22:57,224 INFO L209 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1] [2022-12-13 22:22:57,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 22:22:57,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 22:22:57,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:22:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:22:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2110061643, now seen corresponding path program 5 times [2022-12-13 22:22:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:22:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913574035] [2022-12-13 22:22:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:22:57,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:22:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:22:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:58,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:22:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913574035] [2022-12-13 22:22:58,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913574035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:22:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629176350] [2022-12-13 22:22:58,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:22:58,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:22:58,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:22:58,622 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:22:58,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:22:58,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 22:22:58,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:22:58,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 22:22:58,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:22:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:22:58,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:00,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629176350] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:00,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:23:00,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-12-13 22:23:00,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639015052] [2022-12-13 22:23:00,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:00,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 22:23:00,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:23:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 22:23:00,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 22:23:00,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:23:00,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 914 transitions, 14049 flow. Second operand has 97 states, 97 states have (on average 74.04123711340206) internal successors, (7182), 97 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:00,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:00,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:23:00,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:19,945 INFO L130 PetriNetUnfolder]: 28066/49208 cut-off events. [2022-12-13 22:23:19,946 INFO L131 PetriNetUnfolder]: For 7511777/7512343 co-relation queries the response was YES. [2022-12-13 22:23:20,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205580 conditions, 49208 events. 28066/49208 cut-off events. For 7511777/7512343 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 359981 event pairs, 3285 based on Foata normal form. 3088/52290 useless extension candidates. Maximal degree in co-relation 205481. Up to 13821 conditions per place. [2022-12-13 22:23:20,573 INFO L137 encePairwiseOnDemand]: 151/156 looper letters, 409 selfloop transitions, 3322 changer transitions 285/4019 dead transitions. [2022-12-13 22:23:20,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 4019 transitions, 56157 flow [2022-12-13 22:23:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 22:23:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-12-13 22:23:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8135 transitions. [2022-12-13 22:23:20,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5376024319323288 [2022-12-13 22:23:20,583 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8135 transitions. [2022-12-13 22:23:20,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8135 transitions. [2022-12-13 22:23:20,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:20,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8135 transitions. [2022-12-13 22:23:20,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 83.8659793814433) internal successors, (8135), 97 states have internal predecessors, (8135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:20,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 156.0) internal successors, (15288), 98 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:20,613 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 156.0) internal successors, (15288), 98 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:20,613 INFO L175 Difference]: Start difference. First operand has 204 places, 914 transitions, 14049 flow. Second operand 97 states and 8135 transitions. [2022-12-13 22:23:20,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 4019 transitions, 56157 flow [2022-12-13 22:23:23,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 4019 transitions, 47129 flow, removed 4326 selfloop flow, removed 11 redundant places. [2022-12-13 22:23:23,663 INFO L231 Difference]: Finished difference. Result has 383 places, 3356 transitions, 51440 flow [2022-12-13 22:23:23,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=12987, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=890, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=51440, PETRI_PLACES=383, PETRI_TRANSITIONS=3356} [2022-12-13 22:23:23,664 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 357 predicate places. [2022-12-13 22:23:23,664 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 3356 transitions, 51440 flow [2022-12-13 22:23:23,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 74.04123711340206) internal successors, (7182), 97 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:23,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:23,665 INFO L209 CegarLoopForPetriNet]: trace histogram [94, 1, 1, 1, 1] [2022-12-13 22:23:23,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:23:23,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:23:23,866 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:23:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash -212346293, now seen corresponding path program 6 times [2022-12-13 22:23:23,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:23:23,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716573431] [2022-12-13 22:23:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:23:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:23:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716573431] [2022-12-13 22:23:27,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716573431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:23:27,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067562169] [2022-12-13 22:23:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:23:27,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:23:27,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:23:27,087 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:23:27,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:23:27,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2022-12-13 22:23:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:23:27,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 22:23:27,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:27,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:34,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067562169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:34,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:23:34,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2022-12-13 22:23:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521642355] [2022-12-13 22:23:34,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:34,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-13 22:23:34,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:23:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-13 22:23:34,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-12-13 22:23:34,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:23:34,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 3356 transitions, 51440 flow. Second operand has 193 states, 193 states have (on average 74.02072538860104) internal successors, (14286), 193 states have internal predecessors, (14286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:34,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:34,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:23:34,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:30,505 INFO L130 PetriNetUnfolder]: 105202/184292 cut-off events. [2022-12-13 22:26:30,505 INFO L131 PetriNetUnfolder]: For 63994161/63995303 co-relation queries the response was YES. [2022-12-13 22:26:35,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770093 conditions, 184292 events. 105202/184292 cut-off events. For 63994161/63995303 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 1502328 event pairs, 12685 based on Foata normal form. 6256/190542 useless extension candidates. Maximal degree in co-relation 769909. Up to 50733 conditions per place. [2022-12-13 22:26:35,897 INFO L137 encePairwiseOnDemand]: 151/156 looper letters, 795 selfloop transitions, 12818 changer transitions 573/14189 dead transitions. [2022-12-13 22:26:35,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 14189 transitions, 210248 flow [2022-12-13 22:26:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-12-13 22:26:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2022-12-13 22:26:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 16199 transitions. [2022-12-13 22:26:35,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5380297595323502 [2022-12-13 22:26:35,910 INFO L72 ComplementDD]: Start complementDD. Operand 193 states and 16199 transitions. [2022-12-13 22:26:35,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 193 states and 16199 transitions. [2022-12-13 22:26:35,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:35,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 193 states and 16199 transitions. [2022-12-13 22:26:35,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 194 states, 193 states have (on average 83.93264248704664) internal successors, (16199), 193 states have internal predecessors, (16199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:35,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 194 states, 194 states have (on average 156.0) internal successors, (30264), 194 states have internal predecessors, (30264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:35,948 INFO L81 ComplementDD]: Finished complementDD. Result has 194 states, 194 states have (on average 156.0) internal successors, (30264), 194 states have internal predecessors, (30264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:35,949 INFO L175 Difference]: Start difference. First operand has 383 places, 3356 transitions, 51440 flow. Second operand 193 states and 16199 transitions. [2022-12-13 22:26:35,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 14189 transitions, 210248 flow [2022-12-13 22:27:59,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 14189 transitions, 175244 flow, removed 16734 selfloop flow, removed 23 redundant places. [2022-12-13 22:27:59,283 INFO L231 Difference]: Finished difference. Result has 742 places, 12854 transitions, 196239 flow [2022-12-13 22:27:59,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=48498, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=193, PETRI_FLOW=196239, PETRI_PLACES=742, PETRI_TRANSITIONS=12854} [2022-12-13 22:27:59,285 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 716 predicate places. [2022-12-13 22:27:59,285 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 12854 transitions, 196239 flow [2022-12-13 22:27:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 74.02072538860104) internal successors, (14286), 193 states have internal predecessors, (14286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:59,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:59,287 INFO L209 CegarLoopForPetriNet]: trace histogram [190, 1, 1, 1, 1] [2022-12-13 22:27:59,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 22:27:59,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:27:59,487 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-12-13 22:27:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1927178677, now seen corresponding path program 7 times [2022-12-13 22:27:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:27:59,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880585913] [2022-12-13 22:27:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:27:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:27:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:11,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:28:11,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880585913] [2022-12-13 22:28:11,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880585913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:28:11,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299701574] [2022-12-13 22:28:11,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:28:11,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:28:11,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:28:11,018 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:28:11,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a5ba2b-a980-4ed4-a087-85496b077815/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:28:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:28:11,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 193 conjunts are in the unsatisfiable core [2022-12-13 22:28:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:28:37,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299701574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:28:37,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:28:37,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2022-12-13 22:28:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066181835] [2022-12-13 22:28:37,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:37,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-13 22:28:37,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:28:37,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-13 22:28:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-12-13 22:28:39,986 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 156 [2022-12-13 22:28:39,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 12854 transitions, 196239 flow. Second operand has 385 states, 385 states have (on average 74.01038961038961) internal successors, (28494), 385 states have internal predecessors, (28494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:39,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:28:39,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 156 [2022-12-13 22:28:39,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand