./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/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_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/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_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- 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 11:13:15,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:13:15,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:13:15,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:13:16,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:13:16,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:13:16,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:13:16,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:13:16,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:13:16,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:13:16,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:13:16,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:13:16,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:13:16,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:13:16,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:13:16,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:13:16,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:13:16,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:13:16,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:13:16,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:13:16,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:13:16,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:13:16,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:13:16,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:13:16,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:13:16,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:13:16,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:13:16,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:13:16,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:13:16,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:13:16,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:13:16,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:13:16,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:13:16,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:13:16,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:13:16,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:13:16,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:13:16,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:13:16,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:13:16,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:13:16,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:13:16,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:13:16,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:13:16,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:13:16,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:13:16,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:13:16,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:13:16,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:13:16,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:13:16,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:13:16,127 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:13:16,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:13:16,128 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:13:16,128 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:13:16,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:13:16,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:13:16,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:13:16,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:13:16,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:13:16,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:13:16,130 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:13:16,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:13:16,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:13:16,131 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:13:16,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:13:16,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:13:16,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:13:16,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:13:16,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:13:16,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:13:16,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:13:16,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:13:16,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:13:16,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:13:16,135 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:13:16,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:13:16,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:13:16,136 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_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-16 11:13:16,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:13:16,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:13:16,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:13:16,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:13:16,464 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:13:16,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-16 11:13:16,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/data/c294d7b0d/9fab2389fdd74e77acf0b218b44d4c80/FLAG5b8a9574e [2022-11-16 11:13:17,002 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:13:17,003 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-16 11:13:17,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/data/c294d7b0d/9fab2389fdd74e77acf0b218b44d4c80/FLAG5b8a9574e [2022-11-16 11:13:17,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/data/c294d7b0d/9fab2389fdd74e77acf0b218b44d4c80 [2022-11-16 11:13:17,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:13:17,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:13:17,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:13:17,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:13:17,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:13:17,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17, skipping insertion in model container [2022-11-16 11:13:17,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:13:17,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:13:17,634 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_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-16 11:13:17,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:13:17,648 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:13:17,670 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_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-16 11:13:17,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:13:17,688 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:13:17,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17 WrapperNode [2022-11-16 11:13:17,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:13:17,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:13:17,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:13:17,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:13:17,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,730 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2022-11-16 11:13:17,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:13:17,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:13:17,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:13:17,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:13:17,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,789 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:13:17,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:13:17,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:13:17,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:13:17,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (1/1) ... [2022-11-16 11:13:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:13:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:17,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:13:17,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:13:17,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:13:17,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:13:17,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:13:17,876 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:13:17,876 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:13:17,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:13:17,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:13:17,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:13:17,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:13:17,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:13:17,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:13:17,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:13:17,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:13:17,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:13:17,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:13:17,879 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 11:13:17,978 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:13:17,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:13:18,374 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:13:18,610 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:13:18,618 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:13:18,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:13:18 BoogieIcfgContainer [2022-11-16 11:13:18,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:13:18,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:13:18,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:13:18,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:13:18,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:13:17" (1/3) ... [2022-11-16 11:13:18,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe1b312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:13:18, skipping insertion in model container [2022-11-16 11:13:18,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:17" (2/3) ... [2022-11-16 11:13:18,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe1b312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:13:18, skipping insertion in model container [2022-11-16 11:13:18,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:13:18" (3/3) ... [2022-11-16 11:13:18,635 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-16 11:13:18,644 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:13:18,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:13:18,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-16 11:13:18,671 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:13:18,789 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:13:18,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 304 flow [2022-11-16 11:13:18,911 INFO L130 PetriNetUnfolder]: 11/142 cut-off events. [2022-11-16 11:13:18,911 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:13:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 128 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-16 11:13:18,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 304 flow [2022-11-16 11:13:18,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 123 transitions, 255 flow [2022-11-16 11:13:18,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:13:18,941 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;@30e1fda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:13:18,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-16 11:13:18,963 INFO L130 PetriNetUnfolder]: 3/64 cut-off events. [2022-11-16 11:13:18,963 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:13:18,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:18,964 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] [2022-11-16 11:13:18,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash -91479810, now seen corresponding path program 1 times [2022-11-16 11:13:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:18,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479921542] [2022-11-16 11:13:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:18,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:19,380 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 11:13:19,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479921542] [2022-11-16 11:13:19,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479921542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:19,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:19,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626441564] [2022-11-16 11:13:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:19,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:19,428 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-16 11:13:19,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 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 11:13:19,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:19,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-16 11:13:19,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:19,661 INFO L130 PetriNetUnfolder]: 73/312 cut-off events. [2022-11-16 11:13:19,661 INFO L131 PetriNetUnfolder]: For 52/58 co-relation queries the response was YES. [2022-11-16 11:13:19,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 312 events. 73/312 cut-off events. For 52/58 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1152 event pairs, 46 based on Foata normal form. 28/222 useless extension candidates. Maximal degree in co-relation 164. Up to 82 conditions per place. [2022-11-16 11:13:19,666 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 42 selfloop transitions, 4 changer transitions 2/137 dead transitions. [2022-11-16 11:13:19,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 137 transitions, 384 flow [2022-11-16 11:13:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:13:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:13:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2022-11-16 11:13:19,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8402777777777778 [2022-11-16 11:13:19,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2022-11-16 11:13:19,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2022-11-16 11:13:19,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:19,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2022-11-16 11:13:19,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 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 11:13:19,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:19,745 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:19,747 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 255 flow. Second operand 5 states and 605 transitions. [2022-11-16 11:13:19,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 137 transitions, 384 flow [2022-11-16 11:13:19,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 137 transitions, 374 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:13:19,759 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 262 flow [2022-11-16 11:13:19,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2022-11-16 11:13:19,767 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 3 predicate places. [2022-11-16 11:13:19,768 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 262 flow [2022-11-16 11:13:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 0 states have call successors, (0), 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 11:13:19,769 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:19,769 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] [2022-11-16 11:13:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:13:19,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1957084932, now seen corresponding path program 1 times [2022-11-16 11:13:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:19,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519837979] [2022-11-16 11:13:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:19,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:20,098 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 11:13:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:20,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519837979] [2022-11-16 11:13:20,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519837979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:20,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:20,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:13:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592026817] [2022-11-16 11:13:20,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:20,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-11-16 11:13:20,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 11:13:20,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:20,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-11-16 11:13:20,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:20,294 INFO L130 PetriNetUnfolder]: 77/382 cut-off events. [2022-11-16 11:13:20,294 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-16 11:13:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 382 events. 77/382 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1576 event pairs, 28 based on Foata normal form. 14/276 useless extension candidates. Maximal degree in co-relation 302. Up to 102 conditions per place. [2022-11-16 11:13:20,297 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 20 selfloop transitions, 9 changer transitions 0/125 dead transitions. [2022-11-16 11:13:20,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 125 transitions, 337 flow [2022-11-16 11:13:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:13:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2022-11-16 11:13:20,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2022-11-16 11:13:20,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2022-11-16 11:13:20,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2022-11-16 11:13:20,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:20,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2022-11-16 11:13:20,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 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 11:13:20,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 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 11:13:20,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 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 11:13:20,303 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 262 flow. Second operand 3 states and 372 transitions. [2022-11-16 11:13:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 125 transitions, 337 flow [2022-11-16 11:13:20,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 125 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:13:20,308 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 320 flow [2022-11-16 11:13:20,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2022-11-16 11:13:20,309 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 4 predicate places. [2022-11-16 11:13:20,309 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 320 flow [2022-11-16 11:13:20,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 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 11:13:20,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:20,310 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, 1, 1] [2022-11-16 11:13:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:13:20,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1418594356, now seen corresponding path program 1 times [2022-11-16 11:13:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553447996] [2022-11-16 11:13:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:20,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:20,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553447996] [2022-11-16 11:13:20,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553447996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:20,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430668858] [2022-11-16 11:13:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:20,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:20,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:13:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:20,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:13:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:20,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430668858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:20,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:20,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:13:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017131262] [2022-11-16 11:13:20,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:13:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:20,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:13:20,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:13:20,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-16 11:13:20,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 320 flow. Second operand has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 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 11:13:20,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:20,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-16 11:13:20,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:21,318 INFO L130 PetriNetUnfolder]: 161/772 cut-off events. [2022-11-16 11:13:21,318 INFO L131 PetriNetUnfolder]: For 344/644 co-relation queries the response was YES. [2022-11-16 11:13:21,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 772 events. 161/772 cut-off events. For 344/644 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4120 event pairs, 65 based on Foata normal form. 3/540 useless extension candidates. Maximal degree in co-relation 568. Up to 133 conditions per place. [2022-11-16 11:13:21,326 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 113 selfloop transitions, 18 changer transitions 0/220 dead transitions. [2022-11-16 11:13:21,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 220 transitions, 946 flow [2022-11-16 11:13:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:13:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:13:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2076 transitions. [2022-11-16 11:13:21,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8009259259259259 [2022-11-16 11:13:21,331 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2076 transitions. [2022-11-16 11:13:21,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2076 transitions. [2022-11-16 11:13:21,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:21,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2076 transitions. [2022-11-16 11:13:21,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 115.33333333333333) internal successors, (2076), 18 states have internal predecessors, (2076), 0 states have call successors, (0), 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 11:13:21,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 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 11:13:21,345 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 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 11:13:21,345 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 320 flow. Second operand 18 states and 2076 transitions. [2022-11-16 11:13:21,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 220 transitions, 946 flow [2022-11-16 11:13:21,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 220 transitions, 896 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:13:21,352 INFO L231 Difference]: Finished difference. Result has 143 places, 133 transitions, 408 flow [2022-11-16 11:13:21,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=408, PETRI_PLACES=143, PETRI_TRANSITIONS=133} [2022-11-16 11:13:21,353 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 23 predicate places. [2022-11-16 11:13:21,354 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 133 transitions, 408 flow [2022-11-16 11:13:21,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 111.66666666666667) internal successors, (1340), 12 states have internal predecessors, (1340), 0 states have call successors, (0), 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 11:13:21,355 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:21,355 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, 1, 1] [2022-11-16 11:13:21,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:21,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:21,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1026751657, now seen corresponding path program 1 times [2022-11-16 11:13:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360178810] [2022-11-16 11:13:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:21,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:21,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360178810] [2022-11-16 11:13:21,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360178810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:21,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345032557] [2022-11-16 11:13:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:21,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:21,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:21,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:21,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:13:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:13:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:21,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:21,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345032557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:21,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:13:21,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:13:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842898692] [2022-11-16 11:13:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:21,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:13:21,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:13:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:13:21,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 144 [2022-11-16 11:13:21,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 133 transitions, 408 flow. Second operand has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 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 11:13:21,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:21,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 144 [2022-11-16 11:13:21,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:22,228 INFO L130 PetriNetUnfolder]: 161/768 cut-off events. [2022-11-16 11:13:22,228 INFO L131 PetriNetUnfolder]: For 167/317 co-relation queries the response was YES. [2022-11-16 11:13:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1406 conditions, 768 events. 161/768 cut-off events. For 167/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4104 event pairs, 65 based on Foata normal form. 4/517 useless extension candidates. Maximal degree in co-relation 1109. Up to 272 conditions per place. [2022-11-16 11:13:22,236 INFO L137 encePairwiseOnDemand]: 139/144 looper letters, 51 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2022-11-16 11:13:22,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 151 transitions, 579 flow [2022-11-16 11:13:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:13:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:13:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 809 transitions. [2022-11-16 11:13:22,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025793650793651 [2022-11-16 11:13:22,240 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 809 transitions. [2022-11-16 11:13:22,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 809 transitions. [2022-11-16 11:13:22,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:22,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 809 transitions. [2022-11-16 11:13:22,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 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 11:13:22,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 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 11:13:22,247 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 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 11:13:22,248 INFO L175 Difference]: Start difference. First operand has 143 places, 133 transitions, 408 flow. Second operand 7 states and 809 transitions. [2022-11-16 11:13:22,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 151 transitions, 579 flow [2022-11-16 11:13:22,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 151 transitions, 547 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-16 11:13:22,256 INFO L231 Difference]: Finished difference. Result has 139 places, 129 transitions, 371 flow [2022-11-16 11:13:22,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=139, PETRI_TRANSITIONS=129} [2022-11-16 11:13:22,259 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-11-16 11:13:22,259 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 129 transitions, 371 flow [2022-11-16 11:13:22,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.33333333333333) internal successors, (668), 6 states have internal predecessors, (668), 0 states have call successors, (0), 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 11:13:22,260 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:22,260 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, 1, 1, 1, 1] [2022-11-16 11:13:22,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:22,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1814544975, now seen corresponding path program 1 times [2022-11-16 11:13:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:22,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59081018] [2022-11-16 11:13:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:22,831 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 11:13:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59081018] [2022-11-16 11:13:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59081018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:22,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:22,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:13:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983387108] [2022-11-16 11:13:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:13:22,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:22,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:13:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:13:22,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 144 [2022-11-16 11:13:22,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 129 transitions, 371 flow. Second operand has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 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 11:13:22,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:22,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 144 [2022-11-16 11:13:22,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:23,337 INFO L130 PetriNetUnfolder]: 309/1090 cut-off events. [2022-11-16 11:13:23,338 INFO L131 PetriNetUnfolder]: For 241/241 co-relation queries the response was YES. [2022-11-16 11:13:23,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 1090 events. 309/1090 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6783 event pairs, 138 based on Foata normal form. 4/798 useless extension candidates. Maximal degree in co-relation 1696. Up to 399 conditions per place. [2022-11-16 11:13:23,346 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 55 selfloop transitions, 19 changer transitions 4/161 dead transitions. [2022-11-16 11:13:23,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 161 transitions, 617 flow [2022-11-16 11:13:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:13:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:13:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1174 transitions. [2022-11-16 11:13:23,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7411616161616161 [2022-11-16 11:13:23,350 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1174 transitions. [2022-11-16 11:13:23,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1174 transitions. [2022-11-16 11:13:23,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:23,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1174 transitions. [2022-11-16 11:13:23,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.72727272727273) internal successors, (1174), 11 states have internal predecessors, (1174), 0 states have call successors, (0), 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 11:13:23,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 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 11:13:23,358 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 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 11:13:23,359 INFO L175 Difference]: Start difference. First operand has 139 places, 129 transitions, 371 flow. Second operand 11 states and 1174 transitions. [2022-11-16 11:13:23,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 161 transitions, 617 flow [2022-11-16 11:13:23,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 161 transitions, 603 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:13:23,365 INFO L231 Difference]: Finished difference. Result has 150 places, 137 transitions, 460 flow [2022-11-16 11:13:23,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=460, PETRI_PLACES=150, PETRI_TRANSITIONS=137} [2022-11-16 11:13:23,369 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-11-16 11:13:23,369 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 137 transitions, 460 flow [2022-11-16 11:13:23,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.11111111111111) internal successors, (919), 9 states have internal predecessors, (919), 0 states have call successors, (0), 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 11:13:23,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:23,370 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, 1, 1, 1, 1] [2022-11-16 11:13:23,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:13:23,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:23,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1814544974, now seen corresponding path program 1 times [2022-11-16 11:13:23,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:23,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613578062] [2022-11-16 11:13:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:23,486 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 11:13:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:23,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613578062] [2022-11-16 11:13:23,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613578062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:23,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:23,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416961177] [2022-11-16 11:13:23,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:13:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:23,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:13:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:23,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 144 [2022-11-16 11:13:23,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 137 transitions, 460 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 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 11:13:23,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:23,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 144 [2022-11-16 11:13:23,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:23,706 INFO L130 PetriNetUnfolder]: 159/728 cut-off events. [2022-11-16 11:13:23,706 INFO L131 PetriNetUnfolder]: For 707/949 co-relation queries the response was YES. [2022-11-16 11:13:23,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 728 events. 159/728 cut-off events. For 707/949 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3627 event pairs, 78 based on Foata normal form. 42/610 useless extension candidates. Maximal degree in co-relation 1137. Up to 303 conditions per place. [2022-11-16 11:13:23,712 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 20 selfloop transitions, 4 changer transitions 0/131 dead transitions. [2022-11-16 11:13:23,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 131 transitions, 466 flow [2022-11-16 11:13:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:13:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:13:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2022-11-16 11:13:23,717 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8138888888888889 [2022-11-16 11:13:23,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2022-11-16 11:13:23,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2022-11-16 11:13:23,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:23,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2022-11-16 11:13:23,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 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 11:13:23,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:23,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:23,723 INFO L175 Difference]: Start difference. First operand has 150 places, 137 transitions, 460 flow. Second operand 5 states and 586 transitions. [2022-11-16 11:13:23,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 131 transitions, 466 flow [2022-11-16 11:13:23,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 131 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:13:23,733 INFO L231 Difference]: Finished difference. Result has 148 places, 131 transitions, 410 flow [2022-11-16 11:13:23,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=410, PETRI_PLACES=148, PETRI_TRANSITIONS=131} [2022-11-16 11:13:23,737 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 28 predicate places. [2022-11-16 11:13:23,737 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 131 transitions, 410 flow [2022-11-16 11:13:23,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 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 11:13:23,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:23,739 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:23,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:13:23,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash -650459216, now seen corresponding path program 1 times [2022-11-16 11:13:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:23,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503228177] [2022-11-16 11:13:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:23,821 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 11:13:23,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:23,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503228177] [2022-11-16 11:13:23,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503228177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:23,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:23,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:23,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765793048] [2022-11-16 11:13:23,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:23,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:23,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-11-16 11:13:23,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 131 transitions, 410 flow. Second operand has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 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 11:13:23,825 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:23,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-11-16 11:13:23,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:24,087 INFO L130 PetriNetUnfolder]: 264/1153 cut-off events. [2022-11-16 11:13:24,087 INFO L131 PetriNetUnfolder]: For 423/605 co-relation queries the response was YES. [2022-11-16 11:13:24,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2293 conditions, 1153 events. 264/1153 cut-off events. For 423/605 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7068 event pairs, 103 based on Foata normal form. 2/885 useless extension candidates. Maximal degree in co-relation 2240. Up to 263 conditions per place. [2022-11-16 11:13:24,095 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 20 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2022-11-16 11:13:24,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 140 transitions, 505 flow [2022-11-16 11:13:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:13:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:13:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2022-11-16 11:13:24,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8416666666666667 [2022-11-16 11:13:24,098 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2022-11-16 11:13:24,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2022-11-16 11:13:24,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:24,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2022-11-16 11:13:24,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 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 11:13:24,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:24,102 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:24,102 INFO L175 Difference]: Start difference. First operand has 148 places, 131 transitions, 410 flow. Second operand 5 states and 606 transitions. [2022-11-16 11:13:24,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 140 transitions, 505 flow [2022-11-16 11:13:24,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 140 transitions, 497 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:13:24,107 INFO L231 Difference]: Finished difference. Result has 150 places, 134 transitions, 457 flow [2022-11-16 11:13:24,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=150, PETRI_TRANSITIONS=134} [2022-11-16 11:13:24,108 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 30 predicate places. [2022-11-16 11:13:24,108 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 134 transitions, 457 flow [2022-11-16 11:13:24,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.25) internal successors, (473), 4 states have internal predecessors, (473), 0 states have call successors, (0), 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 11:13:24,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:24,109 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:24,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:13:24,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:24,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:24,110 INFO L85 PathProgramCache]: Analyzing trace with hash -650459218, now seen corresponding path program 1 times [2022-11-16 11:13:24,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:24,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614437286] [2022-11-16 11:13:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:24,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:24,401 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 11:13:24,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614437286] [2022-11-16 11:13:24,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614437286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:24,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:24,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:13:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896312497] [2022-11-16 11:13:24,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:24,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:13:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:13:24,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:13:24,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-11-16 11:13:24,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 134 transitions, 457 flow. Second operand has 10 states, 10 states have (on average 100.2) internal successors, (1002), 10 states have internal predecessors, (1002), 0 states have call successors, (0), 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 11:13:24,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:24,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-11-16 11:13:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:25,150 INFO L130 PetriNetUnfolder]: 531/1947 cut-off events. [2022-11-16 11:13:25,150 INFO L131 PetriNetUnfolder]: For 1480/1480 co-relation queries the response was YES. [2022-11-16 11:13:25,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1947 events. 531/1947 cut-off events. For 1480/1480 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 14073 event pairs, 208 based on Foata normal form. 16/1711 useless extension candidates. Maximal degree in co-relation 4080. Up to 681 conditions per place. [2022-11-16 11:13:25,163 INFO L137 encePairwiseOnDemand]: 132/144 looper letters, 73 selfloop transitions, 10 changer transitions 1/165 dead transitions. [2022-11-16 11:13:25,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 165 transitions, 745 flow [2022-11-16 11:13:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:13:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:13:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1054 transitions. [2022-11-16 11:13:25,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7319444444444444 [2022-11-16 11:13:25,166 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1054 transitions. [2022-11-16 11:13:25,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1054 transitions. [2022-11-16 11:13:25,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:25,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1054 transitions. [2022-11-16 11:13:25,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 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 11:13:25,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 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 11:13:25,173 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 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 11:13:25,173 INFO L175 Difference]: Start difference. First operand has 150 places, 134 transitions, 457 flow. Second operand 10 states and 1054 transitions. [2022-11-16 11:13:25,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 165 transitions, 745 flow [2022-11-16 11:13:25,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 165 transitions, 740 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:13:25,181 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 493 flow [2022-11-16 11:13:25,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=493, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2022-11-16 11:13:25,182 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 39 predicate places. [2022-11-16 11:13:25,182 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 493 flow [2022-11-16 11:13:25,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.2) internal successors, (1002), 10 states have internal predecessors, (1002), 0 states have call successors, (0), 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 11:13:25,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:25,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:25,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:13:25,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash -575646813, now seen corresponding path program 1 times [2022-11-16 11:13:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:25,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115477745] [2022-11-16 11:13:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:25,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:25,476 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 11:13:25,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115477745] [2022-11-16 11:13:25,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115477745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:25,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453587620] [2022-11-16 11:13:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:25,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:25,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:25,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:13:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:13:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:25,850 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 11:13:25,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:25,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453587620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:25,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:13:25,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-16 11:13:25,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326354690] [2022-11-16 11:13:25,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:13:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:25,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:13:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:13:25,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 144 [2022-11-16 11:13:25,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 493 flow. Second operand has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 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 11:13:25,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:25,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 144 [2022-11-16 11:13:25,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:26,299 INFO L130 PetriNetUnfolder]: 385/1323 cut-off events. [2022-11-16 11:13:26,299 INFO L131 PetriNetUnfolder]: For 1647/1647 co-relation queries the response was YES. [2022-11-16 11:13:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3295 conditions, 1323 events. 385/1323 cut-off events. For 1647/1647 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8505 event pairs, 17 based on Foata normal form. 116/1260 useless extension candidates. Maximal degree in co-relation 3158. Up to 339 conditions per place. [2022-11-16 11:13:26,307 INFO L137 encePairwiseOnDemand]: 131/144 looper letters, 27 selfloop transitions, 14 changer transitions 12/150 dead transitions. [2022-11-16 11:13:26,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 711 flow [2022-11-16 11:13:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:13:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:13:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1011 transitions. [2022-11-16 11:13:26,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7800925925925926 [2022-11-16 11:13:26,311 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1011 transitions. [2022-11-16 11:13:26,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1011 transitions. [2022-11-16 11:13:26,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:26,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1011 transitions. [2022-11-16 11:13:26,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 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 11:13:26,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 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 11:13:26,317 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 144.0) internal successors, (1440), 10 states have internal predecessors, (1440), 0 states have call successors, (0), 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 11:13:26,317 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 493 flow. Second operand 9 states and 1011 transitions. [2022-11-16 11:13:26,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 711 flow [2022-11-16 11:13:26,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 688 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-16 11:13:26,324 INFO L231 Difference]: Finished difference. Result has 156 places, 123 transitions, 437 flow [2022-11-16 11:13:26,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=437, PETRI_PLACES=156, PETRI_TRANSITIONS=123} [2022-11-16 11:13:26,325 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 36 predicate places. [2022-11-16 11:13:26,325 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 123 transitions, 437 flow [2022-11-16 11:13:26,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 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 11:13:26,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:26,326 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:26,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:26,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:26,532 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1035491038, now seen corresponding path program 1 times [2022-11-16 11:13:26,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020765833] [2022-11-16 11:13:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:26,740 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 11:13:26,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020765833] [2022-11-16 11:13:26,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020765833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:26,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:26,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:26,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525618736] [2022-11-16 11:13:26,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:26,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:13:26,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:26,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:13:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:26,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-11-16 11:13:26,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 123 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 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 11:13:26,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:26,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-11-16 11:13:26,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:27,000 INFO L130 PetriNetUnfolder]: 341/1221 cut-off events. [2022-11-16 11:13:27,000 INFO L131 PetriNetUnfolder]: For 2165/2453 co-relation queries the response was YES. [2022-11-16 11:13:27,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 1221 events. 341/1221 cut-off events. For 2165/2453 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6749 event pairs, 68 based on Foata normal form. 16/973 useless extension candidates. Maximal degree in co-relation 3132. Up to 339 conditions per place. [2022-11-16 11:13:27,010 INFO L137 encePairwiseOnDemand]: 137/144 looper letters, 34 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2022-11-16 11:13:27,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 136 transitions, 595 flow [2022-11-16 11:13:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:13:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:13:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2022-11-16 11:13:27,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7833333333333333 [2022-11-16 11:13:27,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2022-11-16 11:13:27,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2022-11-16 11:13:27,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:27,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2022-11-16 11:13:27,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 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 11:13:27,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:27,016 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 144.0) internal successors, (864), 6 states have internal predecessors, (864), 0 states have call successors, (0), 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 11:13:27,017 INFO L175 Difference]: Start difference. First operand has 156 places, 123 transitions, 437 flow. Second operand 5 states and 564 transitions. [2022-11-16 11:13:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 136 transitions, 595 flow [2022-11-16 11:13:27,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 136 transitions, 527 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-16 11:13:27,023 INFO L231 Difference]: Finished difference. Result has 140 places, 124 transitions, 421 flow [2022-11-16 11:13:27,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=140, PETRI_TRANSITIONS=124} [2022-11-16 11:13:27,025 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 20 predicate places. [2022-11-16 11:13:27,025 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 124 transitions, 421 flow [2022-11-16 11:13:27,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 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 11:13:27,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:27,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:13:27,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash 711723291, now seen corresponding path program 1 times [2022-11-16 11:13:27,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:27,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614243853] [2022-11-16 11:13:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:27,096 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 11:13:27,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614243853] [2022-11-16 11:13:27,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614243853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:27,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:27,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786729538] [2022-11-16 11:13:27,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:27,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:27,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-11-16 11:13:27,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 124 transitions, 421 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 11:13:27,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:27,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-11-16 11:13:27,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:27,245 INFO L130 PetriNetUnfolder]: 161/845 cut-off events. [2022-11-16 11:13:27,245 INFO L131 PetriNetUnfolder]: For 664/664 co-relation queries the response was YES. [2022-11-16 11:13:27,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 845 events. 161/845 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4055 event pairs, 48 based on Foata normal form. 0/737 useless extension candidates. Maximal degree in co-relation 1676. Up to 277 conditions per place. [2022-11-16 11:13:27,251 INFO L137 encePairwiseOnDemand]: 141/144 looper letters, 20 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-11-16 11:13:27,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 128 transitions, 477 flow [2022-11-16 11:13:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:13:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-16 11:13:27,253 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8541666666666666 [2022-11-16 11:13:27,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-16 11:13:27,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-16 11:13:27,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:27,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-16 11:13:27,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:27,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 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 11:13:27,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 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 11:13:27,256 INFO L175 Difference]: Start difference. First operand has 140 places, 124 transitions, 421 flow. Second operand 3 states and 369 transitions. [2022-11-16 11:13:27,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 128 transitions, 477 flow [2022-11-16 11:13:27,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 128 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:13:27,260 INFO L231 Difference]: Finished difference. Result has 139 places, 123 transitions, 400 flow [2022-11-16 11:13:27,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=139, PETRI_TRANSITIONS=123} [2022-11-16 11:13:27,262 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 19 predicate places. [2022-11-16 11:13:27,262 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 123 transitions, 400 flow [2022-11-16 11:13:27,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 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 11:13:27,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:27,263 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:13:27,263 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 11:13:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1633337218, now seen corresponding path program 2 times [2022-11-16 11:13:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:27,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204093187] [2022-11-16 11:13:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:27,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:27,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204093187] [2022-11-16 11:13:27,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204093187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:27,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70559035] [2022-11-16 11:13:27,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:13:27,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:27,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:13:27,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:13:27,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:27,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:13:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:13:27,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:13:27,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70559035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:27,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:27,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:13:27,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657774861] [2022-11-16 11:13:27,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:13:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:13:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:13:27,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 144 [2022-11-16 11:13:27,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 123 transitions, 400 flow. Second operand has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 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 11:13:27,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:27,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 144 [2022-11-16 11:13:27,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:28,636 INFO L130 PetriNetUnfolder]: 139/871 cut-off events. [2022-11-16 11:13:28,637 INFO L131 PetriNetUnfolder]: For 705/849 co-relation queries the response was YES. [2022-11-16 11:13:28,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 871 events. 139/871 cut-off events. For 705/849 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4162 event pairs, 42 based on Foata normal form. 2/759 useless extension candidates. Maximal degree in co-relation 1754. Up to 201 conditions per place. [2022-11-16 11:13:28,643 INFO L137 encePairwiseOnDemand]: 133/144 looper letters, 114 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2022-11-16 11:13:28,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 216 transitions, 1193 flow [2022-11-16 11:13:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:13:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 11:13:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2463 transitions. [2022-11-16 11:13:28,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7126736111111112 [2022-11-16 11:13:28,651 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2463 transitions. [2022-11-16 11:13:28,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2463 transitions. [2022-11-16 11:13:28,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:28,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2463 transitions. [2022-11-16 11:13:28,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.625) internal successors, (2463), 24 states have internal predecessors, (2463), 0 states have call successors, (0), 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 11:13:28,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 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 11:13:28,668 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 144.0) internal successors, (3600), 25 states have internal predecessors, (3600), 0 states have call successors, (0), 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 11:13:28,669 INFO L175 Difference]: Start difference. First operand has 139 places, 123 transitions, 400 flow. Second operand 24 states and 2463 transitions. [2022-11-16 11:13:28,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 216 transitions, 1193 flow [2022-11-16 11:13:28,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 216 transitions, 1183 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:13:28,675 INFO L231 Difference]: Finished difference. Result has 157 places, 127 transitions, 459 flow [2022-11-16 11:13:28,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=459, PETRI_PLACES=157, PETRI_TRANSITIONS=127} [2022-11-16 11:13:28,676 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 37 predicate places. [2022-11-16 11:13:28,677 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 127 transitions, 459 flow [2022-11-16 11:13:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 101.61111111111111) internal successors, (1829), 18 states have internal predecessors, (1829), 0 states have call successors, (0), 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 11:13:28,678 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:28,678 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:28,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:28,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:28,884 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1414798911, now seen corresponding path program 1 times [2022-11-16 11:13:28,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:28,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207869379] [2022-11-16 11:13:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:13:29,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:29,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207869379] [2022-11-16 11:13:29,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207869379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620687780] [2022-11-16 11:13:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:29,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:29,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:29,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:13:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:29,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:13:29,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:13:29,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620687780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:29,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:13:29,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-16 11:13:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318715514] [2022-11-16 11:13:29,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:29,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:29,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 144 [2022-11-16 11:13:29,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 127 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 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 11:13:29,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:29,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 144 [2022-11-16 11:13:29,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:29,544 INFO L130 PetriNetUnfolder]: 211/1423 cut-off events. [2022-11-16 11:13:29,544 INFO L131 PetriNetUnfolder]: For 1140/1284 co-relation queries the response was YES. [2022-11-16 11:13:29,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 1423 events. 211/1423 cut-off events. For 1140/1284 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8447 event pairs, 30 based on Foata normal form. 36/1309 useless extension candidates. Maximal degree in co-relation 464. Up to 285 conditions per place. [2022-11-16 11:13:29,552 INFO L137 encePairwiseOnDemand]: 138/144 looper letters, 19 selfloop transitions, 8 changer transitions 0/137 dead transitions. [2022-11-16 11:13:29,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 578 flow [2022-11-16 11:13:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:13:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:13:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2022-11-16 11:13:29,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8472222222222222 [2022-11-16 11:13:29,554 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2022-11-16 11:13:29,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2022-11-16 11:13:29,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:29,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2022-11-16 11:13:29,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 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 11:13:29,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 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 11:13:29,558 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 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 11:13:29,558 INFO L175 Difference]: Start difference. First operand has 157 places, 127 transitions, 459 flow. Second operand 4 states and 488 transitions. [2022-11-16 11:13:29,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 578 flow [2022-11-16 11:13:29,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 137 transitions, 520 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-11-16 11:13:29,562 INFO L231 Difference]: Finished difference. Result has 145 places, 133 transitions, 497 flow [2022-11-16 11:13:29,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=497, PETRI_PLACES=145, PETRI_TRANSITIONS=133} [2022-11-16 11:13:29,563 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 25 predicate places. [2022-11-16 11:13:29,563 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 133 transitions, 497 flow [2022-11-16 11:13:29,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.5) internal successors, (474), 4 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 11:13:29,564 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:29,564 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 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 11:13:29,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:29,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:29,770 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2140736127, now seen corresponding path program 1 times [2022-11-16 11:13:29,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:29,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878056463] [2022-11-16 11:13:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:13:29,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878056463] [2022-11-16 11:13:29,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878056463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:29,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:29,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787988982] [2022-11-16 11:13:29,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:29,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:29,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 144 [2022-11-16 11:13:29,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 133 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 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 11:13:29,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:29,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 144 [2022-11-16 11:13:29,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:30,453 INFO L130 PetriNetUnfolder]: 385/2641 cut-off events. [2022-11-16 11:13:30,454 INFO L131 PetriNetUnfolder]: For 3192/3192 co-relation queries the response was YES. [2022-11-16 11:13:30,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 2641 events. 385/2641 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 20419 event pairs, 66 based on Foata normal form. 96/2437 useless extension candidates. Maximal degree in co-relation 974. Up to 525 conditions per place. [2022-11-16 11:13:30,481 INFO L137 encePairwiseOnDemand]: 140/144 looper letters, 27 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2022-11-16 11:13:30,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 141 transitions, 641 flow [2022-11-16 11:13:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:13:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:13:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2022-11-16 11:13:30,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8420138888888888 [2022-11-16 11:13:30,483 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2022-11-16 11:13:30,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2022-11-16 11:13:30,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:30,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2022-11-16 11:13:30,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 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 11:13:30,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 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 11:13:30,487 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 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 11:13:30,487 INFO L175 Difference]: Start difference. First operand has 145 places, 133 transitions, 497 flow. Second operand 4 states and 485 transitions. [2022-11-16 11:13:30,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 141 transitions, 641 flow [2022-11-16 11:13:30,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 141 transitions, 634 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 11:13:30,493 INFO L231 Difference]: Finished difference. Result has 149 places, 134 transitions, 513 flow [2022-11-16 11:13:30,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=513, PETRI_PLACES=149, PETRI_TRANSITIONS=134} [2022-11-16 11:13:30,494 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 29 predicate places. [2022-11-16 11:13:30,494 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 134 transitions, 513 flow [2022-11-16 11:13:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 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 11:13:30,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:30,495 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 11:13:30,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:13:30,495 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:30,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:30,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1445128647, now seen corresponding path program 1 times [2022-11-16 11:13:30,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:30,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286874432] [2022-11-16 11:13:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:30,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286874432] [2022-11-16 11:13:30,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286874432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257895460] [2022-11-16 11:13:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:30,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:30,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:30,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:30,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:13:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:31,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:13:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:32,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257895460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:32,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:32,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 30 [2022-11-16 11:13:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015904666] [2022-11-16 11:13:32,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:32,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:13:32,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:32,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:13:32,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:13:32,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 144 [2022-11-16 11:13:32,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 134 transitions, 513 flow. Second operand has 30 states, 30 states have (on average 96.16666666666667) internal successors, (2885), 30 states have internal predecessors, (2885), 0 states have call successors, (0), 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 11:13:32,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:32,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 144 [2022-11-16 11:13:32,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:33,979 INFO L130 PetriNetUnfolder]: 648/2593 cut-off events. [2022-11-16 11:13:33,980 INFO L131 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-11-16 11:13:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7578 conditions, 2593 events. 648/2593 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 18061 event pairs, 345 based on Foata normal form. 82/2324 useless extension candidates. Maximal degree in co-relation 1378. Up to 1235 conditions per place. [2022-11-16 11:13:33,999 INFO L137 encePairwiseOnDemand]: 122/144 looper letters, 60 selfloop transitions, 21 changer transitions 53/207 dead transitions. [2022-11-16 11:13:33,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 207 transitions, 1065 flow [2022-11-16 11:13:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:13:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-16 11:13:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2836 transitions. [2022-11-16 11:13:34,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6791187739463601 [2022-11-16 11:13:34,004 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2836 transitions. [2022-11-16 11:13:34,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2836 transitions. [2022-11-16 11:13:34,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:34,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2836 transitions. [2022-11-16 11:13:34,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 97.79310344827586) internal successors, (2836), 29 states have internal predecessors, (2836), 0 states have call successors, (0), 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 11:13:34,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 144.0) internal successors, (4320), 30 states have internal predecessors, (4320), 0 states have call successors, (0), 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 11:13:34,019 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 144.0) internal successors, (4320), 30 states have internal predecessors, (4320), 0 states have call successors, (0), 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 11:13:34,019 INFO L175 Difference]: Start difference. First operand has 149 places, 134 transitions, 513 flow. Second operand 29 states and 2836 transitions. [2022-11-16 11:13:34,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 207 transitions, 1065 flow [2022-11-16 11:13:34,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 207 transitions, 1060 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-16 11:13:34,027 INFO L231 Difference]: Finished difference. Result has 190 places, 135 transitions, 648 flow [2022-11-16 11:13:34,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=648, PETRI_PLACES=190, PETRI_TRANSITIONS=135} [2022-11-16 11:13:34,028 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 70 predicate places. [2022-11-16 11:13:34,028 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 135 transitions, 648 flow [2022-11-16 11:13:34,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 96.16666666666667) internal successors, (2885), 30 states have internal predecessors, (2885), 0 states have call successors, (0), 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 11:13:34,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:34,029 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 11:13:34,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:34,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:34,235 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1635239813, now seen corresponding path program 2 times [2022-11-16 11:13:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:34,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963131126] [2022-11-16 11:13:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:13:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963131126] [2022-11-16 11:13:34,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963131126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734971289] [2022-11-16 11:13:34,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:13:34,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:34,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:34,638 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:34,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:13:34,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:13:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 11:13:34,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:35,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:13:35,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:13:35,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:13:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:36,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:38,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:13:38,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-16 11:13:38,062 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-16 11:13:38,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 144 [2022-11-16 11:13:38,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:13:38,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 95 [2022-11-16 11:13:38,086 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-16 11:13:38,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 96 [2022-11-16 11:13:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:38,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734971289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:38,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:38,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 22, 19] total 44 [2022-11-16 11:13:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88324984] [2022-11-16 11:13:38,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:13:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:38,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:13:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1470, Unknown=24, NotChecked=0, Total=1980 [2022-11-16 11:13:38,758 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 144 [2022-11-16 11:13:38,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 135 transitions, 648 flow. Second operand has 45 states, 45 states have (on average 75.88888888888889) internal successors, (3415), 45 states have internal predecessors, (3415), 0 states have call successors, (0), 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 11:13:38,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:38,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 144 [2022-11-16 11:13:38,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:41,965 INFO L130 PetriNetUnfolder]: 1369/4567 cut-off events. [2022-11-16 11:13:41,965 INFO L131 PetriNetUnfolder]: For 34124/34986 co-relation queries the response was YES. [2022-11-16 11:13:41,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20388 conditions, 4567 events. 1369/4567 cut-off events. For 34124/34986 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 37286 event pairs, 377 based on Foata normal form. 164/4189 useless extension candidates. Maximal degree in co-relation 12347. Up to 1325 conditions per place. [2022-11-16 11:13:42,069 INFO L137 encePairwiseOnDemand]: 115/144 looper letters, 99 selfloop transitions, 67 changer transitions 0/225 dead transitions. [2022-11-16 11:13:42,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 225 transitions, 1863 flow [2022-11-16 11:13:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:13:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-16 11:13:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2926 transitions. [2022-11-16 11:13:42,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2022-11-16 11:13:42,086 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2926 transitions. [2022-11-16 11:13:42,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2926 transitions. [2022-11-16 11:13:42,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:42,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2926 transitions. [2022-11-16 11:13:42,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 77.0) internal successors, (2926), 38 states have internal predecessors, (2926), 0 states have call successors, (0), 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 11:13:42,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 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 11:13:42,114 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 144.0) internal successors, (5616), 39 states have internal predecessors, (5616), 0 states have call successors, (0), 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 11:13:42,115 INFO L175 Difference]: Start difference. First operand has 190 places, 135 transitions, 648 flow. Second operand 38 states and 2926 transitions. [2022-11-16 11:13:42,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 225 transitions, 1863 flow [2022-11-16 11:13:42,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 225 transitions, 1693 flow, removed 66 selfloop flow, removed 18 redundant places. [2022-11-16 11:13:42,166 INFO L231 Difference]: Finished difference. Result has 205 places, 174 transitions, 1281 flow [2022-11-16 11:13:42,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1281, PETRI_PLACES=205, PETRI_TRANSITIONS=174} [2022-11-16 11:13:42,167 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 85 predicate places. [2022-11-16 11:13:42,167 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 174 transitions, 1281 flow [2022-11-16 11:13:42,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 75.88888888888889) internal successors, (3415), 45 states have internal predecessors, (3415), 0 states have call successors, (0), 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 11:13:42,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:42,169 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 11:13:42,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:13:42,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2052701280, now seen corresponding path program 1 times [2022-11-16 11:13:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:42,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80685540] [2022-11-16 11:13:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:42,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:13:42,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80685540] [2022-11-16 11:13:42,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80685540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926284820] [2022-11-16 11:13:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:42,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:42,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:42,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:13:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 11:13:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:43,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:44,287 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-16 11:13:44,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 56 [2022-11-16 11:13:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:45,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926284820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:45,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:45,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 33 [2022-11-16 11:13:45,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647983110] [2022-11-16 11:13:45,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:45,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:13:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:13:45,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:13:45,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 144 [2022-11-16 11:13:45,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 174 transitions, 1281 flow. Second operand has 34 states, 34 states have (on average 90.41176470588235) internal successors, (3074), 34 states have internal predecessors, (3074), 0 states have call successors, (0), 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 11:13:45,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:45,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 144 [2022-11-16 11:13:45,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:13:49,826 INFO L130 PetriNetUnfolder]: 3069/10291 cut-off events. [2022-11-16 11:13:49,826 INFO L131 PetriNetUnfolder]: For 149952/152414 co-relation queries the response was YES. [2022-11-16 11:13:49,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47609 conditions, 10291 events. 3069/10291 cut-off events. For 149952/152414 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 102255 event pairs, 610 based on Foata normal form. 808/10328 useless extension candidates. Maximal degree in co-relation 38171. Up to 3109 conditions per place. [2022-11-16 11:13:49,942 INFO L137 encePairwiseOnDemand]: 127/144 looper letters, 175 selfloop transitions, 122 changer transitions 0/369 dead transitions. [2022-11-16 11:13:49,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 369 transitions, 4102 flow [2022-11-16 11:13:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 11:13:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-16 11:13:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4133 transitions. [2022-11-16 11:13:49,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6378086419753086 [2022-11-16 11:13:49,952 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4133 transitions. [2022-11-16 11:13:49,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4133 transitions. [2022-11-16 11:13:49,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:13:49,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4133 transitions. [2022-11-16 11:13:49,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 91.84444444444445) internal successors, (4133), 45 states have internal predecessors, (4133), 0 states have call successors, (0), 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 11:13:49,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 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 11:13:49,980 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 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 11:13:49,980 INFO L175 Difference]: Start difference. First operand has 205 places, 174 transitions, 1281 flow. Second operand 45 states and 4133 transitions. [2022-11-16 11:13:49,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 369 transitions, 4102 flow [2022-11-16 11:13:50,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 369 transitions, 3797 flow, removed 125 selfloop flow, removed 17 redundant places. [2022-11-16 11:13:50,246 INFO L231 Difference]: Finished difference. Result has 246 places, 258 transitions, 2852 flow [2022-11-16 11:13:50,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2852, PETRI_PLACES=246, PETRI_TRANSITIONS=258} [2022-11-16 11:13:50,247 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 126 predicate places. [2022-11-16 11:13:50,247 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 258 transitions, 2852 flow [2022-11-16 11:13:50,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.41176470588235) internal successors, (3074), 34 states have internal predecessors, (3074), 0 states have call successors, (0), 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 11:13:50,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:13:50,249 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 11:13:50,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:50,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:13:50,449 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:13:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1105258056, now seen corresponding path program 2 times [2022-11-16 11:13:50,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913628176] [2022-11-16 11:13:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:55,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913628176] [2022-11-16 11:13:55,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913628176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706246789] [2022-11-16 11:13:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:13:55,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:55,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:55,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:13:55,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:13:55,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:13:55,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:13:55,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:13:56,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:56,870 INFO L321 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2022-11-16 11:13:56,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 61 [2022-11-16 11:13:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:13:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706246789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:13:58,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:13:58,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 6] total 40 [2022-11-16 11:13:58,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787684279] [2022-11-16 11:13:58,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:13:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:13:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:58,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:13:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:13:58,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-16 11:13:58,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 258 transitions, 2852 flow. Second operand has 41 states, 41 states have (on average 70.97560975609755) internal successors, (2910), 41 states have internal predecessors, (2910), 0 states have call successors, (0), 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 11:13:58,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:13:58,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-16 11:13:58,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:09,621 INFO L130 PetriNetUnfolder]: 6501/17844 cut-off events. [2022-11-16 11:14:09,621 INFO L131 PetriNetUnfolder]: For 333012/333667 co-relation queries the response was YES. [2022-11-16 11:14:09,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94018 conditions, 17844 events. 6501/17844 cut-off events. For 333012/333667 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 180095 event pairs, 498 based on Foata normal form. 387/17216 useless extension candidates. Maximal degree in co-relation 89117. Up to 4866 conditions per place. [2022-11-16 11:14:09,848 INFO L137 encePairwiseOnDemand]: 113/144 looper letters, 293 selfloop transitions, 162 changer transitions 5/513 dead transitions. [2022-11-16 11:14:09,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 513 transitions, 6657 flow [2022-11-16 11:14:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 11:14:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-16 11:14:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3777 transitions. [2022-11-16 11:14:09,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5044070512820513 [2022-11-16 11:14:09,879 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3777 transitions. [2022-11-16 11:14:09,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3777 transitions. [2022-11-16 11:14:09,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:09,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3777 transitions. [2022-11-16 11:14:09,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 72.63461538461539) internal successors, (3777), 52 states have internal predecessors, (3777), 0 states have call successors, (0), 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 11:14:09,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 144.0) internal successors, (7632), 53 states have internal predecessors, (7632), 0 states have call successors, (0), 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 11:14:09,905 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 144.0) internal successors, (7632), 53 states have internal predecessors, (7632), 0 states have call successors, (0), 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 11:14:09,905 INFO L175 Difference]: Start difference. First operand has 246 places, 258 transitions, 2852 flow. Second operand 52 states and 3777 transitions. [2022-11-16 11:14:09,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 513 transitions, 6657 flow [2022-11-16 11:14:11,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 513 transitions, 5611 flow, removed 325 selfloop flow, removed 21 redundant places. [2022-11-16 11:14:11,385 INFO L231 Difference]: Finished difference. Result has 298 places, 352 transitions, 4227 flow [2022-11-16 11:14:11,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=4227, PETRI_PLACES=298, PETRI_TRANSITIONS=352} [2022-11-16 11:14:11,387 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 178 predicate places. [2022-11-16 11:14:11,387 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 352 transitions, 4227 flow [2022-11-16 11:14:11,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 70.97560975609755) internal successors, (2910), 41 states have internal predecessors, (2910), 0 states have call successors, (0), 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 11:14:11,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:11,388 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 11:14:11,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:11,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:14:11,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:14:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1105258057, now seen corresponding path program 3 times [2022-11-16 11:14:11,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:11,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389236564] [2022-11-16 11:14:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:11,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:14:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:11,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389236564] [2022-11-16 11:14:11,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389236564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:11,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437936344] [2022-11-16 11:14:11,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:14:11,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:11,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:11,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:11,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:14:12,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:14:12,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:14:12,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:14:12,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:12,593 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 11:14:12,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-11-16 11:14:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:14:12,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437936344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:12,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:12,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-16 11:14:12,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23767172] [2022-11-16 11:14:12,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:12,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:14:12,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:14:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:14:12,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 144 [2022-11-16 11:14:12,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 352 transitions, 4227 flow. Second operand has 14 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 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 11:14:12,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:12,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 144 [2022-11-16 11:14:12,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:18,266 INFO L130 PetriNetUnfolder]: 5067/17558 cut-off events. [2022-11-16 11:14:18,266 INFO L131 PetriNetUnfolder]: For 479300/485560 co-relation queries the response was YES. [2022-11-16 11:14:18,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108584 conditions, 17558 events. 5067/17558 cut-off events. For 479300/485560 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 192527 event pairs, 1184 based on Foata normal form. 1333/17375 useless extension candidates. Maximal degree in co-relation 101775. Up to 5345 conditions per place. [2022-11-16 11:14:18,701 INFO L137 encePairwiseOnDemand]: 134/144 looper letters, 210 selfloop transitions, 153 changer transitions 0/474 dead transitions. [2022-11-16 11:14:18,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 474 transitions, 7455 flow [2022-11-16 11:14:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:14:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:14:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1977 transitions. [2022-11-16 11:14:18,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7627314814814815 [2022-11-16 11:14:18,705 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1977 transitions. [2022-11-16 11:14:18,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1977 transitions. [2022-11-16 11:14:18,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:18,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1977 transitions. [2022-11-16 11:14:18,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 109.83333333333333) internal successors, (1977), 18 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 11:14:18,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 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 11:14:18,714 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 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 11:14:18,714 INFO L175 Difference]: Start difference. First operand has 298 places, 352 transitions, 4227 flow. Second operand 18 states and 1977 transitions. [2022-11-16 11:14:18,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 474 transitions, 7455 flow [2022-11-16 11:14:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 474 transitions, 7092 flow, removed 155 selfloop flow, removed 24 redundant places. [2022-11-16 11:14:20,324 INFO L231 Difference]: Finished difference. Result has 300 places, 452 transitions, 6688 flow [2022-11-16 11:14:20,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6688, PETRI_PLACES=300, PETRI_TRANSITIONS=452} [2022-11-16 11:14:20,325 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 180 predicate places. [2022-11-16 11:14:20,325 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 452 transitions, 6688 flow [2022-11-16 11:14:20,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.28571428571429) internal successors, (1516), 14 states have internal predecessors, (1516), 0 states have call successors, (0), 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 11:14:20,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:20,326 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 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 11:14:20,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:20,526 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:14:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1524186091, now seen corresponding path program 1 times [2022-11-16 11:14:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:20,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931788096] [2022-11-16 11:14:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:14:20,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931788096] [2022-11-16 11:14:20,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931788096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674055355] [2022-11-16 11:14:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:20,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:20,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:20,775 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:20,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:14:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:14:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:21,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:21,892 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-11-16 11:14:21,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-16 11:14:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:22,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674055355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:22,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:22,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 28 [2022-11-16 11:14:22,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143244808] [2022-11-16 11:14:22,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:22,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:14:22,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:14:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:14:22,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 144 [2022-11-16 11:14:22,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 452 transitions, 6688 flow. Second operand has 29 states, 29 states have (on average 90.65517241379311) internal successors, (2629), 29 states have internal predecessors, (2629), 0 states have call successors, (0), 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 11:14:22,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:22,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 144 [2022-11-16 11:14:22,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:29,988 INFO L130 PetriNetUnfolder]: 5419/19927 cut-off events. [2022-11-16 11:14:29,989 INFO L131 PetriNetUnfolder]: For 614988/622796 co-relation queries the response was YES. [2022-11-16 11:14:30,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127885 conditions, 19927 events. 5419/19927 cut-off events. For 614988/622796 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 226166 event pairs, 1184 based on Foata normal form. 2299/20762 useless extension candidates. Maximal degree in co-relation 116704. Up to 5810 conditions per place. [2022-11-16 11:14:30,233 INFO L137 encePairwiseOnDemand]: 124/144 looper letters, 286 selfloop transitions, 239 changer transitions 0/601 dead transitions. [2022-11-16 11:14:30,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 601 transitions, 10842 flow [2022-11-16 11:14:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:14:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-16 11:14:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2955 transitions. [2022-11-16 11:14:30,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6412760416666666 [2022-11-16 11:14:30,238 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2955 transitions. [2022-11-16 11:14:30,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2955 transitions. [2022-11-16 11:14:30,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:30,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2955 transitions. [2022-11-16 11:14:30,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 92.34375) internal successors, (2955), 32 states have internal predecessors, (2955), 0 states have call successors, (0), 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 11:14:30,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 144.0) internal successors, (4752), 33 states have internal predecessors, (4752), 0 states have call successors, (0), 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 11:14:30,251 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 144.0) internal successors, (4752), 33 states have internal predecessors, (4752), 0 states have call successors, (0), 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 11:14:30,251 INFO L175 Difference]: Start difference. First operand has 300 places, 452 transitions, 6688 flow. Second operand 32 states and 2955 transitions. [2022-11-16 11:14:30,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 601 transitions, 10842 flow [2022-11-16 11:14:33,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 601 transitions, 8778 flow, removed 1012 selfloop flow, removed 1 redundant places. [2022-11-16 11:14:33,369 INFO L231 Difference]: Finished difference. Result has 335 places, 502 transitions, 7243 flow [2022-11-16 11:14:33,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7243, PETRI_PLACES=335, PETRI_TRANSITIONS=502} [2022-11-16 11:14:33,370 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 215 predicate places. [2022-11-16 11:14:33,370 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 502 transitions, 7243 flow [2022-11-16 11:14:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.65517241379311) internal successors, (2629), 29 states have internal predecessors, (2629), 0 states have call successors, (0), 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 11:14:33,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:33,371 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 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 11:14:33,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:14:33,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:33,571 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:14:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash -621246171, now seen corresponding path program 2 times [2022-11-16 11:14:33,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:33,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567424794] [2022-11-16 11:14:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:34,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567424794] [2022-11-16 11:14:34,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567424794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044185512] [2022-11-16 11:14:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:14:34,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:34,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:34,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:34,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:14:34,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:14:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:34,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 11:14:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:35,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:14:36,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:14:36,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:14:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:36,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:38,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:38,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2022-11-16 11:14:38,869 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-16 11:14:38,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 266 treesize of output 270 [2022-11-16 11:14:38,917 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-16 11:14:38,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 232 treesize of output 218 [2022-11-16 11:14:38,978 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-16 11:14:38,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 153 treesize of output 165 [2022-11-16 11:14:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:41,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044185512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:41,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:41,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 20] total 59 [2022-11-16 11:14:41,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844957591] [2022-11-16 11:14:41,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:41,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:14:41,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:41,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:14:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=2950, Unknown=30, NotChecked=0, Total=3540 [2022-11-16 11:14:41,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 144 [2022-11-16 11:14:41,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 502 transitions, 7243 flow. Second operand has 60 states, 60 states have (on average 75.56666666666666) internal successors, (4534), 60 states have internal predecessors, (4534), 0 states have call successors, (0), 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 11:14:41,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:14:41,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 144 [2022-11-16 11:14:41,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:14:55,250 INFO L130 PetriNetUnfolder]: 5651/24316 cut-off events. [2022-11-16 11:14:55,251 INFO L131 PetriNetUnfolder]: For 653840/658632 co-relation queries the response was YES. [2022-11-16 11:14:55,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131495 conditions, 24316 events. 5651/24316 cut-off events. For 653840/658632 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 299161 event pairs, 1188 based on Foata normal form. 2939/25735 useless extension candidates. Maximal degree in co-relation 123969. Up to 5989 conditions per place. [2022-11-16 11:14:55,568 INFO L137 encePairwiseOnDemand]: 118/144 looper letters, 337 selfloop transitions, 308 changer transitions 0/708 dead transitions. [2022-11-16 11:14:55,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 708 transitions, 11961 flow [2022-11-16 11:14:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:14:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-16 11:14:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3853 transitions. [2022-11-16 11:14:55,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5351388888888889 [2022-11-16 11:14:55,574 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3853 transitions. [2022-11-16 11:14:55,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3853 transitions. [2022-11-16 11:14:55,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:14:55,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3853 transitions. [2022-11-16 11:14:55,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 77.06) internal successors, (3853), 50 states have internal predecessors, (3853), 0 states have call successors, (0), 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 11:14:55,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 144.0) internal successors, (7344), 51 states have internal predecessors, (7344), 0 states have call successors, (0), 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 11:14:55,591 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 144.0) internal successors, (7344), 51 states have internal predecessors, (7344), 0 states have call successors, (0), 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 11:14:55,592 INFO L175 Difference]: Start difference. First operand has 335 places, 502 transitions, 7243 flow. Second operand 50 states and 3853 transitions. [2022-11-16 11:14:55,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 708 transitions, 11961 flow [2022-11-16 11:14:58,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 708 transitions, 11353 flow, removed 236 selfloop flow, removed 21 redundant places. [2022-11-16 11:14:58,520 INFO L231 Difference]: Finished difference. Result has 378 places, 554 transitions, 8941 flow [2022-11-16 11:14:58,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8941, PETRI_PLACES=378, PETRI_TRANSITIONS=554} [2022-11-16 11:14:58,521 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 258 predicate places. [2022-11-16 11:14:58,521 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 554 transitions, 8941 flow [2022-11-16 11:14:58,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 75.56666666666666) internal successors, (4534), 60 states have internal predecessors, (4534), 0 states have call successors, (0), 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 11:14:58,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:14:58,522 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 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 11:14:58,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 11:14:58,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:14:58,723 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:14:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:58,724 INFO L85 PathProgramCache]: Analyzing trace with hash 348087166, now seen corresponding path program 1 times [2022-11-16 11:14:58,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:58,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889887658] [2022-11-16 11:14:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:58,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889887658] [2022-11-16 11:15:00,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889887658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530743369] [2022-11-16 11:15:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:00,753 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:00,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:15:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:15:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:01,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:15:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:02,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:15:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:02,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:15:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:03,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:04,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:04,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-16 11:15:04,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:04,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 410 [2022-11-16 11:15:04,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:04,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 241 treesize of output 229 [2022-11-16 11:15:04,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:04,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 254 [2022-11-16 11:15:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:10,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530743369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:10,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:10,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 68 [2022-11-16 11:15:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245114638] [2022-11-16 11:15:10,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:10,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-16 11:15:10,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:10,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-16 11:15:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4286, Unknown=8, NotChecked=0, Total=4692 [2022-11-16 11:15:10,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-16 11:15:10,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 554 transitions, 8941 flow. Second operand has 69 states, 69 states have (on average 69.66666666666667) internal successors, (4807), 69 states have internal predecessors, (4807), 0 states have call successors, (0), 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 11:15:10,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:15:10,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-16 11:15:10,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:15:27,540 INFO L130 PetriNetUnfolder]: 10439/35249 cut-off events. [2022-11-16 11:15:27,540 INFO L131 PetriNetUnfolder]: For 849888/852654 co-relation queries the response was YES. [2022-11-16 11:15:28,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206040 conditions, 35249 events. 10439/35249 cut-off events. For 849888/852654 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 429176 event pairs, 2056 based on Foata normal form. 255/33458 useless extension candidates. Maximal degree in co-relation 199924. Up to 17368 conditions per place. [2022-11-16 11:15:28,350 INFO L137 encePairwiseOnDemand]: 107/144 looper letters, 510 selfloop transitions, 164 changer transitions 7/734 dead transitions. [2022-11-16 11:15:28,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 734 transitions, 13046 flow [2022-11-16 11:15:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:15:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-16 11:15:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3095 transitions. [2022-11-16 11:15:28,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48847853535353536 [2022-11-16 11:15:28,356 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3095 transitions. [2022-11-16 11:15:28,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3095 transitions. [2022-11-16 11:15:28,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:15:28,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3095 transitions. [2022-11-16 11:15:28,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 70.3409090909091) internal successors, (3095), 44 states have internal predecessors, (3095), 0 states have call successors, (0), 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 11:15:28,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 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 11:15:28,371 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 144.0) internal successors, (6480), 45 states have internal predecessors, (6480), 0 states have call successors, (0), 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 11:15:28,371 INFO L175 Difference]: Start difference. First operand has 378 places, 554 transitions, 8941 flow. Second operand 44 states and 3095 transitions. [2022-11-16 11:15:28,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 734 transitions, 13046 flow [2022-11-16 11:15:33,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 734 transitions, 12507 flow, removed 229 selfloop flow, removed 28 redundant places. [2022-11-16 11:15:34,006 INFO L231 Difference]: Finished difference. Result has 411 places, 669 transitions, 11102 flow [2022-11-16 11:15:34,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=8526, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11102, PETRI_PLACES=411, PETRI_TRANSITIONS=669} [2022-11-16 11:15:34,007 INFO L288 CegarLoopForPetriNet]: 120 programPoint places, 291 predicate places. [2022-11-16 11:15:34,007 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 669 transitions, 11102 flow [2022-11-16 11:15:34,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 69.66666666666667) internal successors, (4807), 69 states have internal predecessors, (4807), 0 states have call successors, (0), 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 11:15:34,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:15:34,008 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 11:15:34,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:34,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:34,209 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-16 11:15:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 459049991, now seen corresponding path program 2 times [2022-11-16 11:15:34,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:34,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69428277] [2022-11-16 11:15:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:34,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:36,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69428277] [2022-11-16 11:15:36,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69428277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:36,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991917107] [2022-11-16 11:15:36,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:36,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:36,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:36,198 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:36,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58ba45ff-2ea8-4fad-8075-92fa5a01a26b/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:15:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:15:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:36,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:15:36,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:37,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:15:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:38,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:15:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:38,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:15:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:39,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:40,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:40,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2022-11-16 11:15:40,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:40,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 410 [2022-11-16 11:15:40,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:40,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 342 treesize of output 292 [2022-11-16 11:15:40,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:40,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 266 treesize of output 254 [2022-11-16 11:15:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:45,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991917107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:45,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:45,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 68 [2022-11-16 11:15:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248888875] [2022-11-16 11:15:45,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:45,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-16 11:15:45,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-16 11:15:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=4306, Unknown=11, NotChecked=0, Total=4692 [2022-11-16 11:15:45,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2022-11-16 11:15:45,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 669 transitions, 11102 flow. Second operand has 69 states, 69 states have (on average 69.71014492753623) internal successors, (4810), 69 states have internal predecessors, (4810), 0 states have call successors, (0), 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 11:15:45,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:15:45,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2022-11-16 11:15:45,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand