./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:30:29,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:30:29,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:30:29,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:30:29,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:30:29,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:30:29,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:30:29,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:30:29,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:30:29,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:30:29,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:30:29,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:30:29,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:30:29,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:30:29,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:30:29,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:30:29,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:30:29,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:30:29,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:30:29,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:30:29,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:30:29,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:30:29,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:30:29,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:30:29,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:30:29,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:30:29,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:30:29,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:30:29,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:30:29,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:30:29,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:30:29,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:30:29,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:30:29,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:30:29,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:30:29,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:30:29,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:30:29,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:30:29,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:30:29,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:30:29,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:30:29,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:30:29,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:30:29,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:30:29,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:30:29,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:30:29,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:30:29,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:30:29,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:30:29,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:30:29,599 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:30:29,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:30:29,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:30:29,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:30:29,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:30:29,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:30:29,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:30:29,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:30:29,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:30:29,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:30:29,601 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:30:29,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:30:29,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:30:29,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:30:29,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:30:29,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:30:29,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:30:29,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:30:29,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:30:29,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:30:29,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:30:29,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:30:29,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:30:29,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:30:29,605 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:30:29,605 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:30:29,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:30:29,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-16 12:30:29,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:30:29,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:30:29,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:30:29,899 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:30:29,900 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:30:29,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-16 12:30:30,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/data/32b46ac1c/0968d7bd180a488d9551bd95486313d6/FLAG7ecdda618 [2022-11-16 12:30:30,482 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:30:30,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-16 12:30:30,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/data/32b46ac1c/0968d7bd180a488d9551bd95486313d6/FLAG7ecdda618 [2022-11-16 12:30:30,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/data/32b46ac1c/0968d7bd180a488d9551bd95486313d6 [2022-11-16 12:30:30,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:30:30,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:30:30,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:30:30,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:30:30,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:30:30,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:30:30" (1/1) ... [2022-11-16 12:30:30,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d920761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:30, skipping insertion in model container [2022-11-16 12:30:30,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:30:30" (1/1) ... [2022-11-16 12:30:30,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:30:30,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:30:31,137 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-16 12:30:31,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:30:31,148 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:30:31,170 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-16 12:30:31,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:30:31,186 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:30:31,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31 WrapperNode [2022-11-16 12:30:31,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:30:31,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:30:31,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:30:31,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:30:31,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,230 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 82 [2022-11-16 12:30:31,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:30:31,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:30:31,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:30:31,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:30:31,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:30:31,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:30:31,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:30:31,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:30:31,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (1/1) ... [2022-11-16 12:30:31,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:30:31,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:31,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:30:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:30:31,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:30:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:30:31,358 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:30:31,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:30:31,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:30:31,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:30:31,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:30:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:30:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:30:31,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:30:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:30:31,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:30:31,364 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:30:31,466 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:30:31,468 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:30:31,699 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:30:31,830 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:30:31,831 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:30:31,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:30:31 BoogieIcfgContainer [2022-11-16 12:30:31,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:30:31,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:30:31,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:30:31,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:30:31,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:30:30" (1/3) ... [2022-11-16 12:30:31,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a797e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:30:31, skipping insertion in model container [2022-11-16 12:30:31,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:30:31" (2/3) ... [2022-11-16 12:30:31,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a797e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:30:31, skipping insertion in model container [2022-11-16 12:30:31,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:30:31" (3/3) ... [2022-11-16 12:30:31,857 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-16 12:30:31,879 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:30:31,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:30:31,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 12:30:31,893 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:30:32,056 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:30:32,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 224 flow [2022-11-16 12:30:32,202 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-16 12:30:32,203 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:30:32,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 6/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2022-11-16 12:30:32,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 104 transitions, 224 flow [2022-11-16 12:30:32,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 84 transitions, 180 flow [2022-11-16 12:30:32,228 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:30:32,236 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;@1b683ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:30:32,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-16 12:30:32,253 INFO L130 PetriNetUnfolder]: 2/43 cut-off events. [2022-11-16 12:30:32,254 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:30:32,254 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:32,255 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:32,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2094336087, now seen corresponding path program 1 times [2022-11-16 12:30:32,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:32,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944424034] [2022-11-16 12:30:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:32,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:32,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944424034] [2022-11-16 12:30:32,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944424034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:32,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:32,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:30:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575586171] [2022-11-16 12:30:32,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:32,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:30:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:30:32,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:30:32,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-16 12:30:32,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:32,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:32,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-16 12:30:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:32,846 INFO L130 PetriNetUnfolder]: 22/171 cut-off events. [2022-11-16 12:30:32,847 INFO L131 PetriNetUnfolder]: For 27/28 co-relation queries the response was YES. [2022-11-16 12:30:32,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 171 events. 22/171 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 499 event pairs, 6 based on Foata normal form. 18/146 useless extension candidates. Maximal degree in co-relation 141. Up to 39 conditions per place. [2022-11-16 12:30:32,855 INFO L137 encePairwiseOnDemand]: 94/104 looper letters, 12 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2022-11-16 12:30:32,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 217 flow [2022-11-16 12:30:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:30:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:30:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2022-11-16 12:30:32,880 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-11-16 12:30:32,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2022-11-16 12:30:32,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2022-11-16 12:30:32,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:32,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2022-11-16 12:30:32,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:32,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:32,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:32,898 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 180 flow. Second operand 3 states and 286 transitions. [2022-11-16 12:30:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 217 flow [2022-11-16 12:30:32,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 203 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:30:32,907 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 180 flow [2022-11-16 12:30:32,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-11-16 12:30:32,914 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, -2 predicate places. [2022-11-16 12:30:32,914 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 180 flow [2022-11-16 12:30:32,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:32,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:32,915 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:30:32,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1682671302, now seen corresponding path program 1 times [2022-11-16 12:30:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:32,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515430079] [2022-11-16 12:30:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:32,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:33,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:33,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515430079] [2022-11-16 12:30:33,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515430079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:33,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:33,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:30:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231304528] [2022-11-16 12:30:33,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:33,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:33,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:33,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:33,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:33,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:33,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:33,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:33,383 INFO L130 PetriNetUnfolder]: 95/261 cut-off events. [2022-11-16 12:30:33,383 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-16 12:30:33,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 261 events. 95/261 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1091 event pairs, 12 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 372. Up to 124 conditions per place. [2022-11-16 12:30:33,390 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 34 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2022-11-16 12:30:33,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 98 transitions, 309 flow [2022-11-16 12:30:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:30:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:30:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 435 transitions. [2022-11-16 12:30:33,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8365384615384616 [2022-11-16 12:30:33,406 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 435 transitions. [2022-11-16 12:30:33,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 435 transitions. [2022-11-16 12:30:33,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:33,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 435 transitions. [2022-11-16 12:30:33,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:33,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 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) [2022-11-16 12:30:33,418 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 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) [2022-11-16 12:30:33,418 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 180 flow. Second operand 5 states and 435 transitions. [2022-11-16 12:30:33,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 98 transitions, 309 flow [2022-11-16 12:30:33,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 98 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:30:33,425 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 208 flow [2022-11-16 12:30:33,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-11-16 12:30:33,427 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 3 predicate places. [2022-11-16 12:30:33,427 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 208 flow [2022-11-16 12:30:33,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:33,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:33,428 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:33,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:30:33,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:33,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2079090651, now seen corresponding path program 1 times [2022-11-16 12:30:33,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:33,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907964905] [2022-11-16 12:30:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:33,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:33,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907964905] [2022-11-16 12:30:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907964905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557528731] [2022-11-16 12:30:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:33,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:33,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:33,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:30:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:30:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557528731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:33,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:33,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 12:30:33,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073814371] [2022-11-16 12:30:33,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:33,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:33,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:33,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:33,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-16 12:30:33,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:33,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:33,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-16 12:30:33,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:34,152 INFO L130 PetriNetUnfolder]: 46/340 cut-off events. [2022-11-16 12:30:34,152 INFO L131 PetriNetUnfolder]: For 54/58 co-relation queries the response was YES. [2022-11-16 12:30:34,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555 conditions, 340 events. 46/340 cut-off events. For 54/58 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1544 event pairs, 3 based on Foata normal form. 5/286 useless extension candidates. Maximal degree in co-relation 467. Up to 59 conditions per place. [2022-11-16 12:30:34,161 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 22 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2022-11-16 12:30:34,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 355 flow [2022-11-16 12:30:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:30:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:30:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2022-11-16 12:30:34,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8983516483516484 [2022-11-16 12:30:34,165 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2022-11-16 12:30:34,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2022-11-16 12:30:34,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:34,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2022-11-16 12:30:34,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,171 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,172 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 208 flow. Second operand 7 states and 654 transitions. [2022-11-16 12:30:34,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 355 flow [2022-11-16 12:30:34,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 353 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:30:34,181 INFO L231 Difference]: Finished difference. Result has 99 places, 92 transitions, 315 flow [2022-11-16 12:30:34,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=315, PETRI_PLACES=99, PETRI_TRANSITIONS=92} [2022-11-16 12:30:34,188 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 13 predicate places. [2022-11-16 12:30:34,189 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 92 transitions, 315 flow [2022-11-16 12:30:34,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:34,190 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:34,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:30:34,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:34,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2079090650, now seen corresponding path program 1 times [2022-11-16 12:30:34,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:34,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854929058] [2022-11-16 12:30:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:34,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:34,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854929058] [2022-11-16 12:30:34,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854929058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:34,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856659389] [2022-11-16 12:30:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:34,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:34,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:34,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:30:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:30:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:34,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:34,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856659389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:34,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:34,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-16 12:30:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068272268] [2022-11-16 12:30:34,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:34,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:34,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:34,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:30:34,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-16 12:30:34,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 92 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:34,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-16 12:30:34,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:34,848 INFO L130 PetriNetUnfolder]: 44/378 cut-off events. [2022-11-16 12:30:34,848 INFO L131 PetriNetUnfolder]: For 601/663 co-relation queries the response was YES. [2022-11-16 12:30:34,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 378 events. 44/378 cut-off events. For 601/663 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1747 event pairs, 2 based on Foata normal form. 20/358 useless extension candidates. Maximal degree in co-relation 439. Up to 57 conditions per place. [2022-11-16 12:30:34,853 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 14 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2022-11-16 12:30:34,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 393 flow [2022-11-16 12:30:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:30:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 12:30:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2022-11-16 12:30:34,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8798076923076923 [2022-11-16 12:30:34,857 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2022-11-16 12:30:34,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2022-11-16 12:30:34,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:34,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2022-11-16 12:30:34,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 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) [2022-11-16 12:30:34,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,861 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,862 INFO L175 Difference]: Start difference. First operand has 99 places, 92 transitions, 315 flow. Second operand 4 states and 366 transitions. [2022-11-16 12:30:34,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 393 flow [2022-11-16 12:30:34,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 96 transitions, 377 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-16 12:30:34,869 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 369 flow [2022-11-16 12:30:34,869 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=369, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2022-11-16 12:30:34,870 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 15 predicate places. [2022-11-16 12:30:34,870 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 369 flow [2022-11-16 12:30:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:34,872 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:34,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:35,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:35,078 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash -846312056, now seen corresponding path program 1 times [2022-11-16 12:30:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624488676] [2022-11-16 12:30:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:35,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624488676] [2022-11-16 12:30:35,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624488676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152162650] [2022-11-16 12:30:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:35,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:35,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:35,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:30:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:30:35,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:35,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:35,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152162650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:35,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:35,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:30:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311119497] [2022-11-16 12:30:35,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:35,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:30:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:30:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:30:35,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:35,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 369 flow. Second operand has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:35,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:35,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:35,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:36,179 INFO L130 PetriNetUnfolder]: 304/1142 cut-off events. [2022-11-16 12:30:36,179 INFO L131 PetriNetUnfolder]: For 4352/4391 co-relation queries the response was YES. [2022-11-16 12:30:36,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3449 conditions, 1142 events. 304/1142 cut-off events. For 4352/4391 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 7230 event pairs, 13 based on Foata normal form. 36/1040 useless extension candidates. Maximal degree in co-relation 2715. Up to 230 conditions per place. [2022-11-16 12:30:36,194 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 138 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2022-11-16 12:30:36,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 216 transitions, 1670 flow [2022-11-16 12:30:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:30:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:30:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1522 transitions. [2022-11-16 12:30:36,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.813034188034188 [2022-11-16 12:30:36,201 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1522 transitions. [2022-11-16 12:30:36,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1522 transitions. [2022-11-16 12:30:36,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:36,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1522 transitions. [2022-11-16 12:30:36,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.55555555555556) internal successors, (1522), 18 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:36,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:36,213 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:36,213 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 369 flow. Second operand 18 states and 1522 transitions. [2022-11-16 12:30:36,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 216 transitions, 1670 flow [2022-11-16 12:30:36,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 216 transitions, 1493 flow, removed 88 selfloop flow, removed 1 redundant places. [2022-11-16 12:30:36,228 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 446 flow [2022-11-16 12:30:36,229 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=446, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2022-11-16 12:30:36,232 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 35 predicate places. [2022-11-16 12:30:36,232 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 446 flow [2022-11-16 12:30:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.66666666666667) internal successors, (980), 12 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:36,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:36,235 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:36,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:36,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash -465869645, now seen corresponding path program 1 times [2022-11-16 12:30:36,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:36,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910267695] [2022-11-16 12:30:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:36,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:36,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910267695] [2022-11-16 12:30:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910267695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:36,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609777983] [2022-11-16 12:30:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:36,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:36,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:30:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:30:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:36,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:36,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609777983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:36,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:36,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:30:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904151963] [2022-11-16 12:30:36,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:30:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:30:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:36,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:36,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 446 flow. Second operand has 6 states, 6 states have (on average 81.33333333333333) internal successors, (488), 6 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:36,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:36,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:36,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:37,134 INFO L130 PetriNetUnfolder]: 272/1051 cut-off events. [2022-11-16 12:30:37,134 INFO L131 PetriNetUnfolder]: For 2561/2634 co-relation queries the response was YES. [2022-11-16 12:30:37,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2983 conditions, 1051 events. 272/1051 cut-off events. For 2561/2634 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 6864 event pairs, 37 based on Foata normal form. 52/946 useless extension candidates. Maximal degree in co-relation 2281. Up to 273 conditions per place. [2022-11-16 12:30:37,148 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 50 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2022-11-16 12:30:37,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 121 transitions, 662 flow [2022-11-16 12:30:37,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:30:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:30:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 591 transitions. [2022-11-16 12:30:37,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118131868131868 [2022-11-16 12:30:37,152 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 591 transitions. [2022-11-16 12:30:37,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 591 transitions. [2022-11-16 12:30:37,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:37,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 591 transitions. [2022-11-16 12:30:37,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.42857142857143) internal successors, (591), 7 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:37,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:37,158 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:37,158 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 446 flow. Second operand 7 states and 591 transitions. [2022-11-16 12:30:37,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 121 transitions, 662 flow [2022-11-16 12:30:37,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 630 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:30:37,170 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 409 flow [2022-11-16 12:30:37,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=409, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2022-11-16 12:30:37,174 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 31 predicate places. [2022-11-16 12:30:37,175 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 409 flow [2022-11-16 12:30:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.33333333333333) internal successors, (488), 6 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:37,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:37,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:37,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:37,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:37,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:37,385 INFO L85 PathProgramCache]: Analyzing trace with hash -650724744, now seen corresponding path program 1 times [2022-11-16 12:30:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:37,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11969210] [2022-11-16 12:30:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:37,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:37,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:37,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11969210] [2022-11-16 12:30:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11969210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:37,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:37,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:30:37,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101812795] [2022-11-16 12:30:37,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:37,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:30:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:30:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:30:37,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:37,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 409 flow. Second operand has 4 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) [2022-11-16 12:30:37,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:37,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:37,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:37,872 INFO L130 PetriNetUnfolder]: 457/1568 cut-off events. [2022-11-16 12:30:37,872 INFO L131 PetriNetUnfolder]: For 2942/3120 co-relation queries the response was YES. [2022-11-16 12:30:37,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3969 conditions, 1568 events. 457/1568 cut-off events. For 2942/3120 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13259 event pairs, 193 based on Foata normal form. 28/1221 useless extension candidates. Maximal degree in co-relation 3660. Up to 732 conditions per place. [2022-11-16 12:30:37,886 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 69 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2022-11-16 12:30:37,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 144 transitions, 876 flow [2022-11-16 12:30:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:30:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:30:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 434 transitions. [2022-11-16 12:30:37,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8346153846153846 [2022-11-16 12:30:37,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 434 transitions. [2022-11-16 12:30:37,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 434 transitions. [2022-11-16 12:30:37,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:37,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 434 transitions. [2022-11-16 12:30:37,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:37,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 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) [2022-11-16 12:30:37,894 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 104.0) internal successors, (624), 6 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) [2022-11-16 12:30:37,895 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 409 flow. Second operand 5 states and 434 transitions. [2022-11-16 12:30:37,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 144 transitions, 876 flow [2022-11-16 12:30:37,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 862 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:30:37,903 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 425 flow [2022-11-16 12:30:37,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2022-11-16 12:30:37,905 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 33 predicate places. [2022-11-16 12:30:37,905 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 425 flow [2022-11-16 12:30:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-16 12:30:37,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:37,906 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:37,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:30:37,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:37,907 INFO L85 PathProgramCache]: Analyzing trace with hash 208290301, now seen corresponding path program 1 times [2022-11-16 12:30:37,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:37,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675233351] [2022-11-16 12:30:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:37,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:38,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675233351] [2022-11-16 12:30:38,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675233351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:38,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:38,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:30:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626314491] [2022-11-16 12:30:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:30:38,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-11-16 12:30:38,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:38,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:38,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-11-16 12:30:38,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:38,747 INFO L130 PetriNetUnfolder]: 483/2003 cut-off events. [2022-11-16 12:30:38,747 INFO L131 PetriNetUnfolder]: For 2241/2241 co-relation queries the response was YES. [2022-11-16 12:30:38,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4867 conditions, 2003 events. 483/2003 cut-off events. For 2241/2241 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 16310 event pairs, 339 based on Foata normal form. 0/1714 useless extension candidates. Maximal degree in co-relation 3856. Up to 999 conditions per place. [2022-11-16 12:30:38,768 INFO L137 encePairwiseOnDemand]: 96/104 looper letters, 51 selfloop transitions, 7 changer transitions 1/117 dead transitions. [2022-11-16 12:30:38,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 581 flow [2022-11-16 12:30:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:30:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:30:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 555 transitions. [2022-11-16 12:30:38,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6670673076923077 [2022-11-16 12:30:38,771 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 555 transitions. [2022-11-16 12:30:38,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 555 transitions. [2022-11-16 12:30:38,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:38,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 555 transitions. [2022-11-16 12:30:38,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.375) internal successors, (555), 8 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:38,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 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) [2022-11-16 12:30:38,777 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 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) [2022-11-16 12:30:38,777 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 425 flow. Second operand 8 states and 555 transitions. [2022-11-16 12:30:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 581 flow [2022-11-16 12:30:38,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 579 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:30:38,791 INFO L231 Difference]: Finished difference. Result has 128 places, 106 transitions, 455 flow [2022-11-16 12:30:38,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=455, PETRI_PLACES=128, PETRI_TRANSITIONS=106} [2022-11-16 12:30:38,793 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 42 predicate places. [2022-11-16 12:30:38,793 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 106 transitions, 455 flow [2022-11-16 12:30:38,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:38,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:38,794 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:38,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:30:38,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:38,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 283275449, now seen corresponding path program 1 times [2022-11-16 12:30:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:38,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061185461] [2022-11-16 12:30:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:38,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061185461] [2022-11-16 12:30:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061185461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:38,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:30:38,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:30:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408167577] [2022-11-16 12:30:38,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:30:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:30:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:30:38,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 104 [2022-11-16 12:30:38,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 106 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:38,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:38,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 104 [2022-11-16 12:30:38,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:39,430 INFO L130 PetriNetUnfolder]: 503/2050 cut-off events. [2022-11-16 12:30:39,430 INFO L131 PetriNetUnfolder]: For 2330/2359 co-relation queries the response was YES. [2022-11-16 12:30:39,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5068 conditions, 2050 events. 503/2050 cut-off events. For 2330/2359 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 17374 event pairs, 283 based on Foata normal form. 12/1899 useless extension candidates. Maximal degree in co-relation 4924. Up to 820 conditions per place. [2022-11-16 12:30:39,449 INFO L137 encePairwiseOnDemand]: 94/104 looper letters, 61 selfloop transitions, 9 changer transitions 4/138 dead transitions. [2022-11-16 12:30:39,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 138 transitions, 822 flow [2022-11-16 12:30:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:30:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:30:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 598 transitions. [2022-11-16 12:30:39,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.71875 [2022-11-16 12:30:39,452 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 598 transitions. [2022-11-16 12:30:39,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 598 transitions. [2022-11-16 12:30:39,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:39,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 598 transitions. [2022-11-16 12:30:39,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.75) internal successors, (598), 8 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:39,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 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) [2022-11-16 12:30:39,457 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 104.0) internal successors, (936), 9 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) [2022-11-16 12:30:39,457 INFO L175 Difference]: Start difference. First operand has 128 places, 106 transitions, 455 flow. Second operand 8 states and 598 transitions. [2022-11-16 12:30:39,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 138 transitions, 822 flow [2022-11-16 12:30:39,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 138 transitions, 813 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:30:39,471 INFO L231 Difference]: Finished difference. Result has 134 places, 106 transitions, 476 flow [2022-11-16 12:30:39,471 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=134, PETRI_TRANSITIONS=106} [2022-11-16 12:30:39,472 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2022-11-16 12:30:39,472 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 106 transitions, 476 flow [2022-11-16 12:30:39,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.83333333333333) internal successors, (431), 6 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:39,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:39,473 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:39,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:30:39,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash -540023610, now seen corresponding path program 1 times [2022-11-16 12:30:39,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:39,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53765717] [2022-11-16 12:30:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:39,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:39,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53765717] [2022-11-16 12:30:39,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53765717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108949364] [2022-11-16 12:30:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:39,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:39,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:39,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:30:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:30:39,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:39,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108949364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:39,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:39,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:30:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866992107] [2022-11-16 12:30:39,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:39,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:30:39,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:30:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:30:39,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:39,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 106 transitions, 476 flow. Second operand has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:39,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:39,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:39,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:40,771 INFO L130 PetriNetUnfolder]: 989/3131 cut-off events. [2022-11-16 12:30:40,771 INFO L131 PetriNetUnfolder]: For 6463/6586 co-relation queries the response was YES. [2022-11-16 12:30:40,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 3131 events. 989/3131 cut-off events. For 6463/6586 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 29071 event pairs, 83 based on Foata normal form. 102/3032 useless extension candidates. Maximal degree in co-relation 8980. Up to 442 conditions per place. [2022-11-16 12:30:40,800 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 229 selfloop transitions, 18 changer transitions 0/319 dead transitions. [2022-11-16 12:30:40,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 319 transitions, 2638 flow [2022-11-16 12:30:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:30:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:30:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1533 transitions. [2022-11-16 12:30:40,805 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8189102564102564 [2022-11-16 12:30:40,806 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1533 transitions. [2022-11-16 12:30:40,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1533 transitions. [2022-11-16 12:30:40,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:40,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1533 transitions. [2022-11-16 12:30:40,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.16666666666667) internal successors, (1533), 18 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:40,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:40,816 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 104.0) internal successors, (1976), 19 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:40,817 INFO L175 Difference]: Start difference. First operand has 134 places, 106 transitions, 476 flow. Second operand 18 states and 1533 transitions. [2022-11-16 12:30:40,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 319 transitions, 2638 flow [2022-11-16 12:30:40,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 319 transitions, 2620 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-11-16 12:30:40,836 INFO L231 Difference]: Finished difference. Result has 147 places, 118 transitions, 564 flow [2022-11-16 12:30:40,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=564, PETRI_PLACES=147, PETRI_TRANSITIONS=118} [2022-11-16 12:30:40,837 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 61 predicate places. [2022-11-16 12:30:40,838 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 118 transitions, 564 flow [2022-11-16 12:30:40,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 81.83333333333333) internal successors, (982), 12 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:40,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:40,839 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:40,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:41,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:30:41,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash -765719959, now seen corresponding path program 1 times [2022-11-16 12:30:41,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072852842] [2022-11-16 12:30:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072852842] [2022-11-16 12:30:41,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072852842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083833234] [2022-11-16 12:30:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:41,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:41,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:41,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:41,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:30:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:30:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:30:41,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:41,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083833234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:41,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:41,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:30:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153763893] [2022-11-16 12:30:41,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:30:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:30:41,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:30:41,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:41,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 118 transitions, 564 flow. Second operand has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:41,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:41,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:41,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:42,066 INFO L130 PetriNetUnfolder]: 903/2849 cut-off events. [2022-11-16 12:30:42,067 INFO L131 PetriNetUnfolder]: For 6750/6873 co-relation queries the response was YES. [2022-11-16 12:30:42,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8936 conditions, 2849 events. 903/2849 cut-off events. For 6750/6873 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 26472 event pairs, 134 based on Foata normal form. 128/2706 useless extension candidates. Maximal degree in co-relation 8665. Up to 844 conditions per place. [2022-11-16 12:30:42,102 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 86 selfloop transitions, 11 changer transitions 0/169 dead transitions. [2022-11-16 12:30:42,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 169 transitions, 1168 flow [2022-11-16 12:30:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:30:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:30:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 596 transitions. [2022-11-16 12:30:42,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8186813186813187 [2022-11-16 12:30:42,105 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 596 transitions. [2022-11-16 12:30:42,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 596 transitions. [2022-11-16 12:30:42,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:42,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 596 transitions. [2022-11-16 12:30:42,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.14285714285714) internal successors, (596), 7 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:42,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:42,109 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:42,110 INFO L175 Difference]: Start difference. First operand has 147 places, 118 transitions, 564 flow. Second operand 7 states and 596 transitions. [2022-11-16 12:30:42,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 169 transitions, 1168 flow [2022-11-16 12:30:42,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 169 transitions, 1136 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 12:30:42,132 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 527 flow [2022-11-16 12:30:42,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=527, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2022-11-16 12:30:42,133 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 57 predicate places. [2022-11-16 12:30:42,134 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 527 flow [2022-11-16 12:30:42,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:42,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:42,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:42,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:42,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:42,341 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash 106812249, now seen corresponding path program 1 times [2022-11-16 12:30:42,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:42,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304146929] [2022-11-16 12:30:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:42,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:42,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304146929] [2022-11-16 12:30:42,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304146929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:42,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501591779] [2022-11-16 12:30:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:42,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:42,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:42,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:30:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:42,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:30:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:30:43,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:30:43,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501591779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:30:43,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:30:43,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-16 12:30:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211465551] [2022-11-16 12:30:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:30:43,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:30:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:30:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:30:43,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 104 [2022-11-16 12:30:43,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 527 flow. Second operand has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:43,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:43,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 104 [2022-11-16 12:30:43,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:44,230 INFO L130 PetriNetUnfolder]: 653/3088 cut-off events. [2022-11-16 12:30:44,231 INFO L131 PetriNetUnfolder]: For 4186/4227 co-relation queries the response was YES. [2022-11-16 12:30:44,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 3088 events. 653/3088 cut-off events. For 4186/4227 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 28483 event pairs, 442 based on Foata normal form. 84/3098 useless extension candidates. Maximal degree in co-relation 7761. Up to 1415 conditions per place. [2022-11-16 12:30:44,259 INFO L137 encePairwiseOnDemand]: 97/104 looper letters, 32 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2022-11-16 12:30:44,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 112 transitions, 595 flow [2022-11-16 12:30:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:30:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:30:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2022-11-16 12:30:44,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510989010989011 [2022-11-16 12:30:44,264 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2022-11-16 12:30:44,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2022-11-16 12:30:44,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:44,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2022-11-16 12:30:44,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.71428571428571) internal successors, (474), 7 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:44,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:44,270 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:44,270 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 527 flow. Second operand 7 states and 474 transitions. [2022-11-16 12:30:44,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 112 transitions, 595 flow [2022-11-16 12:30:44,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 112 transitions, 571 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 12:30:44,296 INFO L231 Difference]: Finished difference. Result has 141 places, 112 transitions, 507 flow [2022-11-16 12:30:44,297 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=507, PETRI_PLACES=141, PETRI_TRANSITIONS=112} [2022-11-16 12:30:44,298 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 55 predicate places. [2022-11-16 12:30:44,298 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 112 transitions, 507 flow [2022-11-16 12:30:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.85714285714286) internal successors, (468), 7 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:44,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:44,300 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:44,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 12:30:44,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:44,505 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1168305961, now seen corresponding path program 2 times [2022-11-16 12:30:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:44,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580450024] [2022-11-16 12:30:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:44,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:44,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:44,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580450024] [2022-11-16 12:30:44,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580450024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:44,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858450638] [2022-11-16 12:30:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:30:44,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:44,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:44,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:44,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:30:44,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:30:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:30:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:30:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:44,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:44,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858450638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:44,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:44,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 12:30:44,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616524245] [2022-11-16 12:30:44,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:44,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:30:44,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:30:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:30:44,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-16 12:30:44,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 112 transitions, 507 flow. Second operand has 13 states, 13 states have (on average 88.3076923076923) internal successors, (1148), 13 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:44,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:44,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-16 12:30:44,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:45,647 INFO L130 PetriNetUnfolder]: 293/2877 cut-off events. [2022-11-16 12:30:45,648 INFO L131 PetriNetUnfolder]: For 5872/5937 co-relation queries the response was YES. [2022-11-16 12:30:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6860 conditions, 2877 events. 293/2877 cut-off events. For 5872/5937 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 27060 event pairs, 20 based on Foata normal form. 260/3123 useless extension candidates. Maximal degree in co-relation 6798. Up to 230 conditions per place. [2022-11-16 12:30:45,668 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 44 selfloop transitions, 46 changer transitions 0/181 dead transitions. [2022-11-16 12:30:45,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 181 transitions, 1111 flow [2022-11-16 12:30:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:30:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-16 12:30:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1123 transitions. [2022-11-16 12:30:45,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8998397435897436 [2022-11-16 12:30:45,673 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1123 transitions. [2022-11-16 12:30:45,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1123 transitions. [2022-11-16 12:30:45,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:45,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1123 transitions. [2022-11-16 12:30:45,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.58333333333333) internal successors, (1123), 12 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:45,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:45,682 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 104.0) internal successors, (1352), 13 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:45,682 INFO L175 Difference]: Start difference. First operand has 141 places, 112 transitions, 507 flow. Second operand 12 states and 1123 transitions. [2022-11-16 12:30:45,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 181 transitions, 1111 flow [2022-11-16 12:30:45,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 181 transitions, 1100 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 12:30:45,705 INFO L231 Difference]: Finished difference. Result has 157 places, 151 transitions, 1092 flow [2022-11-16 12:30:45,705 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1092, PETRI_PLACES=157, PETRI_TRANSITIONS=151} [2022-11-16 12:30:45,706 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 71 predicate places. [2022-11-16 12:30:45,706 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 151 transitions, 1092 flow [2022-11-16 12:30:45,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.3076923076923) internal successors, (1148), 13 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:45,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:45,707 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:45,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:30:45,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1755553350, now seen corresponding path program 2 times [2022-11-16 12:30:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:45,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846063238] [2022-11-16 12:30:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:46,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846063238] [2022-11-16 12:30:46,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846063238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179823417] [2022-11-16 12:30:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:30:46,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:46,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:46,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:30:46,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:30:46,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:30:46,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:30:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:30:46,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 12:30:46,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179823417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:46,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:46,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-16 12:30:46,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32548083] [2022-11-16 12:30:46,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:46,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:30:46,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:30:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:30:46,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-11-16 12:30:46,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 151 transitions, 1092 flow. Second operand has 16 states, 16 states have (on average 71.5625) internal successors, (1145), 16 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:46,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:46,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-11-16 12:30:46,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:48,176 INFO L130 PetriNetUnfolder]: 1246/4719 cut-off events. [2022-11-16 12:30:48,176 INFO L131 PetriNetUnfolder]: For 29908/29996 co-relation queries the response was YES. [2022-11-16 12:30:48,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17910 conditions, 4719 events. 1246/4719 cut-off events. For 29908/29996 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 44698 event pairs, 46 based on Foata normal form. 157/4775 useless extension candidates. Maximal degree in co-relation 17837. Up to 1050 conditions per place. [2022-11-16 12:30:48,322 INFO L137 encePairwiseOnDemand]: 95/104 looper letters, 332 selfloop transitions, 23 changer transitions 0/418 dead transitions. [2022-11-16 12:30:48,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 418 transitions, 4775 flow [2022-11-16 12:30:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:30:48,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 12:30:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1622 transitions. [2022-11-16 12:30:48,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.708916083916084 [2022-11-16 12:30:48,344 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1622 transitions. [2022-11-16 12:30:48,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1622 transitions. [2022-11-16 12:30:48,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:48,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1622 transitions. [2022-11-16 12:30:48,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 73.72727272727273) internal successors, (1622), 22 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:48,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 104.0) internal successors, (2392), 23 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:48,361 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 104.0) internal successors, (2392), 23 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:48,361 INFO L175 Difference]: Start difference. First operand has 157 places, 151 transitions, 1092 flow. Second operand 22 states and 1622 transitions. [2022-11-16 12:30:48,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 418 transitions, 4775 flow [2022-11-16 12:30:48,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 418 transitions, 4285 flow, removed 241 selfloop flow, removed 4 redundant places. [2022-11-16 12:30:48,424 INFO L231 Difference]: Finished difference. Result has 174 places, 155 transitions, 1049 flow [2022-11-16 12:30:48,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1049, PETRI_PLACES=174, PETRI_TRANSITIONS=155} [2022-11-16 12:30:48,426 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2022-11-16 12:30:48,426 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 155 transitions, 1049 flow [2022-11-16 12:30:48,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 71.5625) internal successors, (1145), 16 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:48,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:48,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:48,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:30:48,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:30:48,633 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash -769297139, now seen corresponding path program 1 times [2022-11-16 12:30:48,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:48,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935210443] [2022-11-16 12:30:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:48,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:30:48,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935210443] [2022-11-16 12:30:48,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935210443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:48,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039923251] [2022-11-16 12:30:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:48,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:48,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:48,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:30:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:30:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:30:49,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:30:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039923251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:49,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:49,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2022-11-16 12:30:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905854415] [2022-11-16 12:30:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:30:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:30:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:30:49,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 104 [2022-11-16 12:30:49,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 155 transitions, 1049 flow. Second operand has 17 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:49,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:49,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 104 [2022-11-16 12:30:49,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:30:55,319 INFO L130 PetriNetUnfolder]: 8388/24318 cut-off events. [2022-11-16 12:30:55,319 INFO L131 PetriNetUnfolder]: For 58613/59146 co-relation queries the response was YES. [2022-11-16 12:30:55,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72771 conditions, 24318 events. 8388/24318 cut-off events. For 58613/59146 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 262572 event pairs, 3259 based on Foata normal form. 670/24884 useless extension candidates. Maximal degree in co-relation 72694. Up to 8724 conditions per place. [2022-11-16 12:30:55,529 INFO L137 encePairwiseOnDemand]: 91/104 looper letters, 446 selfloop transitions, 35 changer transitions 27/555 dead transitions. [2022-11-16 12:30:55,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 555 transitions, 5572 flow [2022-11-16 12:30:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:30:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 12:30:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1757 transitions. [2022-11-16 12:30:55,534 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6497781065088757 [2022-11-16 12:30:55,534 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1757 transitions. [2022-11-16 12:30:55,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1757 transitions. [2022-11-16 12:30:55,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:30:55,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1757 transitions. [2022-11-16 12:30:55,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 67.57692307692308) internal successors, (1757), 26 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:55,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 104.0) internal successors, (2808), 27 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:55,546 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 104.0) internal successors, (2808), 27 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:55,546 INFO L175 Difference]: Start difference. First operand has 174 places, 155 transitions, 1049 flow. Second operand 26 states and 1757 transitions. [2022-11-16 12:30:55,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 555 transitions, 5572 flow [2022-11-16 12:30:55,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 555 transitions, 5328 flow, removed 16 selfloop flow, removed 16 redundant places. [2022-11-16 12:30:55,760 INFO L231 Difference]: Finished difference. Result has 194 places, 181 transitions, 1288 flow [2022-11-16 12:30:55,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1288, PETRI_PLACES=194, PETRI_TRANSITIONS=181} [2022-11-16 12:30:55,761 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 108 predicate places. [2022-11-16 12:30:55,761 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 181 transitions, 1288 flow [2022-11-16 12:30:55,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.6470588235294) internal successors, (1116), 17 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:55,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:30:55,781 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:55,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:55,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:30:55,987 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:30:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash -579249570, now seen corresponding path program 2 times [2022-11-16 12:30:55,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:55,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378640141] [2022-11-16 12:30:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:30:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378640141] [2022-11-16 12:30:56,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378640141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040132352] [2022-11-16 12:30:56,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:30:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:56,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:56,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:30:56,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:30:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:30:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:30:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:30:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 61 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:30:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040132352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:56,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-16 12:30:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791906478] [2022-11-16 12:30:56,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:30:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:30:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:30:56,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 104 [2022-11-16 12:30:56,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 181 transitions, 1288 flow. Second operand has 24 states, 24 states have (on average 82.375) internal successors, (1977), 24 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:56,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:30:56,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 104 [2022-11-16 12:30:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:31:01,595 INFO L130 PetriNetUnfolder]: 5763/15899 cut-off events. [2022-11-16 12:31:01,595 INFO L131 PetriNetUnfolder]: For 75703/76875 co-relation queries the response was YES. [2022-11-16 12:31:01,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56516 conditions, 15899 events. 5763/15899 cut-off events. For 75703/76875 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 167171 event pairs, 278 based on Foata normal form. 577/15112 useless extension candidates. Maximal degree in co-relation 56433. Up to 2750 conditions per place. [2022-11-16 12:31:01,750 INFO L137 encePairwiseOnDemand]: 98/104 looper letters, 1226 selfloop transitions, 47 changer transitions 0/1355 dead transitions. [2022-11-16 12:31:01,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1355 transitions, 16677 flow [2022-11-16 12:31:01,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:31:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-16 12:31:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2729 transitions. [2022-11-16 12:31:01,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8200120192307693 [2022-11-16 12:31:01,756 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2729 transitions. [2022-11-16 12:31:01,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2729 transitions. [2022-11-16 12:31:01,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:31:01,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2729 transitions. [2022-11-16 12:31:01,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.28125) internal successors, (2729), 32 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:01,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 104.0) internal successors, (3432), 33 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:01,771 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 104.0) internal successors, (3432), 33 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:01,771 INFO L175 Difference]: Start difference. First operand has 194 places, 181 transitions, 1288 flow. Second operand 32 states and 2729 transitions. [2022-11-16 12:31:01,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1355 transitions, 16677 flow [2022-11-16 12:31:02,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 1355 transitions, 16650 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-16 12:31:02,255 INFO L231 Difference]: Finished difference. Result has 224 places, 200 transitions, 1487 flow [2022-11-16 12:31:02,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1487, PETRI_PLACES=224, PETRI_TRANSITIONS=200} [2022-11-16 12:31:02,256 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2022-11-16 12:31:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 200 transitions, 1487 flow [2022-11-16 12:31:02,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.375) internal successors, (1977), 24 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:02,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:31:02,258 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:02,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:31:02,471 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:31:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 312268183, now seen corresponding path program 3 times [2022-11-16 12:31:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:02,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599779829] [2022-11-16 12:31:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599779829] [2022-11-16 12:31:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599779829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:31:02,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404376734] [2022-11-16 12:31:02,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:31:02,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:02,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:02,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:02,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:31:02,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:31:02,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:31:02,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:31:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:03,087 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:03,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:03,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404376734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:03,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:31:03,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 12:31:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957638657] [2022-11-16 12:31:03,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:03,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:31:03,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:31:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:31:03,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-16 12:31:03,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 200 transitions, 1487 flow. Second operand has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:03,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:31:03,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-16 12:31:03,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:31:09,344 INFO L130 PetriNetUnfolder]: 2400/18810 cut-off events. [2022-11-16 12:31:09,344 INFO L131 PetriNetUnfolder]: For 151711/152269 co-relation queries the response was YES. [2022-11-16 12:31:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54131 conditions, 18810 events. 2400/18810 cut-off events. For 151711/152269 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 227836 event pairs, 52 based on Foata normal form. 1444/20174 useless extension candidates. Maximal degree in co-relation 54043. Up to 2013 conditions per place. [2022-11-16 12:31:09,547 INFO L137 encePairwiseOnDemand]: 99/104 looper letters, 57 selfloop transitions, 206 changer transitions 0/404 dead transitions. [2022-11-16 12:31:09,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 404 transitions, 3602 flow [2022-11-16 12:31:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:31:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:31:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2228 transitions. [2022-11-16 12:31:09,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8926282051282052 [2022-11-16 12:31:09,555 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2228 transitions. [2022-11-16 12:31:09,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2228 transitions. [2022-11-16 12:31:09,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:31:09,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2228 transitions. [2022-11-16 12:31:09,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.83333333333333) internal successors, (2228), 24 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:09,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 104.0) internal successors, (2600), 25 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:09,574 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 104.0) internal successors, (2600), 25 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:09,574 INFO L175 Difference]: Start difference. First operand has 224 places, 200 transitions, 1487 flow. Second operand 24 states and 2228 transitions. [2022-11-16 12:31:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 404 transitions, 3602 flow [2022-11-16 12:31:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 404 transitions, 3538 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-16 12:31:09,986 INFO L231 Difference]: Finished difference. Result has 258 places, 360 transitions, 3878 flow [2022-11-16 12:31:09,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3878, PETRI_PLACES=258, PETRI_TRANSITIONS=360} [2022-11-16 12:31:09,987 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 172 predicate places. [2022-11-16 12:31:09,987 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 360 transitions, 3878 flow [2022-11-16 12:31:09,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.16) internal successors, (2204), 25 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:09,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:31:09,988 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:10,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:10,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:31:10,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:31:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:10,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1172350424, now seen corresponding path program 3 times [2022-11-16 12:31:10,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:10,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244955040] [2022-11-16 12:31:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 56 proven. 620 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:31:11,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244955040] [2022-11-16 12:31:11,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244955040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:31:11,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139087872] [2022-11-16 12:31:11,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:31:11,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:11,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:11,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:11,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:31:11,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:31:11,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:31:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:31:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-16 12:31:11,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-11-16 12:31:12,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139087872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:12,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:31:12,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 27 [2022-11-16 12:31:12,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561351923] [2022-11-16 12:31:12,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:12,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:31:12,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:12,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:31:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:31:12,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 104 [2022-11-16 12:31:12,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 360 transitions, 3878 flow. Second operand has 28 states, 28 states have (on average 71.96428571428571) internal successors, (2015), 28 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:12,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:31:12,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 104 [2022-11-16 12:31:12,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:31:34,104 INFO L130 PetriNetUnfolder]: 19704/53925 cut-off events. [2022-11-16 12:31:34,105 INFO L131 PetriNetUnfolder]: For 531731/536809 co-relation queries the response was YES. [2022-11-16 12:31:34,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212038 conditions, 53925 events. 19704/53925 cut-off events. For 531731/536809 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 672155 event pairs, 559 based on Foata normal form. 1343/50623 useless extension candidates. Maximal degree in co-relation 211921. Up to 9673 conditions per place. [2022-11-16 12:31:34,846 INFO L137 encePairwiseOnDemand]: 95/104 looper letters, 4613 selfloop transitions, 56 changer transitions 0/4745 dead transitions. [2022-11-16 12:31:34,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 4745 transitions, 74691 flow [2022-11-16 12:31:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:31:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-16 12:31:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2952 transitions. [2022-11-16 12:31:34,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7096153846153846 [2022-11-16 12:31:34,852 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2952 transitions. [2022-11-16 12:31:34,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2952 transitions. [2022-11-16 12:31:34,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:31:34,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2952 transitions. [2022-11-16 12:31:34,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 73.8) internal successors, (2952), 40 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:34,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 104.0) internal successors, (4264), 41 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:34,869 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 104.0) internal successors, (4264), 41 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:34,869 INFO L175 Difference]: Start difference. First operand has 258 places, 360 transitions, 3878 flow. Second operand 40 states and 2952 transitions. [2022-11-16 12:31:34,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 4745 transitions, 74691 flow [2022-11-16 12:31:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 4745 transitions, 67341 flow, removed 2963 selfloop flow, removed 15 redundant places. [2022-11-16 12:31:37,718 INFO L231 Difference]: Finished difference. Result has 282 places, 364 transitions, 3601 flow [2022-11-16 12:31:37,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3601, PETRI_PLACES=282, PETRI_TRANSITIONS=364} [2022-11-16 12:31:37,719 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 196 predicate places. [2022-11-16 12:31:37,719 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 364 transitions, 3601 flow [2022-11-16 12:31:37,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.96428571428571) internal successors, (2015), 28 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:37,720 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:31:37,720 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:31:37,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:31:37,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:31:37,926 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 12:31:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:31:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash -169701609, now seen corresponding path program 4 times [2022-11-16 12:31:37,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:31:37,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402314176] [2022-11-16 12:31:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:31:37,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:31:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:31:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:38,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:31:38,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402314176] [2022-11-16 12:31:38,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402314176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:31:38,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552100701] [2022-11-16 12:31:38,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:31:38,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:31:38,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:31:38,829 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:31:38,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb2ee5e3-8513-43de-a613-3ebcf687ef5d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:31:38,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:31:38,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:31:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:31:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:31:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:39,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:31:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 1661 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:31:40,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552100701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:31:40,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:31:40,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-16 12:31:40,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761408818] [2022-11-16 12:31:40,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:31:40,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:31:40,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:31:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:31:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:31:40,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 104 [2022-11-16 12:31:40,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 364 transitions, 3601 flow. Second operand has 49 states, 49 states have (on average 88.08163265306122) internal successors, (4316), 49 states have internal predecessors, (4316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:31:40,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:31:40,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 104 [2022-11-16 12:31:40,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand