./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:54:21,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:54:21,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:54:21,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:54:21,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:54:21,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:54:21,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:54:21,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:54:21,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:54:21,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:54:21,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:54:21,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:54:21,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:54:21,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:54:21,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:54:21,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:54:21,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:54:21,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:54:21,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:54:21,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:54:21,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:54:21,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:54:21,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:54:21,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:54:21,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:54:21,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:54:21,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:54:21,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:54:21,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:54:21,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:54:21,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:54:21,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:54:21,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:54:21,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:54:21,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:54:21,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:54:21,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:54:21,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:54:21,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:54:21,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:54:21,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:54:21,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-12-13 16:54:21,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:54:21,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:54:21,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:54:21,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:54:21,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:54:21,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:54:21,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:54:21,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:54:21,444 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:54:21,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:54:21,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:54:21,445 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:54:21,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:54:21,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:54:21,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:54:21,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:54:21,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:54:21,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:54:21,446 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-13 16:54:21,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:54:21,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:54:21,447 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:54:21,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:54:21,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:54:21,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:54:21,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:54:21,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:54:21,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:54:21,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:54:21,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:54:21,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:54:21,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:54:21,449 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:54:21,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:54:21,450 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:54:21,450 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:54:21,450 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:54:21,450 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2022-12-13 16:54:21,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:54:21,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:54:21,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:54:21,652 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:54:21,653 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:54:21,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-12-13 16:54:24,269 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:54:24,405 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:54:24,406 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2022-12-13 16:54:24,411 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/data/8045b80b2/da11a15b5a534cf293f2acc600380376/FLAG98133a653 [2022-12-13 16:54:24,424 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/data/8045b80b2/da11a15b5a534cf293f2acc600380376 [2022-12-13 16:54:24,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:54:24,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:54:24,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:54:24,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:54:24,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:54:24,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48330ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24, skipping insertion in model container [2022-12-13 16:54:24,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:54:24,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:54:24,574 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:54:24,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:54:24,578 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:54:24,580 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:54:24,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:54:24,583 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:54:24,590 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-12-13 16:54:24,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:54:24,604 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:54:24,614 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:54:24,615 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:54:24,615 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:54:24,616 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:54:24,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:54:24,617 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:54:24,620 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2022-12-13 16:54:24,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:54:24,633 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:54:24,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24 WrapperNode [2022-12-13 16:54:24,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:54:24,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:54:24,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:54:24,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:54:24,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,661 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 175 [2022-12-13 16:54:24,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:54:24,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:54:24,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:54:24,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:54:24,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,679 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:54:24,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:54:24,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:54:24,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:54:24,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (1/1) ... [2022-12-13 16:54:24,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:54:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:24,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:54:24,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:54:24,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:54:24,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:54:24,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:54:24,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:54:24,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:54:24,741 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:54:24,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:54:24,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:54:24,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:54:24,743 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 16:54:24,828 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:54:24,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:54:25,073 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:54:25,172 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:54:25,172 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 16:54:25,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:54:25 BoogieIcfgContainer [2022-12-13 16:54:25,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:54:25,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:54:25,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:54:25,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:54:25,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:54:24" (1/3) ... [2022-12-13 16:54:25,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4492a624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:54:25, skipping insertion in model container [2022-12-13 16:54:25,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:54:24" (2/3) ... [2022-12-13 16:54:25,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4492a624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:54:25, skipping insertion in model container [2022-12-13 16:54:25,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:54:25" (3/3) ... [2022-12-13 16:54:25,181 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2022-12-13 16:54:25,188 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:54:25,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:54:25,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-12-13 16:54:25,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:54:25,253 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:54:25,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 162 transitions, 340 flow [2022-12-13 16:54:25,331 INFO L130 PetriNetUnfolder]: 11/160 cut-off events. [2022-12-13 16:54:25,331 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 16:54:25,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 11/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-12-13 16:54:25,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 162 transitions, 340 flow [2022-12-13 16:54:25,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 141 transitions, 291 flow [2022-12-13 16:54:25,342 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:54:25,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 141 transitions, 291 flow [2022-12-13 16:54:25,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 141 transitions, 291 flow [2022-12-13 16:54:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 141 transitions, 291 flow [2022-12-13 16:54:25,377 INFO L130 PetriNetUnfolder]: 10/141 cut-off events. [2022-12-13 16:54:25,377 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 16:54:25,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 141 events. 10/141 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2022-12-13 16:54:25,379 INFO L119 LiptonReduction]: Number of co-enabled transitions 1350 [2022-12-13 16:54:30,408 INFO L134 LiptonReduction]: Checked pairs total: 1794 [2022-12-13 16:54:30,409 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-12-13 16:54:30,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:54:30,430 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;@7b3ab11a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:54:30,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2022-12-13 16:54:30,433 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 16:54:30,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:54:30,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:30,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 16:54:30,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash 23969, now seen corresponding path program 1 times [2022-12-13 16:54:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:30,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666197281] [2022-12-13 16:54:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:30,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666197281] [2022-12-13 16:54:30,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666197281] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:30,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:30,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:30,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142110059] [2022-12-13 16:54:30,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:30,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:30,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:30,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2022-12-13 16:54:30,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:30,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:30,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2022-12-13 16:54:30,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:30,909 INFO L130 PetriNetUnfolder]: 435/661 cut-off events. [2022-12-13 16:54:30,910 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 16:54:30,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 661 events. 435/661 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 2996 event pairs, 244 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 617. Up to 332 conditions per place. [2022-12-13 16:54:30,914 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 41 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2022-12-13 16:54:30,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 192 flow [2022-12-13 16:54:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-12-13 16:54:30,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2022-12-13 16:54:30,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-12-13 16:54:30,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-12-13 16:54:30,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:30,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-12-13 16:54:30,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:30,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:30,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:30,936 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 63 flow. Second operand 3 states and 462 transitions. [2022-12-13 16:54:30,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 192 flow [2022-12-13 16:54:30,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:54:30,940 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 66 flow [2022-12-13 16:54:30,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-12-13 16:54:30,945 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2022-12-13 16:54:30,945 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 66 flow [2022-12-13 16:54:30,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:30,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:30,946 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:54:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:54:30,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 743944, now seen corresponding path program 1 times [2022-12-13 16:54:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:30,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124056573] [2022-12-13 16:54:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:31,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124056573] [2022-12-13 16:54:31,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124056573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:31,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:31,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:54:31,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876695582] [2022-12-13 16:54:31,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:31,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2022-12-13 16:54:31,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:31,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2022-12-13 16:54:31,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:31,143 INFO L130 PetriNetUnfolder]: 435/660 cut-off events. [2022-12-13 16:54:31,144 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-13 16:54:31,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 660 events. 435/660 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3014 event pairs, 244 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 676. Up to 658 conditions per place. [2022-12-13 16:54:31,148 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-12-13 16:54:31,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 108 flow [2022-12-13 16:54:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2022-12-13 16:54:31,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44650205761316875 [2022-12-13 16:54:31,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2022-12-13 16:54:31,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2022-12-13 16:54:31,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:31,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2022-12-13 16:54:31,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,157 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 66 flow. Second operand 3 states and 434 transitions. [2022-12-13 16:54:31,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 108 flow [2022-12-13 16:54:31,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:31,158 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 62 flow [2022-12-13 16:54:31,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-12-13 16:54:31,159 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2022-12-13 16:54:31,159 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 62 flow [2022-12-13 16:54:31,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:31,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 16:54:31,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:54:31,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 743950, now seen corresponding path program 1 times [2022-12-13 16:54:31,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:31,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20309499] [2022-12-13 16:54:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:31,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:31,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20309499] [2022-12-13 16:54:31,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20309499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:31,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754249063] [2022-12-13 16:54:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:31,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:31,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:31,226 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:31,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:54:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:31,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:54:31,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:31,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754249063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:31,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:31,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 16:54:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255269888] [2022-12-13 16:54:31,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:31,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:31,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:54:31,341 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 324 [2022-12-13 16:54:31,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:31,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 324 [2022-12-13 16:54:31,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:31,671 INFO L130 PetriNetUnfolder]: 1086/1647 cut-off events. [2022-12-13 16:54:31,671 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-12-13 16:54:31,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1647 events. 1086/1647 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 8783 event pairs, 610 based on Foata normal form. 0/650 useless extension candidates. Maximal degree in co-relation 3368. Up to 331 conditions per place. [2022-12-13 16:54:31,680 INFO L137 encePairwiseOnDemand]: 321/324 looper letters, 97 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-12-13 16:54:31,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 103 transitions, 446 flow [2022-12-13 16:54:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:54:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:54:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2022-12-13 16:54:31,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2022-12-13 16:54:31,683 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2022-12-13 16:54:31,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2022-12-13 16:54:31,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:31,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2022-12-13 16:54:31,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,688 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,688 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 62 flow. Second operand 6 states and 927 transitions. [2022-12-13 16:54:31,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 103 transitions, 446 flow [2022-12-13 16:54:31,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 103 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:31,689 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 97 flow [2022-12-13 16:54:31,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2022-12-13 16:54:31,690 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2022-12-13 16:54:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 97 flow [2022-12-13 16:54:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:31,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:31,690 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:54:31,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:54:31,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:31,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash 715237013, now seen corresponding path program 1 times [2022-12-13 16:54:31,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:31,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075493317] [2022-12-13 16:54:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:31,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:32,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075493317] [2022-12-13 16:54:32,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075493317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:32,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:32,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:54:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908303029] [2022-12-13 16:54:32,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:32,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:32,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-12-13 16:54:32,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:32,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-12-13 16:54:32,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:32,360 INFO L130 PetriNetUnfolder]: 1226/2127 cut-off events. [2022-12-13 16:54:32,360 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 16:54:32,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 2127 events. 1226/2127 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 12734 event pairs, 615 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 4384. Up to 1328 conditions per place. [2022-12-13 16:54:32,370 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-12-13 16:54:32,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 214 flow [2022-12-13 16:54:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2022-12-13 16:54:32,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4670781893004115 [2022-12-13 16:54:32,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2022-12-13 16:54:32,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2022-12-13 16:54:32,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:32,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2022-12-13 16:54:32,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,377 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,377 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 97 flow. Second operand 3 states and 454 transitions. [2022-12-13 16:54:32,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 214 flow [2022-12-13 16:54:32,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 206 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:32,379 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 103 flow [2022-12-13 16:54:32,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2022-12-13 16:54:32,380 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2022-12-13 16:54:32,380 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 103 flow [2022-12-13 16:54:32,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:32,381 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 16:54:32,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:54:32,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash 715236916, now seen corresponding path program 1 times [2022-12-13 16:54:32,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:32,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563878037] [2022-12-13 16:54:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:32,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:32,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:32,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563878037] [2022-12-13 16:54:32,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563878037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:32,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:32,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:54:32,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359855665] [2022-12-13 16:54:32,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:32,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:54:32,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:54:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:54:32,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 324 [2022-12-13 16:54:32,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:32,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 324 [2022-12-13 16:54:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:32,697 INFO L130 PetriNetUnfolder]: 902/1580 cut-off events. [2022-12-13 16:54:32,698 INFO L131 PetriNetUnfolder]: For 149/206 co-relation queries the response was YES. [2022-12-13 16:54:32,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1580 events. 902/1580 cut-off events. For 149/206 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 9397 event pairs, 749 based on Foata normal form. 71/931 useless extension candidates. Maximal degree in co-relation 3539. Up to 1567 conditions per place. [2022-12-13 16:54:32,703 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2022-12-13 16:54:32,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 184 flow [2022-12-13 16:54:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:54:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:54:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 574 transitions. [2022-12-13 16:54:32,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44290123456790126 [2022-12-13 16:54:32,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 574 transitions. [2022-12-13 16:54:32,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 574 transitions. [2022-12-13 16:54:32,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:32,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 574 transitions. [2022-12-13 16:54:32,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,711 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,711 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 103 flow. Second operand 4 states and 574 transitions. [2022-12-13 16:54:32,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 184 flow [2022-12-13 16:54:32,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:32,713 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 127 flow [2022-12-13 16:54:32,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2022-12-13 16:54:32,714 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2022-12-13 16:54:32,714 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 127 flow [2022-12-13 16:54:32,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:32,717 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:54:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:54:32,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:32,717 INFO L85 PathProgramCache]: Analyzing trace with hash 689175661, now seen corresponding path program 1 times [2022-12-13 16:54:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:32,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272794841] [2022-12-13 16:54:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272794841] [2022-12-13 16:54:32,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272794841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623132785] [2022-12-13 16:54:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:32,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:32,810 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:32,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:54:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:54:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:32,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:32,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623132785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:32,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:32,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2022-12-13 16:54:32,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162955878] [2022-12-13 16:54:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:32,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:32,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:54:32,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-12-13 16:54:32,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:32,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:32,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-12-13 16:54:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:33,025 INFO L130 PetriNetUnfolder]: 493/875 cut-off events. [2022-12-13 16:54:33,025 INFO L131 PetriNetUnfolder]: For 243/283 co-relation queries the response was YES. [2022-12-13 16:54:33,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 875 events. 493/875 cut-off events. For 243/283 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4526 event pairs, 380 based on Foata normal form. 40/619 useless extension candidates. Maximal degree in co-relation 2412. Up to 871 conditions per place. [2022-12-13 16:54:33,030 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 23 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-12-13 16:54:33,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 25 transitions, 163 flow [2022-12-13 16:54:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2022-12-13 16:54:33,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.448559670781893 [2022-12-13 16:54:33,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2022-12-13 16:54:33,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2022-12-13 16:54:33,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:33,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2022-12-13 16:54:33,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,036 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 127 flow. Second operand 3 states and 436 transitions. [2022-12-13 16:54:33,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 25 transitions, 163 flow [2022-12-13 16:54:33,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 25 transitions, 157 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 16:54:33,038 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 111 flow [2022-12-13 16:54:33,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2022-12-13 16:54:33,038 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2022-12-13 16:54:33,039 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 111 flow [2022-12-13 16:54:33,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:33,039 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 16:54:33,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:54:33,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 16:54:33,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash 688897895, now seen corresponding path program 2 times [2022-12-13 16:54:33,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45627015] [2022-12-13 16:54:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:33,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45627015] [2022-12-13 16:54:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45627015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788254967] [2022-12-13 16:54:33,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:33,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:33,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:33,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:33,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:54:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:54:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:54:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:54:33,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:33,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788254967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:33,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:33,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2022-12-13 16:54:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019615691] [2022-12-13 16:54:33,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:33,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:54:33,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-12-13 16:54:33,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:33,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-12-13 16:54:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:33,525 INFO L130 PetriNetUnfolder]: 493/874 cut-off events. [2022-12-13 16:54:33,525 INFO L131 PetriNetUnfolder]: For 244/284 co-relation queries the response was YES. [2022-12-13 16:54:33,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 874 events. 493/874 cut-off events. For 244/284 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4515 event pairs, 380 based on Foata normal form. 41/619 useless extension candidates. Maximal degree in co-relation 2404. Up to 870 conditions per place. [2022-12-13 16:54:33,530 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-12-13 16:54:33,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 147 flow [2022-12-13 16:54:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2022-12-13 16:54:33,533 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4454732510288066 [2022-12-13 16:54:33,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2022-12-13 16:54:33,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2022-12-13 16:54:33,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:33,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2022-12-13 16:54:33,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,537 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 111 flow. Second operand 3 states and 433 transitions. [2022-12-13 16:54:33,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 147 flow [2022-12-13 16:54:33,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 24 transitions, 136 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-12-13 16:54:33,538 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 92 flow [2022-12-13 16:54:33,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2022-12-13 16:54:33,539 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-12-13 16:54:33,539 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 92 flow [2022-12-13 16:54:33,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:33,540 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:33,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:54:33,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:33,741 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:33,741 INFO L85 PathProgramCache]: Analyzing trace with hash -110386131, now seen corresponding path program 1 times [2022-12-13 16:54:33,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:33,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290898609] [2022-12-13 16:54:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:33,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290898609] [2022-12-13 16:54:33,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290898609] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:33,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:33,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:54:33,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674223653] [2022-12-13 16:54:33,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:33,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:33,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-12-13 16:54:33,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:33,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-12-13 16:54:33,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:33,922 INFO L130 PetriNetUnfolder]: 493/870 cut-off events. [2022-12-13 16:54:33,922 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-12-13 16:54:33,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 870 events. 493/870 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4473 event pairs, 16 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 2391. Up to 788 conditions per place. [2022-12-13 16:54:33,924 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2022-12-13 16:54:33,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 176 flow [2022-12-13 16:54:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-12-13 16:54:33,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2022-12-13 16:54:33,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-12-13 16:54:33,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-12-13 16:54:33,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:33,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-12-13 16:54:33,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,928 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 92 flow. Second operand 3 states and 441 transitions. [2022-12-13 16:54:33,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 176 flow [2022-12-13 16:54:33,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:33,929 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 89 flow [2022-12-13 16:54:33,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2022-12-13 16:54:33,930 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2022-12-13 16:54:33,930 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 89 flow [2022-12-13 16:54:33,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:33,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:33,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:33,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:54:33,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:33,931 INFO L85 PathProgramCache]: Analyzing trace with hash -110386113, now seen corresponding path program 1 times [2022-12-13 16:54:33,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:33,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243315058] [2022-12-13 16:54:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:33,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:33,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:33,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243315058] [2022-12-13 16:54:33,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243315058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:33,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290747734] [2022-12-13 16:54:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:33,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:33,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:54:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:34,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:54:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:34,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:34,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290747734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:34,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:34,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:54:34,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198462284] [2022-12-13 16:54:34,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:34,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:34,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:54:34,070 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-12-13 16:54:34,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:34,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-12-13 16:54:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:34,328 INFO L130 PetriNetUnfolder]: 1021/1806 cut-off events. [2022-12-13 16:54:34,328 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2022-12-13 16:54:34,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4948 conditions, 1806 events. 1021/1806 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10270 event pairs, 228 based on Foata normal form. 0/1350 useless extension candidates. Maximal degree in co-relation 4935. Up to 833 conditions per place. [2022-12-13 16:54:34,335 INFO L137 encePairwiseOnDemand]: 321/324 looper letters, 65 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 16:54:34,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 70 transitions, 381 flow [2022-12-13 16:54:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:54:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:54:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 897 transitions. [2022-12-13 16:54:34,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46141975308641975 [2022-12-13 16:54:34,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 897 transitions. [2022-12-13 16:54:34,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 897 transitions. [2022-12-13 16:54:34,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:34,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 897 transitions. [2022-12-13 16:54:34,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.5) internal successors, (897), 6 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,341 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,341 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 89 flow. Second operand 6 states and 897 transitions. [2022-12-13 16:54:34,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 70 transitions, 381 flow [2022-12-13 16:54:34,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 70 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:34,342 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 124 flow [2022-12-13 16:54:34,342 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=124, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2022-12-13 16:54:34,343 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2022-12-13 16:54:34,343 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 124 flow [2022-12-13 16:54:34,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.71428571428572) internal successors, (978), 7 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:34,344 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:34,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:54:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:34,545 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 877759705, now seen corresponding path program 1 times [2022-12-13 16:54:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:34,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94150801] [2022-12-13 16:54:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:34,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:34,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94150801] [2022-12-13 16:54:34,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94150801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:34,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:54:34,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 16:54:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428994874] [2022-12-13 16:54:34,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:34,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:54:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:54:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:54:34,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2022-12-13 16:54:34,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:34,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2022-12-13 16:54:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:34,792 INFO L130 PetriNetUnfolder]: 885/1602 cut-off events. [2022-12-13 16:54:34,792 INFO L131 PetriNetUnfolder]: For 1204/1236 co-relation queries the response was YES. [2022-12-13 16:54:34,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4815 conditions, 1602 events. 885/1602 cut-off events. For 1204/1236 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8902 event pairs, 316 based on Foata normal form. 40/1274 useless extension candidates. Maximal degree in co-relation 4799. Up to 1561 conditions per place. [2022-12-13 16:54:34,797 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 27 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2022-12-13 16:54:34,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 198 flow [2022-12-13 16:54:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:54:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:54:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2022-12-13 16:54:34,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44753086419753085 [2022-12-13 16:54:34,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2022-12-13 16:54:34,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2022-12-13 16:54:34,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:34,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2022-12-13 16:54:34,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,803 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 124 flow. Second operand 3 states and 435 transitions. [2022-12-13 16:54:34,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 198 flow [2022-12-13 16:54:34,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 190 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 16:54:34,807 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 139 flow [2022-12-13 16:54:34,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2022-12-13 16:54:34,807 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2022-12-13 16:54:34,807 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 139 flow [2022-12-13 16:54:34,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:34,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:34,808 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:34,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:54:34,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:34,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1713345844, now seen corresponding path program 1 times [2022-12-13 16:54:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:34,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076152195] [2022-12-13 16:54:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:34,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:35,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076152195] [2022-12-13 16:54:35,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076152195] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:35,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282858103] [2022-12-13 16:54:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:35,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:35,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:35,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:35,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:54:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:54:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:35,293 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 [2022-12-13 16:54:35,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:35,365 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 18 treesize of output 20 [2022-12-13 16:54:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:35,424 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 18 treesize of output 20 [2022-12-13 16:54:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:35,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:35,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:35,753 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 29 treesize of output 30 [2022-12-13 16:54:35,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:35,764 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 79 treesize of output 75 [2022-12-13 16:54:35,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-12-13 16:54:35,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-12-13 16:54:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:35,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282858103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:35,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:35,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-12-13 16:54:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635993334] [2022-12-13 16:54:35,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:54:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:35,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:54:35,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:54:36,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 324 [2022-12-13 16:54:36,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 139 flow. Second operand has 19 states, 19 states have (on average 108.42105263157895) internal successors, (2060), 19 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:36,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:36,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 324 [2022-12-13 16:54:36,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:38,658 INFO L130 PetriNetUnfolder]: 1478/2619 cut-off events. [2022-12-13 16:54:38,658 INFO L131 PetriNetUnfolder]: For 2105/2143 co-relation queries the response was YES. [2022-12-13 16:54:38,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8956 conditions, 2619 events. 1478/2619 cut-off events. For 2105/2143 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16074 event pairs, 396 based on Foata normal form. 40/1993 useless extension candidates. Maximal degree in co-relation 8937. Up to 1644 conditions per place. [2022-12-13 16:54:38,671 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 108 selfloop transitions, 59 changer transitions 2/170 dead transitions. [2022-12-13 16:54:38,671 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 170 transitions, 1174 flow [2022-12-13 16:54:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 16:54:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 16:54:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2292 transitions. [2022-12-13 16:54:38,676 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3537037037037037 [2022-12-13 16:54:38,676 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2292 transitions. [2022-12-13 16:54:38,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2292 transitions. [2022-12-13 16:54:38,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:38,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2292 transitions. [2022-12-13 16:54:38,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 114.6) internal successors, (2292), 20 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,689 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 324.0) internal successors, (6804), 21 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,689 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 139 flow. Second operand 20 states and 2292 transitions. [2022-12-13 16:54:38,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 170 transitions, 1174 flow [2022-12-13 16:54:38,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 170 transitions, 1053 flow, removed 55 selfloop flow, removed 2 redundant places. [2022-12-13 16:54:38,695 INFO L231 Difference]: Finished difference. Result has 70 places, 91 transitions, 694 flow [2022-12-13 16:54:38,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=694, PETRI_PLACES=70, PETRI_TRANSITIONS=91} [2022-12-13 16:54:38,696 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2022-12-13 16:54:38,696 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 91 transitions, 694 flow [2022-12-13 16:54:38,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 108.42105263157895) internal successors, (2060), 19 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:38,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:38,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:38,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:54:38,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:38,897 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:38,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:38,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1399202299, now seen corresponding path program 1 times [2022-12-13 16:54:38,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:38,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682057667] [2022-12-13 16:54:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:38,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:39,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682057667] [2022-12-13 16:54:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682057667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033536167] [2022-12-13 16:54:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:39,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:39,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:39,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:39,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:54:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:39,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:54:39,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:39,615 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 [2022-12-13 16:54:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:39,668 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 [2022-12-13 16:54:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:39,731 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 [2022-12-13 16:54:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:39,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:40,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:40,007 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 31 treesize of output 32 [2022-12-13 16:54:40,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:40,016 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 89 treesize of output 85 [2022-12-13 16:54:40,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-12-13 16:54:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 16:54:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:40,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033536167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:40,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:40,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2022-12-13 16:54:40,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377620759] [2022-12-13 16:54:40,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:40,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:54:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:40,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:54:40,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2022-12-13 16:54:40,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:54:40,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 91 transitions, 694 flow. Second operand has 20 states, 20 states have (on average 98.35) internal successors, (1967), 20 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:40,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:40,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:54:40,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:42,607 INFO L130 PetriNetUnfolder]: 1560/2867 cut-off events. [2022-12-13 16:54:42,607 INFO L131 PetriNetUnfolder]: For 12435/12477 co-relation queries the response was YES. [2022-12-13 16:54:42,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13679 conditions, 2867 events. 1560/2867 cut-off events. For 12435/12477 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19095 event pairs, 406 based on Foata normal form. 42/2457 useless extension candidates. Maximal degree in co-relation 13649. Up to 2036 conditions per place. [2022-12-13 16:54:42,618 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 118 selfloop transitions, 75 changer transitions 0/194 dead transitions. [2022-12-13 16:54:42,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 194 transitions, 1884 flow [2022-12-13 16:54:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:54:42,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:54:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1965 transitions. [2022-12-13 16:54:42,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31920077972709554 [2022-12-13 16:54:42,622 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1965 transitions. [2022-12-13 16:54:42,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1965 transitions. [2022-12-13 16:54:42,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:42,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1965 transitions. [2022-12-13 16:54:42,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 103.42105263157895) internal successors, (1965), 19 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 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) [2022-12-13 16:54:42,633 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 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) [2022-12-13 16:54:42,633 INFO L175 Difference]: Start difference. First operand has 70 places, 91 transitions, 694 flow. Second operand 19 states and 1965 transitions. [2022-12-13 16:54:42,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 194 transitions, 1884 flow [2022-12-13 16:54:42,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 194 transitions, 1848 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-12-13 16:54:42,682 INFO L231 Difference]: Finished difference. Result has 90 places, 120 transitions, 1232 flow [2022-12-13 16:54:42,683 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1232, PETRI_PLACES=90, PETRI_TRANSITIONS=120} [2022-12-13 16:54:42,683 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 59 predicate places. [2022-12-13 16:54:42,683 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 120 transitions, 1232 flow [2022-12-13 16:54:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.35) internal successors, (1967), 20 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:42,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:42,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:42,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:54:42,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:54:42,886 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1675785876, now seen corresponding path program 1 times [2022-12-13 16:54:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:42,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664974191] [2022-12-13 16:54:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:42,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664974191] [2022-12-13 16:54:43,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664974191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:43,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918720488] [2022-12-13 16:54:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:43,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:43,216 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:54:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:54:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:43,308 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 [2022-12-13 16:54:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:43,354 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 [2022-12-13 16:54:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:43,401 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 [2022-12-13 16:54:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:43,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:43,682 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 31 treesize of output 32 [2022-12-13 16:54:43,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:43,690 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 89 treesize of output 85 [2022-12-13 16:54:43,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-12-13 16:54:43,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-12-13 16:54:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:43,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918720488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:43,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:43,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-12-13 16:54:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969349050] [2022-12-13 16:54:43,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:43,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:54:43,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:54:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:54:44,635 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 324 [2022-12-13 16:54:44,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 120 transitions, 1232 flow. Second operand has 19 states, 19 states have (on average 115.42105263157895) internal successors, (2193), 19 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:44,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:44,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 324 [2022-12-13 16:54:44,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:47,188 INFO L130 PetriNetUnfolder]: 2141/3697 cut-off events. [2022-12-13 16:54:47,188 INFO L131 PetriNetUnfolder]: For 25571/25613 co-relation queries the response was YES. [2022-12-13 16:54:47,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21339 conditions, 3697 events. 2141/3697 cut-off events. For 25571/25613 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23502 event pairs, 437 based on Foata normal form. 158/3429 useless extension candidates. Maximal degree in co-relation 21303. Up to 2449 conditions per place. [2022-12-13 16:54:47,214 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 208 selfloop transitions, 122 changer transitions 9/340 dead transitions. [2022-12-13 16:54:47,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 340 transitions, 3864 flow [2022-12-13 16:54:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 16:54:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 16:54:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3424 transitions. [2022-12-13 16:54:47,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37742504409171074 [2022-12-13 16:54:47,219 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3424 transitions. [2022-12-13 16:54:47,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3424 transitions. [2022-12-13 16:54:47,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:47,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3424 transitions. [2022-12-13 16:54:47,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 122.28571428571429) internal successors, (3424), 28 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:47,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:47,243 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:47,243 INFO L175 Difference]: Start difference. First operand has 90 places, 120 transitions, 1232 flow. Second operand 28 states and 3424 transitions. [2022-12-13 16:54:47,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 340 transitions, 3864 flow [2022-12-13 16:54:47,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 340 transitions, 3499 flow, removed 148 selfloop flow, removed 7 redundant places. [2022-12-13 16:54:47,337 INFO L231 Difference]: Finished difference. Result has 121 places, 196 transitions, 2099 flow [2022-12-13 16:54:47,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2099, PETRI_PLACES=121, PETRI_TRANSITIONS=196} [2022-12-13 16:54:47,338 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 90 predicate places. [2022-12-13 16:54:47,338 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 196 transitions, 2099 flow [2022-12-13 16:54:47,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 115.42105263157895) internal successors, (2193), 19 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:47,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:47,339 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:47,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:54:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:47,541 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1711503421, now seen corresponding path program 1 times [2022-12-13 16:54:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:47,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228137637] [2022-12-13 16:54:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:47,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228137637] [2022-12-13 16:54:47,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228137637] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:47,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020855457] [2022-12-13 16:54:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:47,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:47,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:47,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:47,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:54:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:54:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:48,002 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 [2022-12-13 16:54:48,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:48,047 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 18 treesize of output 20 [2022-12-13 16:54:48,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:48,089 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 18 treesize of output 20 [2022-12-13 16:54:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:48,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:48,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:48,362 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 29 treesize of output 30 [2022-12-13 16:54:48,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:54:48,371 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 157 treesize of output 145 [2022-12-13 16:54:48,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-12-13 16:54:48,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-12-13 16:54:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:48,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020855457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:48,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:48,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2022-12-13 16:54:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576650085] [2022-12-13 16:54:48,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:48,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:54:48,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:48,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:54:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=281, Unknown=1, NotChecked=0, Total=342 [2022-12-13 16:54:49,240 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:54:49,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 196 transitions, 2099 flow. Second operand has 19 states, 19 states have (on average 98.42105263157895) internal successors, (1870), 19 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:49,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:49,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:54:49,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:51,840 INFO L130 PetriNetUnfolder]: 2262/3938 cut-off events. [2022-12-13 16:54:51,840 INFO L131 PetriNetUnfolder]: For 29427/29469 co-relation queries the response was YES. [2022-12-13 16:54:51,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24085 conditions, 3938 events. 2262/3938 cut-off events. For 29427/29469 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25845 event pairs, 413 based on Foata normal form. 146/3794 useless extension candidates. Maximal degree in co-relation 24037. Up to 2208 conditions per place. [2022-12-13 16:54:51,858 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 169 selfloop transitions, 145 changer transitions 20/335 dead transitions. [2022-12-13 16:54:51,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 335 transitions, 4059 flow [2022-12-13 16:54:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 16:54:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 16:54:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2811 transitions. [2022-12-13 16:54:51,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3213305898491084 [2022-12-13 16:54:51,862 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2811 transitions. [2022-12-13 16:54:51,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2811 transitions. [2022-12-13 16:54:51,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:51,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2811 transitions. [2022-12-13 16:54:51,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 104.11111111111111) internal successors, (2811), 27 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:51,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:51,874 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 324.0) internal successors, (9072), 28 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:51,874 INFO L175 Difference]: Start difference. First operand has 121 places, 196 transitions, 2099 flow. Second operand 27 states and 2811 transitions. [2022-12-13 16:54:51,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 335 transitions, 4059 flow [2022-12-13 16:54:51,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 335 transitions, 3933 flow, removed 50 selfloop flow, removed 7 redundant places. [2022-12-13 16:54:51,990 INFO L231 Difference]: Finished difference. Result has 143 places, 211 transitions, 2609 flow [2022-12-13 16:54:51,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2609, PETRI_PLACES=143, PETRI_TRANSITIONS=211} [2022-12-13 16:54:51,991 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2022-12-13 16:54:51,991 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 211 transitions, 2609 flow [2022-12-13 16:54:51,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 98.42105263157895) internal successors, (1870), 19 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:51,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:51,992 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:51,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 16:54:52,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:52,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:52,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1401973699, now seen corresponding path program 2 times [2022-12-13 16:54:52,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:52,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381811311] [2022-12-13 16:54:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:52,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381811311] [2022-12-13 16:54:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381811311] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405055102] [2022-12-13 16:54:52,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:52,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:52,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:52,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:52,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:54:52,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:54:52,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:54:52,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:52,808 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 18 treesize of output 20 [2022-12-13 16:54:52,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:52,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:52,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405055102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:52,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:52,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-12-13 16:54:52,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423734281] [2022-12-13 16:54:52,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:52,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:54:52,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-12-13 16:54:52,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 211 transitions, 2609 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:52,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:52,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-12-13 16:54:52,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:53,577 INFO L130 PetriNetUnfolder]: 2193/3812 cut-off events. [2022-12-13 16:54:53,577 INFO L131 PetriNetUnfolder]: For 30212/30250 co-relation queries the response was YES. [2022-12-13 16:54:53,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25263 conditions, 3812 events. 2193/3812 cut-off events. For 30212/30250 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24632 event pairs, 543 based on Foata normal form. 58/3608 useless extension candidates. Maximal degree in co-relation 25214. Up to 3677 conditions per place. [2022-12-13 16:54:53,596 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 205 selfloop transitions, 18 changer transitions 6/230 dead transitions. [2022-12-13 16:54:53,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 230 transitions, 3179 flow [2022-12-13 16:54:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:54:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:54:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 655 transitions. [2022-12-13 16:54:53,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2022-12-13 16:54:53,597 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 655 transitions. [2022-12-13 16:54:53,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 655 transitions. [2022-12-13 16:54:53,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:53,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 655 transitions. [2022-12-13 16:54:53,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:53,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:53,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:53,599 INFO L175 Difference]: Start difference. First operand has 143 places, 211 transitions, 2609 flow. Second operand 5 states and 655 transitions. [2022-12-13 16:54:53,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 230 transitions, 3179 flow [2022-12-13 16:54:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 230 transitions, 2931 flow, removed 59 selfloop flow, removed 12 redundant places. [2022-12-13 16:54:53,657 INFO L231 Difference]: Finished difference. Result has 131 places, 211 transitions, 2424 flow [2022-12-13 16:54:53,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2424, PETRI_PLACES=131, PETRI_TRANSITIONS=211} [2022-12-13 16:54:53,658 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2022-12-13 16:54:53,658 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 211 transitions, 2424 flow [2022-12-13 16:54:53,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:53,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:53,658 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:53,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:54:53,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:53,858 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:53,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:53,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1401973757, now seen corresponding path program 2 times [2022-12-13 16:54:53,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:53,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157383132] [2022-12-13 16:54:53,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:53,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:54,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157383132] [2022-12-13 16:54:54,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157383132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012920115] [2022-12-13 16:54:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:54,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:54,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:54,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:54:54,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:54:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:54:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:54,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:54,291 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 18 treesize of output 20 [2022-12-13 16:54:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:54,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:54,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012920115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:54,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:54,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-12-13 16:54:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762158720] [2022-12-13 16:54:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:54,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:54,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:54:54,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-12-13 16:54:54,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 211 transitions, 2424 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:54,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:54,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-12-13 16:54:54,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:55,032 INFO L130 PetriNetUnfolder]: 2156/3742 cut-off events. [2022-12-13 16:54:55,032 INFO L131 PetriNetUnfolder]: For 28997/29035 co-relation queries the response was YES. [2022-12-13 16:54:55,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23890 conditions, 3742 events. 2156/3742 cut-off events. For 28997/29035 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24121 event pairs, 531 based on Foata normal form. 50/3538 useless extension candidates. Maximal degree in co-relation 23843. Up to 3626 conditions per place. [2022-12-13 16:54:55,049 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 198 selfloop transitions, 10 changer transitions 12/221 dead transitions. [2022-12-13 16:54:55,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 221 transitions, 2879 flow [2022-12-13 16:54:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:54:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:54:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 650 transitions. [2022-12-13 16:54:55,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4012345679012346 [2022-12-13 16:54:55,050 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 650 transitions. [2022-12-13 16:54:55,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 650 transitions. [2022-12-13 16:54:55,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:55,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 650 transitions. [2022-12-13 16:54:55,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:55,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:55,052 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:55,052 INFO L175 Difference]: Start difference. First operand has 131 places, 211 transitions, 2424 flow. Second operand 5 states and 650 transitions. [2022-12-13 16:54:55,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 221 transitions, 2879 flow [2022-12-13 16:54:55,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 221 transitions, 2821 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-12-13 16:54:55,107 INFO L231 Difference]: Finished difference. Result has 131 places, 201 transitions, 2260 flow [2022-12-13 16:54:55,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2260, PETRI_PLACES=131, PETRI_TRANSITIONS=201} [2022-12-13 16:54:55,107 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 100 predicate places. [2022-12-13 16:54:55,107 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 201 transitions, 2260 flow [2022-12-13 16:54:55,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:55,108 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:55,108 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:55,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:54:55,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:54:55,309 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1490601055, now seen corresponding path program 1 times [2022-12-13 16:54:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:55,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489740261] [2022-12-13 16:54:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:55,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489740261] [2022-12-13 16:54:55,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489740261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649475979] [2022-12-13 16:54:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:55,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:55,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:55,405 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:55,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:54:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:55,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:54:55,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:54:55,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:54:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:54:55,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649475979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:54:55,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:54:55,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-12-13 16:54:55,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22706655] [2022-12-13 16:54:55,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:54:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 16:54:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 16:54:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:54:55,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-12-13 16:54:55,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 201 transitions, 2260 flow. Second operand has 14 states, 14 states have (on average 129.85714285714286) internal successors, (1818), 14 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:55,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:55,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-12-13 16:54:55,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:56,338 INFO L130 PetriNetUnfolder]: 1523/2616 cut-off events. [2022-12-13 16:54:56,338 INFO L131 PetriNetUnfolder]: For 20261/20261 co-relation queries the response was YES. [2022-12-13 16:54:56,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2616 events. 1523/2616 cut-off events. For 20261/20261 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15085 event pairs, 268 based on Foata normal form. 125/2537 useless extension candidates. Maximal degree in co-relation 16507. Up to 1226 conditions per place. [2022-12-13 16:54:56,350 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 249 selfloop transitions, 38 changer transitions 8/295 dead transitions. [2022-12-13 16:54:56,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 295 transitions, 3615 flow [2022-12-13 16:54:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:54:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:54:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1637 transitions. [2022-12-13 16:54:56,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4210390946502058 [2022-12-13 16:54:56,352 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1637 transitions. [2022-12-13 16:54:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1637 transitions. [2022-12-13 16:54:56,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:56,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1637 transitions. [2022-12-13 16:54:56,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 136.41666666666666) internal successors, (1637), 12 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:56,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:56,356 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 324.0) internal successors, (4212), 13 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:56,356 INFO L175 Difference]: Start difference. First operand has 131 places, 201 transitions, 2260 flow. Second operand 12 states and 1637 transitions. [2022-12-13 16:54:56,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 295 transitions, 3615 flow [2022-12-13 16:54:56,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 295 transitions, 3348 flow, removed 67 selfloop flow, removed 11 redundant places. [2022-12-13 16:54:56,396 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 1272 flow [2022-12-13 16:54:56,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1272, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2022-12-13 16:54:56,397 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2022-12-13 16:54:56,397 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 1272 flow [2022-12-13 16:54:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.85714285714286) internal successors, (1818), 14 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:56,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:56,397 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:56,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:54:56,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:54:56,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1432449950, now seen corresponding path program 2 times [2022-12-13 16:54:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213350222] [2022-12-13 16:54:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:56,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213350222] [2022-12-13 16:54:56,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213350222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:56,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974355505] [2022-12-13 16:54:56,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:56,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:56,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:56,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:54:56,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:54:56,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:54:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:57,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:57,021 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 18 treesize of output 20 [2022-12-13 16:54:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:57,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:57,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974355505] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:57,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:57,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-12-13 16:54:57,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895373198] [2022-12-13 16:54:57,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:57,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:57,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:54:57,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-12-13 16:54:57,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 1272 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:57,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:57,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-12-13 16:54:57,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:57,597 INFO L130 PetriNetUnfolder]: 1596/2727 cut-off events. [2022-12-13 16:54:57,598 INFO L131 PetriNetUnfolder]: For 26925/26961 co-relation queries the response was YES. [2022-12-13 16:54:57,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16561 conditions, 2727 events. 1596/2727 cut-off events. For 26925/26961 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15766 event pairs, 82 based on Foata normal form. 344/2733 useless extension candidates. Maximal degree in co-relation 16528. Up to 1664 conditions per place. [2022-12-13 16:54:57,617 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 98 selfloop transitions, 32 changer transitions 2/134 dead transitions. [2022-12-13 16:54:57,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 134 transitions, 1738 flow [2022-12-13 16:54:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:54:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:54:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 660 transitions. [2022-12-13 16:54:57,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2022-12-13 16:54:57,619 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 660 transitions. [2022-12-13 16:54:57,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 660 transitions. [2022-12-13 16:54:57,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:57,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 660 transitions. [2022-12-13 16:54:57,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:57,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:57,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:57,623 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 1272 flow. Second operand 5 states and 660 transitions. [2022-12-13 16:54:57,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 134 transitions, 1738 flow [2022-12-13 16:54:57,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 1606 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-12-13 16:54:57,680 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 1198 flow [2022-12-13 16:54:57,680 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1198, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2022-12-13 16:54:57,680 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 71 predicate places. [2022-12-13 16:54:57,681 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 1198 flow [2022-12-13 16:54:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:57,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:57,681 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:57,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 16:54:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:54:57,882 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1432449892, now seen corresponding path program 2 times [2022-12-13 16:54:57,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:57,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708084129] [2022-12-13 16:54:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:57,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:54:58,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:58,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708084129] [2022-12-13 16:54:58,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708084129] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:58,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338681556] [2022-12-13 16:54:58,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:54:58,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:58,238 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:58,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:54:58,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:54:58,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:54:58,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:54:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:58,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:54:58,343 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 18 treesize of output 20 [2022-12-13 16:54:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:58,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:58,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338681556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:58,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:58,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-12-13 16:54:58,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73046794] [2022-12-13 16:54:58,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:58,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:54:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:54:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:54:58,470 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 324 [2022-12-13 16:54:58,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 1198 flow. Second operand has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:58,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:58,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 324 [2022-12-13 16:54:58,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:58,926 INFO L130 PetriNetUnfolder]: 1450/2517 cut-off events. [2022-12-13 16:54:58,926 INFO L131 PetriNetUnfolder]: For 22956/22992 co-relation queries the response was YES. [2022-12-13 16:54:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 2517 events. 1450/2517 cut-off events. For 22956/22992 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14571 event pairs, 82 based on Foata normal form. 100/2439 useless extension candidates. Maximal degree in co-relation 16251. Up to 1454 conditions per place. [2022-12-13 16:54:58,938 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 91 selfloop transitions, 28 changer transitions 2/123 dead transitions. [2022-12-13 16:54:58,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 123 transitions, 1580 flow [2022-12-13 16:54:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:54:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 16:54:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 657 transitions. [2022-12-13 16:54:58,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2022-12-13 16:54:58,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 657 transitions. [2022-12-13 16:54:58,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 657 transitions. [2022-12-13 16:54:58,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:58,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 657 transitions. [2022-12-13 16:54:58,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:58,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:58,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 324.0) internal successors, (1944), 6 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:58,942 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 1198 flow. Second operand 5 states and 657 transitions. [2022-12-13 16:54:58,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 123 transitions, 1580 flow [2022-12-13 16:54:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 123 transitions, 1511 flow, removed 29 selfloop flow, removed 3 redundant places. [2022-12-13 16:54:58,973 INFO L231 Difference]: Finished difference. Result has 101 places, 98 transitions, 1093 flow [2022-12-13 16:54:58,973 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1093, PETRI_PLACES=101, PETRI_TRANSITIONS=98} [2022-12-13 16:54:58,973 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 70 predicate places. [2022-12-13 16:54:58,973 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 98 transitions, 1093 flow [2022-12-13 16:54:58,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.28571428571429) internal successors, (870), 7 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:58,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:58,974 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:58,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:54:59,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:59,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:54:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:54:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 429380435, now seen corresponding path program 1 times [2022-12-13 16:54:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:54:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12517032] [2022-12-13 16:54:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:54:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:59,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:54:59,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12517032] [2022-12-13 16:54:59,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12517032] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:54:59,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151417424] [2022-12-13 16:54:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:54:59,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:54:59,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:54:59,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:54:59,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:54:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:54:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 16:54:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:54:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:54:59,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:54:59,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151417424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:54:59,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:54:59,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2022-12-13 16:54:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433103996] [2022-12-13 16:54:59,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:54:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:54:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:54:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:54:59,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:54:59,356 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 324 [2022-12-13 16:54:59,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 98 transitions, 1093 flow. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:59,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:54:59,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 324 [2022-12-13 16:54:59,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:54:59,873 INFO L130 PetriNetUnfolder]: 1940/3677 cut-off events. [2022-12-13 16:54:59,873 INFO L131 PetriNetUnfolder]: For 33060/33096 co-relation queries the response was YES. [2022-12-13 16:54:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22756 conditions, 3677 events. 1940/3677 cut-off events. For 33060/33096 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24352 event pairs, 470 based on Foata normal form. 330/3751 useless extension candidates. Maximal degree in co-relation 22722. Up to 2417 conditions per place. [2022-12-13 16:54:59,889 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 78 selfloop transitions, 42 changer transitions 11/132 dead transitions. [2022-12-13 16:54:59,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 132 transitions, 1768 flow [2022-12-13 16:54:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:54:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:54:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 587 transitions. [2022-12-13 16:54:59,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4529320987654321 [2022-12-13 16:54:59,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 587 transitions. [2022-12-13 16:54:59,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 587 transitions. [2022-12-13 16:54:59,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:54:59,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 587 transitions. [2022-12-13 16:54:59,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:59,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:59,892 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:59,892 INFO L175 Difference]: Start difference. First operand has 101 places, 98 transitions, 1093 flow. Second operand 4 states and 587 transitions. [2022-12-13 16:54:59,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 132 transitions, 1768 flow [2022-12-13 16:54:59,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 132 transitions, 1684 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 16:54:59,930 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 1434 flow [2022-12-13 16:54:59,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1434, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2022-12-13 16:54:59,931 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 69 predicate places. [2022-12-13 16:54:59,931 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 1434 flow [2022-12-13 16:54:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:54:59,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:54:59,931 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:54:59,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 16:55:00,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:00,132 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1369779494, now seen corresponding path program 3 times [2022-12-13 16:55:00,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:00,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928671787] [2022-12-13 16:55:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:00,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:01,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:01,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928671787] [2022-12-13 16:55:01,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928671787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237848733] [2022-12-13 16:55:01,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:55:01,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:01,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:01,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:01,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:55:01,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 16:55:01,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:55:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:01,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:01,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237848733] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:01,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:55:01,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-12-13 16:55:01,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435899919] [2022-12-13 16:55:01,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:01,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:55:01,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:55:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:55:01,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-12-13 16:55:01,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 1434 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:01,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:01,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-12-13 16:55:01,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:02,156 INFO L130 PetriNetUnfolder]: 2050/3896 cut-off events. [2022-12-13 16:55:02,156 INFO L131 PetriNetUnfolder]: For 39712/39742 co-relation queries the response was YES. [2022-12-13 16:55:02,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26754 conditions, 3896 events. 2050/3896 cut-off events. For 39712/39742 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26401 event pairs, 392 based on Foata normal form. 30/3738 useless extension candidates. Maximal degree in co-relation 26719. Up to 3226 conditions per place. [2022-12-13 16:55:02,174 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 107 selfloop transitions, 21 changer transitions 1/130 dead transitions. [2022-12-13 16:55:02,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1941 flow [2022-12-13 16:55:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:55:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:55:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2022-12-13 16:55:02,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4220679012345679 [2022-12-13 16:55:02,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2022-12-13 16:55:02,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2022-12-13 16:55:02,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:02,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2022-12-13 16:55:02,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:02,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:02,177 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:02,177 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 1434 flow. Second operand 4 states and 547 transitions. [2022-12-13 16:55:02,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1941 flow [2022-12-13 16:55:02,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 1802 flow, removed 64 selfloop flow, removed 5 redundant places. [2022-12-13 16:55:02,284 INFO L231 Difference]: Finished difference. Result has 84 places, 108 transitions, 1398 flow [2022-12-13 16:55:02,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1398, PETRI_PLACES=84, PETRI_TRANSITIONS=108} [2022-12-13 16:55:02,285 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2022-12-13 16:55:02,285 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 108 transitions, 1398 flow [2022-12-13 16:55:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:02,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:02,285 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:02,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 16:55:02,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 16:55:02,486 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1055638053, now seen corresponding path program 3 times [2022-12-13 16:55:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:02,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706674896] [2022-12-13 16:55:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:02,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:03,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:03,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706674896] [2022-12-13 16:55:03,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706674896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:03,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133109569] [2022-12-13 16:55:03,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:55:03,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:03,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:03,520 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:03,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:55:03,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 16:55:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:55:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:03,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:03,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133109569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:03,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:55:03,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-12-13 16:55:03,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221763290] [2022-12-13 16:55:03,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:03,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:55:03,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:55:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:55:03,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-12-13 16:55:03,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 108 transitions, 1398 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:03,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:03,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-12-13 16:55:03,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:04,270 INFO L130 PetriNetUnfolder]: 2042/3890 cut-off events. [2022-12-13 16:55:04,270 INFO L131 PetriNetUnfolder]: For 27174/27208 co-relation queries the response was YES. [2022-12-13 16:55:04,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24112 conditions, 3890 events. 2042/3890 cut-off events. For 27174/27208 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26293 event pairs, 726 based on Foata normal form. 28/3738 useless extension candidates. Maximal degree in co-relation 24080. Up to 3832 conditions per place. [2022-12-13 16:55:04,297 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 104 selfloop transitions, 7 changer transitions 2/114 dead transitions. [2022-12-13 16:55:04,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 1640 flow [2022-12-13 16:55:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:55:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:55:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 542 transitions. [2022-12-13 16:55:04,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4182098765432099 [2022-12-13 16:55:04,299 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 542 transitions. [2022-12-13 16:55:04,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 542 transitions. [2022-12-13 16:55:04,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:04,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 542 transitions. [2022-12-13 16:55:04,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.5) internal successors, (542), 4 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) [2022-12-13 16:55:04,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,301 INFO L175 Difference]: Start difference. First operand has 84 places, 108 transitions, 1398 flow. Second operand 4 states and 542 transitions. [2022-12-13 16:55:04,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 1640 flow [2022-12-13 16:55:04,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 114 transitions, 1613 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 16:55:04,343 INFO L231 Difference]: Finished difference. Result has 86 places, 107 transitions, 1382 flow [2022-12-13 16:55:04,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1382, PETRI_PLACES=86, PETRI_TRANSITIONS=107} [2022-12-13 16:55:04,344 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2022-12-13 16:55:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 107 transitions, 1382 flow [2022-12-13 16:55:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:04,344 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:04,344 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:04,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 16:55:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 16:55:04,545 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1055636972, now seen corresponding path program 3 times [2022-12-13 16:55:04,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:04,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417637603] [2022-12-13 16:55:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:04,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417637603] [2022-12-13 16:55:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417637603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131209293] [2022-12-13 16:55:05,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:55:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:05,292 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:05,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 16:55:05,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 16:55:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 16:55:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:05,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:05,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131209293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:05,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:55:05,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-12-13 16:55:05,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561151361] [2022-12-13 16:55:05,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:05,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:55:05,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:55:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:55:05,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-12-13 16:55:05,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 107 transitions, 1382 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:05,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:05,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-12-13 16:55:05,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:06,098 INFO L130 PetriNetUnfolder]: 1968/3790 cut-off events. [2022-12-13 16:55:06,098 INFO L131 PetriNetUnfolder]: For 28247/28281 co-relation queries the response was YES. [2022-12-13 16:55:06,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 3790 events. 1968/3790 cut-off events. For 28247/28281 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25859 event pairs, 408 based on Foata normal form. 92/3702 useless extension candidates. Maximal degree in co-relation 22985. Up to 3120 conditions per place. [2022-12-13 16:55:06,114 INFO L137 encePairwiseOnDemand]: 318/324 looper letters, 106 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2022-12-13 16:55:06,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1805 flow [2022-12-13 16:55:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:55:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:55:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2022-12-13 16:55:06,116 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42052469135802467 [2022-12-13 16:55:06,116 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2022-12-13 16:55:06,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2022-12-13 16:55:06,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:06,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2022-12-13 16:55:06,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:06,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:06,117 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:06,117 INFO L175 Difference]: Start difference. First operand has 86 places, 107 transitions, 1382 flow. Second operand 4 states and 545 transitions. [2022-12-13 16:55:06,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1805 flow [2022-12-13 16:55:06,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1791 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:55:06,153 INFO L231 Difference]: Finished difference. Result has 86 places, 105 transitions, 1372 flow [2022-12-13 16:55:06,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1372, PETRI_PLACES=86, PETRI_TRANSITIONS=105} [2022-12-13 16:55:06,153 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2022-12-13 16:55:06,153 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 105 transitions, 1372 flow [2022-12-13 16:55:06,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:06,153 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:06,154 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:06,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 16:55:06,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 16:55:06,355 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1055637995, now seen corresponding path program 3 times [2022-12-13 16:55:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:06,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037807739] [2022-12-13 16:55:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:06,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:06,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037807739] [2022-12-13 16:55:06,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037807739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656333391] [2022-12-13 16:55:06,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:55:06,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:06,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:06,990 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 16:55:07,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 16:55:07,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:55:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:07,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:07,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656333391] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:07,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:55:07,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2022-12-13 16:55:07,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731579275] [2022-12-13 16:55:07,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:07,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:55:07,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:55:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:55:07,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-12-13 16:55:07,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 105 transitions, 1372 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:07,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:07,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-12-13 16:55:07,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:07,654 INFO L130 PetriNetUnfolder]: 1962/3776 cut-off events. [2022-12-13 16:55:07,655 INFO L131 PetriNetUnfolder]: For 27031/27065 co-relation queries the response was YES. [2022-12-13 16:55:07,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23197 conditions, 3776 events. 1962/3776 cut-off events. For 27031/27065 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25685 event pairs, 726 based on Foata normal form. 36/3632 useless extension candidates. Maximal degree in co-relation 23164. Up to 3718 conditions per place. [2022-12-13 16:55:07,676 INFO L137 encePairwiseOnDemand]: 320/324 looper letters, 99 selfloop transitions, 5 changer transitions 5/110 dead transitions. [2022-12-13 16:55:07,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 1597 flow [2022-12-13 16:55:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:55:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:55:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2022-12-13 16:55:07,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-12-13 16:55:07,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2022-12-13 16:55:07,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2022-12-13 16:55:07,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:07,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2022-12-13 16:55:07,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:07,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:07,680 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 324.0) internal successors, (1620), 5 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:07,680 INFO L175 Difference]: Start difference. First operand has 86 places, 105 transitions, 1372 flow. Second operand 4 states and 540 transitions. [2022-12-13 16:55:07,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 1597 flow [2022-12-13 16:55:07,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 1559 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 16:55:07,733 INFO L231 Difference]: Finished difference. Result has 86 places, 103 transitions, 1320 flow [2022-12-13 16:55:07,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1320, PETRI_PLACES=86, PETRI_TRANSITIONS=103} [2022-12-13 16:55:07,734 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2022-12-13 16:55:07,734 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 103 transitions, 1320 flow [2022-12-13 16:55:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:07,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:07,734 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:07,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 16:55:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 16:55:07,935 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash -976107513, now seen corresponding path program 2 times [2022-12-13 16:55:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:07,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268912466] [2022-12-13 16:55:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:55:08,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268912466] [2022-12-13 16:55:08,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268912466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899398394] [2022-12-13 16:55:08,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:55:08,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:08,026 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:08,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 16:55:08,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:55:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:55:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 16:55:08,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:55:08,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899398394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:55:08,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:55:08,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2022-12-13 16:55:08,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350509] [2022-12-13 16:55:08,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:55:08,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:55:08,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:55:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:55:08,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 324 [2022-12-13 16:55:08,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 103 transitions, 1320 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:08,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:08,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 324 [2022-12-13 16:55:08,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:08,568 INFO L130 PetriNetUnfolder]: 1802/3474 cut-off events. [2022-12-13 16:55:08,568 INFO L131 PetriNetUnfolder]: For 24417/24451 co-relation queries the response was YES. [2022-12-13 16:55:08,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20560 conditions, 3474 events. 1802/3474 cut-off events. For 24417/24451 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23314 event pairs, 1118 based on Foata normal form. 150/3456 useless extension candidates. Maximal degree in co-relation 20527. Up to 3471 conditions per place. [2022-12-13 16:55:08,582 INFO L137 encePairwiseOnDemand]: 322/324 looper letters, 91 selfloop transitions, 1 changer transitions 2/95 dead transitions. [2022-12-13 16:55:08,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 1358 flow [2022-12-13 16:55:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:55:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:55:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2022-12-13 16:55:08,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4434156378600823 [2022-12-13 16:55:08,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2022-12-13 16:55:08,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2022-12-13 16:55:08,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:08,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2022-12-13 16:55:08,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:08,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:08,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:08,584 INFO L175 Difference]: Start difference. First operand has 86 places, 103 transitions, 1320 flow. Second operand 3 states and 431 transitions. [2022-12-13 16:55:08,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 1358 flow [2022-12-13 16:55:08,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 1249 flow, removed 20 selfloop flow, removed 12 redundant places. [2022-12-13 16:55:08,618 INFO L231 Difference]: Finished difference. Result has 73 places, 93 transitions, 1037 flow [2022-12-13 16:55:08,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1037, PETRI_PLACES=73, PETRI_TRANSITIONS=93} [2022-12-13 16:55:08,619 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2022-12-13 16:55:08,619 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 93 transitions, 1037 flow [2022-12-13 16:55:08,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:08,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:08,619 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:08,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 16:55:08,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:55:08,820 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:08,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -124438661, now seen corresponding path program 2 times [2022-12-13 16:55:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:08,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530052847] [2022-12-13 16:55:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:09,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530052847] [2022-12-13 16:55:09,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530052847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872343928] [2022-12-13 16:55:09,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:55:09,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:09,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:09,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 16:55:09,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:55:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 16:55:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:09,631 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 13 treesize of output 9 [2022-12-13 16:55:09,658 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 [2022-12-13 16:55:09,685 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 [2022-12-13 16:55:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:09,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:10,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:10,383 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 119 treesize of output 83 [2022-12-13 16:55:10,413 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 16:55:10,413 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 530 treesize of output 516 [2022-12-13 16:55:10,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:55:10,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:10,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 371 treesize of output 373 [2022-12-13 16:55:10,487 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 16:55:10,488 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 414 treesize of output 366 [2022-12-13 16:55:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:11,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872343928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:11,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:11,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 16:55:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519285623] [2022-12-13 16:55:11,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:11,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 16:55:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 16:55:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=670, Unknown=2, NotChecked=0, Total=812 [2022-12-13 16:55:13,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:55:13,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 93 transitions, 1037 flow. Second operand has 29 states, 29 states have (on average 98.24137931034483) internal successors, (2849), 29 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:13,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:13,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:55:13,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:15,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 16:55:17,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 16:55:22,696 INFO L130 PetriNetUnfolder]: 1981/3816 cut-off events. [2022-12-13 16:55:22,696 INFO L131 PetriNetUnfolder]: For 20551/20566 co-relation queries the response was YES. [2022-12-13 16:55:22,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21181 conditions, 3816 events. 1981/3816 cut-off events. For 20551/20566 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26555 event pairs, 675 based on Foata normal form. 324/3788 useless extension candidates. Maximal degree in co-relation 21155. Up to 2188 conditions per place. [2022-12-13 16:55:22,711 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 145 selfloop transitions, 140 changer transitions 8/294 dead transitions. [2022-12-13 16:55:22,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 294 transitions, 3384 flow [2022-12-13 16:55:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:55:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 16:55:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3799 transitions. [2022-12-13 16:55:22,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3169002335669002 [2022-12-13 16:55:22,715 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3799 transitions. [2022-12-13 16:55:22,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3799 transitions. [2022-12-13 16:55:22,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:22,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3799 transitions. [2022-12-13 16:55:22,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 102.67567567567568) internal successors, (3799), 37 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:22,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:22,725 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 324.0) internal successors, (12312), 38 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:22,725 INFO L175 Difference]: Start difference. First operand has 73 places, 93 transitions, 1037 flow. Second operand 37 states and 3799 transitions. [2022-12-13 16:55:22,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 294 transitions, 3384 flow [2022-12-13 16:55:22,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 294 transitions, 3369 flow, removed 7 selfloop flow, removed 1 redundant places. [2022-12-13 16:55:22,752 INFO L231 Difference]: Finished difference. Result has 120 places, 201 transitions, 2908 flow [2022-12-13 16:55:22,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2908, PETRI_PLACES=120, PETRI_TRANSITIONS=201} [2022-12-13 16:55:22,752 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2022-12-13 16:55:22,752 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 201 transitions, 2908 flow [2022-12-13 16:55:22,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.24137931034483) internal successors, (2849), 29 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:22,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:22,753 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:22,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 16:55:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 16:55:22,954 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1611873978, now seen corresponding path program 1 times [2022-12-13 16:55:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:22,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583984659] [2022-12-13 16:55:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583984659] [2022-12-13 16:55:23,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583984659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73601] [2022-12-13 16:55:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:23,341 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:23,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 16:55:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 16:55:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:23,510 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 13 treesize of output 9 [2022-12-13 16:55:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:23,558 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 18 treesize of output 20 [2022-12-13 16:55:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:23,605 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 18 treesize of output 20 [2022-12-13 16:55:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:23,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:24,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:24,099 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 90 treesize of output 66 [2022-12-13 16:55:24,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:24,128 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 397 treesize of output 403 [2022-12-13 16:55:24,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:24,152 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 237 treesize of output 225 [2022-12-13 16:55:24,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:24,172 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 296 treesize of output 246 [2022-12-13 16:55:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:25,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:25,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:25,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-12-13 16:55:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939241326] [2022-12-13 16:55:25,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:55:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:55:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=642, Unknown=2, NotChecked=0, Total=756 [2022-12-13 16:55:25,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:55:25,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 201 transitions, 2908 flow. Second operand has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:25,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:25,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:55:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:28,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:55:32,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:55:33,783 INFO L130 PetriNetUnfolder]: 2617/4840 cut-off events. [2022-12-13 16:55:33,783 INFO L131 PetriNetUnfolder]: For 46274/46284 co-relation queries the response was YES. [2022-12-13 16:55:33,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33729 conditions, 4840 events. 2617/4840 cut-off events. For 46274/46284 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 33611 event pairs, 699 based on Foata normal form. 118/4776 useless extension candidates. Maximal degree in co-relation 33690. Up to 3745 conditions per place. [2022-12-13 16:55:33,808 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 256 selfloop transitions, 200 changer transitions 7/464 dead transitions. [2022-12-13 16:55:33,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 464 transitions, 7438 flow [2022-12-13 16:55:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 16:55:33,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 16:55:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3880 transitions. [2022-12-13 16:55:33,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31513970110461337 [2022-12-13 16:55:33,813 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3880 transitions. [2022-12-13 16:55:33,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3880 transitions. [2022-12-13 16:55:33,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:33,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3880 transitions. [2022-12-13 16:55:33,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 102.10526315789474) internal successors, (3880), 38 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:33,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:33,825 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:33,825 INFO L175 Difference]: Start difference. First operand has 120 places, 201 transitions, 2908 flow. Second operand 38 states and 3880 transitions. [2022-12-13 16:55:33,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 464 transitions, 7438 flow [2022-12-13 16:55:33,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 464 transitions, 5773 flow, removed 810 selfloop flow, removed 8 redundant places. [2022-12-13 16:55:33,987 INFO L231 Difference]: Finished difference. Result has 172 places, 357 transitions, 4914 flow [2022-12-13 16:55:33,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4914, PETRI_PLACES=172, PETRI_TRANSITIONS=357} [2022-12-13 16:55:33,987 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 141 predicate places. [2022-12-13 16:55:33,987 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 357 transitions, 4914 flow [2022-12-13 16:55:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:33,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:33,988 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:33,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 16:55:34,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 16:55:34,189 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1955194404, now seen corresponding path program 2 times [2022-12-13 16:55:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:34,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351067244] [2022-12-13 16:55:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:34,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:34,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:34,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351067244] [2022-12-13 16:55:34,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351067244] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:34,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789283367] [2022-12-13 16:55:34,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:55:34,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:34,480 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:34,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 16:55:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:55:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 16:55:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:34,623 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 13 treesize of output 9 [2022-12-13 16:55:34,653 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 [2022-12-13 16:55:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:34,737 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 19 treesize of output 21 [2022-12-13 16:55:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:34,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:35,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:35,077 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 61 treesize of output 49 [2022-12-13 16:55:35,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:35,086 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 204 treesize of output 189 [2022-12-13 16:55:35,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:35,098 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 102 treesize of output 93 [2022-12-13 16:55:35,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 110 [2022-12-13 16:55:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:35,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789283367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:35,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:35,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-12-13 16:55:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316538476] [2022-12-13 16:55:35,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:35,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 16:55:35,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 16:55:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:55:36,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 324 [2022-12-13 16:55:36,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 357 transitions, 4914 flow. Second operand has 26 states, 26 states have (on average 111.38461538461539) internal successors, (2896), 26 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:36,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:36,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 324 [2022-12-13 16:55:36,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:39,126 INFO L130 PetriNetUnfolder]: 2902/5362 cut-off events. [2022-12-13 16:55:39,126 INFO L131 PetriNetUnfolder]: For 55263/55278 co-relation queries the response was YES. [2022-12-13 16:55:39,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35546 conditions, 5362 events. 2902/5362 cut-off events. For 55263/55278 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 38198 event pairs, 413 based on Foata normal form. 351/5531 useless extension candidates. Maximal degree in co-relation 35484. Up to 2889 conditions per place. [2022-12-13 16:55:39,160 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 248 selfloop transitions, 296 changer transitions 24/569 dead transitions. [2022-12-13 16:55:39,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 569 transitions, 8496 flow [2022-12-13 16:55:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 16:55:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 16:55:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3467 transitions. [2022-12-13 16:55:39,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3566872427983539 [2022-12-13 16:55:39,163 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3467 transitions. [2022-12-13 16:55:39,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3467 transitions. [2022-12-13 16:55:39,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:39,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3467 transitions. [2022-12-13 16:55:39,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 115.56666666666666) internal successors, (3467), 30 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:39,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 324.0) internal successors, (10044), 31 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:39,172 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 324.0) internal successors, (10044), 31 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:39,172 INFO L175 Difference]: Start difference. First operand has 172 places, 357 transitions, 4914 flow. Second operand 30 states and 3467 transitions. [2022-12-13 16:55:39,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 569 transitions, 8496 flow [2022-12-13 16:55:39,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 569 transitions, 7592 flow, removed 442 selfloop flow, removed 6 redundant places. [2022-12-13 16:55:39,418 INFO L231 Difference]: Finished difference. Result has 207 places, 457 transitions, 6506 flow [2022-12-13 16:55:39,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6506, PETRI_PLACES=207, PETRI_TRANSITIONS=457} [2022-12-13 16:55:39,418 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2022-12-13 16:55:39,418 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 457 transitions, 6506 flow [2022-12-13 16:55:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 111.38461538461539) internal successors, (2896), 26 states have internal predecessors, (2896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:39,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:39,419 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:39,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 16:55:39,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:39,620 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2097997554, now seen corresponding path program 3 times [2022-12-13 16:55:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405860572] [2022-12-13 16:55:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:40,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405860572] [2022-12-13 16:55:40,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405860572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256620676] [2022-12-13 16:55:40,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:55:40,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:40,489 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:40,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 16:55:40,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:55:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 16:55:40,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:40,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:40,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:40,800 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 49 treesize of output 67 [2022-12-13 16:55:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:40,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256620676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:40,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:40,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 18 [2022-12-13 16:55:40,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99199719] [2022-12-13 16:55:40,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:40,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:55:40,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:55:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:55:41,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-12-13 16:55:41,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 457 transitions, 6506 flow. Second operand has 20 states, 20 states have (on average 122.45) internal successors, (2449), 20 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:41,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:41,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-12-13 16:55:41,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:43,899 INFO L130 PetriNetUnfolder]: 3064/5558 cut-off events. [2022-12-13 16:55:43,899 INFO L131 PetriNetUnfolder]: For 61002/61017 co-relation queries the response was YES. [2022-12-13 16:55:43,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39738 conditions, 5558 events. 3064/5558 cut-off events. For 61002/61017 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38887 event pairs, 734 based on Foata normal form. 289/5593 useless extension candidates. Maximal degree in co-relation 39663. Up to 4448 conditions per place. [2022-12-13 16:55:43,935 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 462 selfloop transitions, 108 changer transitions 3/574 dead transitions. [2022-12-13 16:55:43,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 574 transitions, 9106 flow [2022-12-13 16:55:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:55:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:55:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3291 transitions. [2022-12-13 16:55:43,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3906695156695157 [2022-12-13 16:55:43,939 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3291 transitions. [2022-12-13 16:55:43,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3291 transitions. [2022-12-13 16:55:43,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:43,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3291 transitions. [2022-12-13 16:55:43,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 126.57692307692308) internal successors, (3291), 26 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:43,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:43,946 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 324.0) internal successors, (8748), 27 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:43,947 INFO L175 Difference]: Start difference. First operand has 207 places, 457 transitions, 6506 flow. Second operand 26 states and 3291 transitions. [2022-12-13 16:55:43,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 574 transitions, 9106 flow [2022-12-13 16:55:44,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 574 transitions, 8373 flow, removed 348 selfloop flow, removed 12 redundant places. [2022-12-13 16:55:44,271 INFO L231 Difference]: Finished difference. Result has 222 places, 472 transitions, 6481 flow [2022-12-13 16:55:44,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6481, PETRI_PLACES=222, PETRI_TRANSITIONS=472} [2022-12-13 16:55:44,271 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 191 predicate places. [2022-12-13 16:55:44,271 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 472 transitions, 6481 flow [2022-12-13 16:55:44,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.45) internal successors, (2449), 20 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:44,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:44,272 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:44,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 16:55:44,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:55:44,473 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1700042845, now seen corresponding path program 3 times [2022-12-13 16:55:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:44,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095231360] [2022-12-13 16:55:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:44,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:44,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095231360] [2022-12-13 16:55:44,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095231360] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:44,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792745863] [2022-12-13 16:55:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:55:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:44,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:44,946 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:44,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 16:55:45,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:55:45,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:55:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:45,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:45,148 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-13 16:55:45,148 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 [2022-12-13 16:55:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:45,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792745863] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:45,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:45,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2022-12-13 16:55:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812026564] [2022-12-13 16:55:45,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:45,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:55:45,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:55:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:55:45,598 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-12-13 16:55:45,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 472 transitions, 6481 flow. Second operand has 16 states, 16 states have (on average 122.6875) internal successors, (1963), 16 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:45,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:45,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-12-13 16:55:45,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:47,474 INFO L130 PetriNetUnfolder]: 3606/6543 cut-off events. [2022-12-13 16:55:47,475 INFO L131 PetriNetUnfolder]: For 79984/79999 co-relation queries the response was YES. [2022-12-13 16:55:47,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46955 conditions, 6543 events. 3606/6543 cut-off events. For 79984/79999 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 47260 event pairs, 453 based on Foata normal form. 67/6430 useless extension candidates. Maximal degree in co-relation 46877. Up to 3364 conditions per place. [2022-12-13 16:55:47,519 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 316 selfloop transitions, 253 changer transitions 6/576 dead transitions. [2022-12-13 16:55:47,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 576 transitions, 8748 flow [2022-12-13 16:55:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:55:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 16:55:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2162 transitions. [2022-12-13 16:55:47,521 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3925199709513435 [2022-12-13 16:55:47,521 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2162 transitions. [2022-12-13 16:55:47,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2162 transitions. [2022-12-13 16:55:47,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:47,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2162 transitions. [2022-12-13 16:55:47,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.17647058823529) internal successors, (2162), 17 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:47,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:47,526 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:47,526 INFO L175 Difference]: Start difference. First operand has 222 places, 472 transitions, 6481 flow. Second operand 17 states and 2162 transitions. [2022-12-13 16:55:47,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 576 transitions, 8748 flow [2022-12-13 16:55:48,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 576 transitions, 8486 flow, removed 120 selfloop flow, removed 8 redundant places. [2022-12-13 16:55:48,033 INFO L231 Difference]: Finished difference. Result has 231 places, 501 transitions, 7388 flow [2022-12-13 16:55:48,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7388, PETRI_PLACES=231, PETRI_TRANSITIONS=501} [2022-12-13 16:55:48,034 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2022-12-13 16:55:48,034 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 501 transitions, 7388 flow [2022-12-13 16:55:48,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 122.6875) internal successors, (1963), 16 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:48,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:48,035 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:48,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 16:55:48,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:48,236 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2041076033, now seen corresponding path program 4 times [2022-12-13 16:55:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:48,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562613491] [2022-12-13 16:55:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:48,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:48,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562613491] [2022-12-13 16:55:48,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562613491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:48,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945016687] [2022-12-13 16:55:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:55:48,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:48,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:48,903 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 16:55:48,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:55:48,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 16:55:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:49,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:49,135 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 18 treesize of output 20 [2022-12-13 16:55:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:49,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:49,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:49,572 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 96 treesize of output 114 [2022-12-13 16:55:49,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:49,585 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 48 treesize of output 54 [2022-12-13 16:55:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:49,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945016687] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:49,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:49,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 16:55:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663180541] [2022-12-13 16:55:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 16:55:49,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 16:55:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=680, Unknown=4, NotChecked=0, Total=812 [2022-12-13 16:55:50,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:55:50,811 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 501 transitions, 7388 flow. Second operand has 29 states, 29 states have (on average 101.24137931034483) internal successors, (2936), 29 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:50,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:50,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:55:50,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:55:53,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:55:56,628 INFO L130 PetriNetUnfolder]: 3814/6910 cut-off events. [2022-12-13 16:55:56,628 INFO L131 PetriNetUnfolder]: For 106057/106072 co-relation queries the response was YES. [2022-12-13 16:55:56,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53218 conditions, 6910 events. 3814/6910 cut-off events. For 106057/106072 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 50270 event pairs, 487 based on Foata normal form. 407/7173 useless extension candidates. Maximal degree in co-relation 53138. Up to 3237 conditions per place. [2022-12-13 16:55:56,679 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 257 selfloop transitions, 387 changer transitions 7/652 dead transitions. [2022-12-13 16:55:56,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 652 transitions, 10641 flow [2022-12-13 16:55:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 16:55:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 16:55:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3263 transitions. [2022-12-13 16:55:56,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3248705694942254 [2022-12-13 16:55:56,683 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3263 transitions. [2022-12-13 16:55:56,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3263 transitions. [2022-12-13 16:55:56,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:55:56,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3263 transitions. [2022-12-13 16:55:56,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.25806451612904) internal successors, (3263), 31 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:56,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:56,691 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:56,692 INFO L175 Difference]: Start difference. First operand has 231 places, 501 transitions, 7388 flow. Second operand 31 states and 3263 transitions. [2022-12-13 16:55:56,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 652 transitions, 10641 flow [2022-12-13 16:55:57,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 652 transitions, 10017 flow, removed 158 selfloop flow, removed 10 redundant places. [2022-12-13 16:55:57,441 INFO L231 Difference]: Finished difference. Result has 257 places, 563 transitions, 9225 flow [2022-12-13 16:55:57,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6383, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=9225, PETRI_PLACES=257, PETRI_TRANSITIONS=563} [2022-12-13 16:55:57,442 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 226 predicate places. [2022-12-13 16:55:57,442 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 563 transitions, 9225 flow [2022-12-13 16:55:57,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 101.24137931034483) internal successors, (2936), 29 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:57,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:55:57,442 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:55:57,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 16:55:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:57,644 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:55:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:55:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -209066956, now seen corresponding path program 5 times [2022-12-13 16:55:57,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:55:57,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124020049] [2022-12-13 16:55:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:55:57,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:55:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:55:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:55:58,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:55:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124020049] [2022-12-13 16:55:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124020049] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:55:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33845538] [2022-12-13 16:55:58,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:55:58,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:55:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:55:58,460 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:55:58,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 16:55:58,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:55:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:55:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 16:55:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:55:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:55:58,652 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 19 treesize of output 21 [2022-12-13 16:55:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:55:58,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:55:58,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:58,923 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 96 treesize of output 114 [2022-12-13 16:55:58,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:55:58,937 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 48 treesize of output 54 [2022-12-13 16:55:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:55:59,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33845538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:55:59,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:55:59,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-12-13 16:55:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705554339] [2022-12-13 16:55:59,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:55:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:55:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:55:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:55:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=659, Unknown=3, NotChecked=0, Total=756 [2022-12-13 16:55:59,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:55:59,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 563 transitions, 9225 flow. Second operand has 28 states, 28 states have (on average 101.32142857142857) internal successors, (2837), 28 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:55:59,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:55:59,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:55:59,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:00,269 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse4 c_~q~0.offset 4)) (.cse3 (select |c_#memory_int| c_~q~0.base)) (.cse1 (+ .cse4 c_~q~0.offset))) (and (<= 0 c_~q_front~0) (forall ((v_ArrVal_960 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_960) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) 2147483648)))) (= (select .cse3 .cse2) 1) (= c_~q~0.offset 0) (= (select .cse3 .cse1) 1)))) is different from false [2022-12-13 16:56:00,376 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse4 c_~q~0.offset 4)) (.cse3 (select |c_#memory_int| c_~q~0.base)) (.cse1 (+ .cse4 c_~q~0.offset))) (and (forall ((v_ArrVal_960 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_960) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) 2147483648)))) (= (select .cse3 .cse2) 1) (= (select .cse3 .cse1) 1)))) is different from false [2022-12-13 16:56:03,830 INFO L130 PetriNetUnfolder]: 5466/9772 cut-off events. [2022-12-13 16:56:03,830 INFO L131 PetriNetUnfolder]: For 149608/149623 co-relation queries the response was YES. [2022-12-13 16:56:03,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78384 conditions, 9772 events. 5466/9772 cut-off events. For 149608/149623 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 75061 event pairs, 276 based on Foata normal form. 159/9751 useless extension candidates. Maximal degree in co-relation 78292. Up to 5919 conditions per place. [2022-12-13 16:56:03,907 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 545 selfloop transitions, 372 changer transitions 34/952 dead transitions. [2022-12-13 16:56:03,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 952 transitions, 17293 flow [2022-12-13 16:56:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 16:56:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 16:56:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3487 transitions. [2022-12-13 16:56:03,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32613168724279834 [2022-12-13 16:56:03,911 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3487 transitions. [2022-12-13 16:56:03,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3487 transitions. [2022-12-13 16:56:03,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:03,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3487 transitions. [2022-12-13 16:56:03,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 105.66666666666667) internal successors, (3487), 33 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:03,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 324.0) internal successors, (11016), 34 states have internal predecessors, (11016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:03,923 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 324.0) internal successors, (11016), 34 states have internal predecessors, (11016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:03,923 INFO L175 Difference]: Start difference. First operand has 257 places, 563 transitions, 9225 flow. Second operand 33 states and 3487 transitions. [2022-12-13 16:56:03,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 952 transitions, 17293 flow [2022-12-13 16:56:05,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 952 transitions, 16248 flow, removed 502 selfloop flow, removed 10 redundant places. [2022-12-13 16:56:05,265 INFO L231 Difference]: Finished difference. Result has 289 places, 763 transitions, 13303 flow [2022-12-13 16:56:05,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=8690, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13303, PETRI_PLACES=289, PETRI_TRANSITIONS=763} [2022-12-13 16:56:05,265 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2022-12-13 16:56:05,265 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 763 transitions, 13303 flow [2022-12-13 16:56:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.32142857142857) internal successors, (2837), 28 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:05,266 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:05,266 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:56:05,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 16:56:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:05,466 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:56:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -212839094, now seen corresponding path program 1 times [2022-12-13 16:56:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:56:05,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58889428] [2022-12-13 16:56:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:56:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:56:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58889428] [2022-12-13 16:56:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58889428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:56:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933193559] [2022-12-13 16:56:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:05,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:05,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:56:05,877 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:56:05,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 16:56:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 16:56:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:56:06,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:06,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:06,087 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 23 [2022-12-13 16:56:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:56:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933193559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:06,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:56:06,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2022-12-13 16:56:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719625878] [2022-12-13 16:56:06,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:06,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:56:06,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:56:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:56:06,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:56:06,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-12-13 16:56:06,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 763 transitions, 13303 flow. Second operand has 18 states, 18 states have (on average 122.66666666666667) internal successors, (2208), 18 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:06,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:06,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-12-13 16:56:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:09,929 INFO L130 PetriNetUnfolder]: 5079/9077 cut-off events. [2022-12-13 16:56:09,929 INFO L131 PetriNetUnfolder]: For 157614/157614 co-relation queries the response was YES. [2022-12-13 16:56:09,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80233 conditions, 9077 events. 5079/9077 cut-off events. For 157614/157614 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 69187 event pairs, 775 based on Foata normal form. 209/9154 useless extension candidates. Maximal degree in co-relation 80132. Up to 6989 conditions per place. [2022-12-13 16:56:10,024 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 585 selfloop transitions, 269 changer transitions 8/863 dead transitions. [2022-12-13 16:56:10,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 863 transitions, 16487 flow [2022-12-13 16:56:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:56:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 16:56:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2403 transitions. [2022-12-13 16:56:10,030 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39035087719298245 [2022-12-13 16:56:10,030 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2403 transitions. [2022-12-13 16:56:10,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2403 transitions. [2022-12-13 16:56:10,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:10,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2403 transitions. [2022-12-13 16:56:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.47368421052632) internal successors, (2403), 19 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:10,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 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) [2022-12-13 16:56:10,038 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 324.0) internal successors, (6480), 20 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) [2022-12-13 16:56:10,038 INFO L175 Difference]: Start difference. First operand has 289 places, 763 transitions, 13303 flow. Second operand 19 states and 2403 transitions. [2022-12-13 16:56:10,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 863 transitions, 16487 flow [2022-12-13 16:56:11,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 863 transitions, 15372 flow, removed 395 selfloop flow, removed 17 redundant places. [2022-12-13 16:56:11,496 INFO L231 Difference]: Finished difference. Result has 285 places, 767 transitions, 13003 flow [2022-12-13 16:56:11,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13003, PETRI_PLACES=285, PETRI_TRANSITIONS=767} [2022-12-13 16:56:11,496 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 254 predicate places. [2022-12-13 16:56:11,496 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 767 transitions, 13003 flow [2022-12-13 16:56:11,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 122.66666666666667) internal successors, (2208), 18 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:11,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:11,516 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:56:11,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 16:56:11,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:11,717 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:56:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:11,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2041100213, now seen corresponding path program 6 times [2022-12-13 16:56:11,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:56:11,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893044166] [2022-12-13 16:56:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:11,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:56:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:12,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:56:12,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893044166] [2022-12-13 16:56:12,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893044166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:56:12,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418098650] [2022-12-13 16:56:12,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:56:12,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:12,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:56:12,335 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:56:12,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 16:56:12,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 16:56:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:56:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 16:56:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:12,487 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 13 treesize of output 9 [2022-12-13 16:56:12,530 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 [2022-12-13 16:56:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:56:12,630 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 18 treesize of output 20 [2022-12-13 16:56:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:12,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:15,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:15,164 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 116 treesize of output 80 [2022-12-13 16:56:15,205 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 16:56:15,205 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 408 treesize of output 402 [2022-12-13 16:56:15,252 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 16:56:15,252 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 350 treesize of output 358 [2022-12-13 16:56:15,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:15,278 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 288 treesize of output 238 [2022-12-13 16:56:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418098650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:16,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:56:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-12-13 16:56:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488672593] [2022-12-13 16:56:16,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 16:56:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:56:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 16:56:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=665, Unknown=4, NotChecked=0, Total=812 [2022-12-13 16:56:18,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:20,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:22,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:24,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:26,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:29,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:31,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:33,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:35,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:37,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:56:37,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:56:37,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 767 transitions, 13003 flow. Second operand has 29 states, 29 states have (on average 98.24137931034483) internal successors, (2849), 29 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:37,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:37,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:56:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:40,411 INFO L130 PetriNetUnfolder]: 3533/6402 cut-off events. [2022-12-13 16:56:40,411 INFO L131 PetriNetUnfolder]: For 120544/120544 co-relation queries the response was YES. [2022-12-13 16:56:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55593 conditions, 6402 events. 3533/6402 cut-off events. For 120544/120544 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46848 event pairs, 1169 based on Foata normal form. 155/6501 useless extension candidates. Maximal degree in co-relation 55496. Up to 5974 conditions per place. [2022-12-13 16:56:40,510 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 377 selfloop transitions, 54 changer transitions 9/441 dead transitions. [2022-12-13 16:56:40,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 441 transitions, 7766 flow [2022-12-13 16:56:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:56:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:56:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2131 transitions. [2022-12-13 16:56:40,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3131981187536743 [2022-12-13 16:56:40,513 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2131 transitions. [2022-12-13 16:56:40,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2131 transitions. [2022-12-13 16:56:40,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:40,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2131 transitions. [2022-12-13 16:56:40,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.47619047619048) internal successors, (2131), 21 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:40,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:40,518 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:40,518 INFO L175 Difference]: Start difference. First operand has 285 places, 767 transitions, 13003 flow. Second operand 21 states and 2131 transitions. [2022-12-13 16:56:40,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 441 transitions, 7766 flow [2022-12-13 16:56:41,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 441 transitions, 7236 flow, removed 97 selfloop flow, removed 40 redundant places. [2022-12-13 16:56:41,093 INFO L231 Difference]: Finished difference. Result has 246 places, 402 transitions, 6219 flow [2022-12-13 16:56:41,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6170, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6219, PETRI_PLACES=246, PETRI_TRANSITIONS=402} [2022-12-13 16:56:41,093 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2022-12-13 16:56:41,093 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 402 transitions, 6219 flow [2022-12-13 16:56:41,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.24137931034483) internal successors, (2849), 29 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:41,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:41,094 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:56:41,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 16:56:41,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:41,295 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:56:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1955194346, now seen corresponding path program 1 times [2022-12-13 16:56:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:56:41,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398873203] [2022-12-13 16:56:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:56:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:41,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:56:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398873203] [2022-12-13 16:56:41,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398873203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:56:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870534425] [2022-12-13 16:56:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:41,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:41,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:56:41,690 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:56:41,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 16:56:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:41,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 16:56:41,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:41,806 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 16 treesize of output 12 [2022-12-13 16:56:41,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-12-13 16:56:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:56:41,913 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 19 treesize of output 21 [2022-12-13 16:56:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:56:42,069 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 31 treesize of output 31 [2022-12-13 16:56:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:42,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:42,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:42,709 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 2 case distinctions, treesize of input 111 treesize of output 76 [2022-12-13 16:56:42,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:42,738 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 267 treesize of output 282 [2022-12-13 16:56:42,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:42,760 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 120 treesize of output 113 [2022-12-13 16:56:42,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:42,773 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 162 treesize of output 110 [2022-12-13 16:56:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:43,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870534425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:43,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:56:43,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-12-13 16:56:43,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196118971] [2022-12-13 16:56:43,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:43,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:56:43,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:56:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:56:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=661, Unknown=7, NotChecked=0, Total=756 [2022-12-13 16:56:44,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:56:44,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 402 transitions, 6219 flow. Second operand has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:44,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:44,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:56:44,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:48,593 INFO L130 PetriNetUnfolder]: 3510/6349 cut-off events. [2022-12-13 16:56:48,593 INFO L131 PetriNetUnfolder]: For 104432/104432 co-relation queries the response was YES. [2022-12-13 16:56:48,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51590 conditions, 6349 events. 3510/6349 cut-off events. For 104432/104432 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 46250 event pairs, 1128 based on Foata normal form. 24/6317 useless extension candidates. Maximal degree in co-relation 51515. Up to 5946 conditions per place. [2022-12-13 16:56:48,644 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 362 selfloop transitions, 67 changer transitions 17/447 dead transitions. [2022-12-13 16:56:48,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 447 transitions, 7329 flow [2022-12-13 16:56:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 16:56:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 16:56:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2134 transitions. [2022-12-13 16:56:48,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3136390358612581 [2022-12-13 16:56:48,646 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2134 transitions. [2022-12-13 16:56:48,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2134 transitions. [2022-12-13 16:56:48,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:48,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2134 transitions. [2022-12-13 16:56:48,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 101.61904761904762) internal successors, (2134), 21 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:48,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:48,652 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 324.0) internal successors, (7128), 22 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:48,652 INFO L175 Difference]: Start difference. First operand has 246 places, 402 transitions, 6219 flow. Second operand 21 states and 2134 transitions. [2022-12-13 16:56:48,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 447 transitions, 7329 flow [2022-12-13 16:56:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 447 transitions, 7106 flow, removed 13 selfloop flow, removed 15 redundant places. [2022-12-13 16:56:49,168 INFO L231 Difference]: Finished difference. Result has 252 places, 397 transitions, 6053 flow [2022-12-13 16:56:49,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6053, PETRI_PLACES=252, PETRI_TRANSITIONS=397} [2022-12-13 16:56:49,168 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2022-12-13 16:56:49,168 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 397 transitions, 6053 flow [2022-12-13 16:56:49,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:49,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:49,169 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:56:49,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 16:56:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:49,369 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:56:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash -68751346, now seen corresponding path program 7 times [2022-12-13 16:56:49,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:56:49,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656042652] [2022-12-13 16:56:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:49,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:56:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:50,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:56:50,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656042652] [2022-12-13 16:56:50,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656042652] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:56:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314755800] [2022-12-13 16:56:50,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:56:50,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:50,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:56:50,168 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:56:50,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 16:56:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 16:56:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:50,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:56:50,365 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 19 treesize of output 21 [2022-12-13 16:56:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:56:50,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:50,616 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1115 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1115) c_~q~0.base))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2022-12-13 16:56:50,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:50,639 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 96 treesize of output 114 [2022-12-13 16:56:50,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:50,652 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 48 treesize of output 54 [2022-12-13 16:56:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:56:50,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314755800] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:50,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:56:50,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2022-12-13 16:56:50,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217735568] [2022-12-13 16:56:50,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:50,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:56:50,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:56:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:56:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=615, Unknown=1, NotChecked=50, Total=756 [2022-12-13 16:56:50,959 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:56:50,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 397 transitions, 6053 flow. Second operand has 28 states, 28 states have (on average 101.32142857142857) internal successors, (2837), 28 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:50,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:50,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:56:50,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:56:53,505 INFO L130 PetriNetUnfolder]: 3664/6605 cut-off events. [2022-12-13 16:56:53,505 INFO L131 PetriNetUnfolder]: For 107204/107204 co-relation queries the response was YES. [2022-12-13 16:56:53,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53247 conditions, 6605 events. 3664/6605 cut-off events. For 107204/107204 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 48348 event pairs, 362 based on Foata normal form. 48/6597 useless extension candidates. Maximal degree in co-relation 53170. Up to 2848 conditions per place. [2022-12-13 16:56:53,557 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 230 selfloop transitions, 308 changer transitions 1/540 dead transitions. [2022-12-13 16:56:53,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 540 transitions, 9181 flow [2022-12-13 16:56:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 16:56:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 16:56:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2635 transitions. [2022-12-13 16:56:53,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3253086419753086 [2022-12-13 16:56:53,562 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2635 transitions. [2022-12-13 16:56:53,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2635 transitions. [2022-12-13 16:56:53,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:56:53,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2635 transitions. [2022-12-13 16:56:53,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 105.4) internal successors, (2635), 25 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:53,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:53,568 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:53,568 INFO L175 Difference]: Start difference. First operand has 252 places, 397 transitions, 6053 flow. Second operand 25 states and 2635 transitions. [2022-12-13 16:56:53,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 540 transitions, 9181 flow [2022-12-13 16:56:54,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 540 transitions, 9046 flow, removed 7 selfloop flow, removed 14 redundant places. [2022-12-13 16:56:54,094 INFO L231 Difference]: Finished difference. Result has 260 places, 427 transitions, 7158 flow [2022-12-13 16:56:54,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=5918, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7158, PETRI_PLACES=260, PETRI_TRANSITIONS=427} [2022-12-13 16:56:54,095 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2022-12-13 16:56:54,095 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 427 transitions, 7158 flow [2022-12-13 16:56:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.32142857142857) internal successors, (2837), 28 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:54,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:56:54,095 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:56:54,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 16:56:54,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:54,296 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:56:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:56:54,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1010432363, now seen corresponding path program 8 times [2022-12-13 16:56:54,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:56:54,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520595401] [2022-12-13 16:56:54,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:56:54,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:56:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:56:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:54,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:56:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520595401] [2022-12-13 16:56:54,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520595401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:56:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688932931] [2022-12-13 16:56:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:56:54,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:56:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:56:54,732 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:56:54,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 16:56:54,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:56:54,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:56:54,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 16:56:54,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:56:54,912 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 13 treesize of output 9 [2022-12-13 16:56:54,954 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 [2022-12-13 16:56:55,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:56:55,127 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 29 treesize of output 29 [2022-12-13 16:56:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:55,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:56:55,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:56:55,724 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 113 treesize of output 77 [2022-12-13 16:56:55,758 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-12-13 16:56:55,758 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 170 treesize of output 177 [2022-12-13 16:56:55,765 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 89 treesize of output 63 [2022-12-13 16:56:55,799 INFO L321 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2022-12-13 16:56:55,799 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 86 treesize of output 101 [2022-12-13 16:56:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:56:56,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688932931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:56:56,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:56:56,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 28 [2022-12-13 16:56:56,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130709663] [2022-12-13 16:56:56,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:56:56,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:56:56,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:56:56,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:56:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=689, Unknown=1, NotChecked=0, Total=870 [2022-12-13 16:56:57,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 324 [2022-12-13 16:56:57,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 427 transitions, 7158 flow. Second operand has 30 states, 30 states have (on average 113.3) internal successors, (3399), 30 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:56:57,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:56:57,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 324 [2022-12-13 16:56:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:01,193 INFO L130 PetriNetUnfolder]: 3696/6662 cut-off events. [2022-12-13 16:57:01,194 INFO L131 PetriNetUnfolder]: For 121193/121193 co-relation queries the response was YES. [2022-12-13 16:57:01,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56661 conditions, 6662 events. 3696/6662 cut-off events. For 121193/121193 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 48853 event pairs, 1209 based on Foata normal form. 2/6608 useless extension candidates. Maximal degree in co-relation 56582. Up to 6326 conditions per place. [2022-12-13 16:57:01,256 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 395 selfloop transitions, 66 changer transitions 0/461 dead transitions. [2022-12-13 16:57:01,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 461 transitions, 8275 flow [2022-12-13 16:57:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:57:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 16:57:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2548 transitions. [2022-12-13 16:57:01,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3574635241301908 [2022-12-13 16:57:01,261 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2548 transitions. [2022-12-13 16:57:01,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2548 transitions. [2022-12-13 16:57:01,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:01,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2548 transitions. [2022-12-13 16:57:01,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 115.81818181818181) internal successors, (2548), 22 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:01,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:01,269 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 324.0) internal successors, (7452), 23 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:01,269 INFO L175 Difference]: Start difference. First operand has 260 places, 427 transitions, 7158 flow. Second operand 22 states and 2548 transitions. [2022-12-13 16:57:01,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 461 transitions, 8275 flow [2022-12-13 16:57:01,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 461 transitions, 7807 flow, removed 34 selfloop flow, removed 18 redundant places. [2022-12-13 16:57:01,961 INFO L231 Difference]: Finished difference. Result has 265 places, 430 transitions, 6862 flow [2022-12-13 16:57:01,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6678, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6862, PETRI_PLACES=265, PETRI_TRANSITIONS=430} [2022-12-13 16:57:01,961 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 234 predicate places. [2022-12-13 16:57:01,961 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 430 transitions, 6862 flow [2022-12-13 16:57:01,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 113.3) internal successors, (3399), 30 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:01,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:01,962 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:01,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 16:57:02,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:02,163 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:57:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash -362869125, now seen corresponding path program 2 times [2022-12-13 16:57:02,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:02,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819483101] [2022-12-13 16:57:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:57:02,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819483101] [2022-12-13 16:57:02,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819483101] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914677818] [2022-12-13 16:57:02,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:57:02,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:02,271 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:02,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 16:57:02,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:57:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 16:57:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:02,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:02,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914677818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:02,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:02,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 20 [2022-12-13 16:57:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253066114] [2022-12-13 16:57:02,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:02,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:57:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:57:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:57:02,783 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 324 [2022-12-13 16:57:02,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 430 transitions, 6862 flow. Second operand has 21 states, 21 states have (on average 129.95238095238096) internal successors, (2729), 21 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:02,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:02,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 324 [2022-12-13 16:57:02,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:05,280 INFO L130 PetriNetUnfolder]: 4390/7918 cut-off events. [2022-12-13 16:57:05,280 INFO L131 PetriNetUnfolder]: For 136744/136747 co-relation queries the response was YES. [2022-12-13 16:57:05,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68128 conditions, 7918 events. 4390/7918 cut-off events. For 136744/136747 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 60049 event pairs, 411 based on Foata normal form. 252/8008 useless extension candidates. Maximal degree in co-relation 68047. Up to 3105 conditions per place. [2022-12-13 16:57:05,356 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 248 selfloop transitions, 336 changer transitions 75/660 dead transitions. [2022-12-13 16:57:05,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 660 transitions, 11548 flow [2022-12-13 16:57:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 16:57:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 16:57:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3765 transitions. [2022-12-13 16:57:05,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4150132275132275 [2022-12-13 16:57:05,361 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3765 transitions. [2022-12-13 16:57:05,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3765 transitions. [2022-12-13 16:57:05,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:05,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3765 transitions. [2022-12-13 16:57:05,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 134.46428571428572) internal successors, (3765), 28 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:05,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:05,372 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 324.0) internal successors, (9396), 29 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:05,372 INFO L175 Difference]: Start difference. First operand has 265 places, 430 transitions, 6862 flow. Second operand 28 states and 3765 transitions. [2022-12-13 16:57:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 660 transitions, 11548 flow [2022-12-13 16:57:06,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 660 transitions, 11183 flow, removed 72 selfloop flow, removed 31 redundant places. [2022-12-13 16:57:06,124 INFO L231 Difference]: Finished difference. Result has 262 places, 517 transitions, 9433 flow [2022-12-13 16:57:06,124 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=6041, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9433, PETRI_PLACES=262, PETRI_TRANSITIONS=517} [2022-12-13 16:57:06,124 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 231 predicate places. [2022-12-13 16:57:06,124 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 517 transitions, 9433 flow [2022-12-13 16:57:06,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 129.95238095238096) internal successors, (2729), 21 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:06,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:06,125 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:06,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 16:57:06,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 16:57:06,326 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:57:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:06,327 INFO L85 PathProgramCache]: Analyzing trace with hash -212839036, now seen corresponding path program 9 times [2022-12-13 16:57:06,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:06,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293537367] [2022-12-13 16:57:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:06,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:07,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:07,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293537367] [2022-12-13 16:57:07,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293537367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:07,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110894089] [2022-12-13 16:57:07,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:57:07,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:07,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:07,207 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:07,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 16:57:07,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:57:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 16:57:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:57:07,420 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 19 treesize of output 21 [2022-12-13 16:57:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:57:07,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:07,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:07,752 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 96 treesize of output 114 [2022-12-13 16:57:07,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:07,767 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 48 treesize of output 54 [2022-12-13 16:57:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:57:07,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110894089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:07,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:07,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2022-12-13 16:57:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634130691] [2022-12-13 16:57:07,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:07,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 16:57:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 16:57:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=569, Unknown=6, NotChecked=0, Total=650 [2022-12-13 16:57:09,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:57:09,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 517 transitions, 9433 flow. Second operand has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:09,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:09,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:57:09,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:12,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:14,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:17,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:19,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:21,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:24,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:57:26,039 INFO L130 PetriNetUnfolder]: 4831/8698 cut-off events. [2022-12-13 16:57:26,039 INFO L131 PetriNetUnfolder]: For 161145/161145 co-relation queries the response was YES. [2022-12-13 16:57:26,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79178 conditions, 8698 events. 4831/8698 cut-off events. For 161145/161145 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 67253 event pairs, 370 based on Foata normal form. 188/8724 useless extension candidates. Maximal degree in co-relation 79100. Up to 5189 conditions per place. [2022-12-13 16:57:26,148 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 341 selfloop transitions, 553 changer transitions 19/914 dead transitions. [2022-12-13 16:57:26,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 914 transitions, 18430 flow [2022-12-13 16:57:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 16:57:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 16:57:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4409 transitions. [2022-12-13 16:57:26,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3240005878894768 [2022-12-13 16:57:26,152 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4409 transitions. [2022-12-13 16:57:26,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4409 transitions. [2022-12-13 16:57:26,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:26,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4409 transitions. [2022-12-13 16:57:26,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 104.97619047619048) internal successors, (4409), 42 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:26,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 324.0) internal successors, (13932), 43 states have internal predecessors, (13932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:26,163 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 324.0) internal successors, (13932), 43 states have internal predecessors, (13932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:26,163 INFO L175 Difference]: Start difference. First operand has 262 places, 517 transitions, 9433 flow. Second operand 42 states and 4409 transitions. [2022-12-13 16:57:26,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 914 transitions, 18430 flow [2022-12-13 16:57:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 914 transitions, 14385 flow, removed 1752 selfloop flow, removed 19 redundant places. [2022-12-13 16:57:27,765 INFO L231 Difference]: Finished difference. Result has 247 places, 776 transitions, 13306 flow [2022-12-13 16:57:27,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=7329, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=13306, PETRI_PLACES=247, PETRI_TRANSITIONS=776} [2022-12-13 16:57:27,765 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 216 predicate places. [2022-12-13 16:57:27,766 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 776 transitions, 13306 flow [2022-12-13 16:57:27,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:27,766 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:27,766 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:27,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 16:57:27,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 16:57:27,967 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:57:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash 817828814, now seen corresponding path program 10 times [2022-12-13 16:57:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:27,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089604827] [2022-12-13 16:57:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:27,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089604827] [2022-12-13 16:57:28,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089604827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646351891] [2022-12-13 16:57:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:57:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:28,943 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:28,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 16:57:29,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:57:29,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:29,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:57:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:57:29,166 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 30 treesize of output 30 [2022-12-13 16:57:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:57:29,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:29,350 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1265 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1265) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648)) is different from false [2022-12-13 16:57:29,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:29,418 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 75 treesize of output 93 [2022-12-13 16:57:29,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:29,444 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 18 treesize of output 5 [2022-12-13 16:57:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:57:29,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646351891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:29,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:29,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2022-12-13 16:57:29,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113697301] [2022-12-13 16:57:29,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:29,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:57:29,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:57:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=574, Unknown=1, NotChecked=48, Total=702 [2022-12-13 16:57:29,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:57:29,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 776 transitions, 13306 flow. Second operand has 27 states, 27 states have (on average 98.33333333333333) internal successors, (2655), 27 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:29,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:29,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:57:29,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:33,220 INFO L130 PetriNetUnfolder]: 4771/8545 cut-off events. [2022-12-13 16:57:33,220 INFO L131 PetriNetUnfolder]: For 107092/107092 co-relation queries the response was YES. [2022-12-13 16:57:33,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70139 conditions, 8545 events. 4771/8545 cut-off events. For 107092/107092 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 65636 event pairs, 160 based on Foata normal form. 42/8427 useless extension candidates. Maximal degree in co-relation 70058. Up to 3705 conditions per place. [2022-12-13 16:57:33,283 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 414 selfloop transitions, 472 changer transitions 2/889 dead transitions. [2022-12-13 16:57:33,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 889 transitions, 16422 flow [2022-12-13 16:57:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:57:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 16:57:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2457 transitions. [2022-12-13 16:57:33,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2022-12-13 16:57:33,286 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2457 transitions. [2022-12-13 16:57:33,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2457 transitions. [2022-12-13 16:57:33,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:33,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2457 transitions. [2022-12-13 16:57:33,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 102.375) internal successors, (2457), 24 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,292 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 324.0) internal successors, (8100), 25 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:33,292 INFO L175 Difference]: Start difference. First operand has 247 places, 776 transitions, 13306 flow. Second operand 24 states and 2457 transitions. [2022-12-13 16:57:33,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 889 transitions, 16422 flow [2022-12-13 16:57:34,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 889 transitions, 15025 flow, removed 580 selfloop flow, removed 17 redundant places. [2022-12-13 16:57:34,428 INFO L231 Difference]: Finished difference. Result has 255 places, 775 transitions, 13199 flow [2022-12-13 16:57:34,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=11877, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13199, PETRI_PLACES=255, PETRI_TRANSITIONS=775} [2022-12-13 16:57:34,429 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 224 predicate places. [2022-12-13 16:57:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 775 transitions, 13199 flow [2022-12-13 16:57:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 98.33333333333333) internal successors, (2655), 27 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:34,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:34,430 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:34,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 16:57:34,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 16:57:34,631 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:57:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash -417084899, now seen corresponding path program 3 times [2022-12-13 16:57:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:34,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815501868] [2022-12-13 16:57:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:34,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815501868] [2022-12-13 16:57:35,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815501868] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767370967] [2022-12-13 16:57:35,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:57:35,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:35,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:35,028 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:35,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 16:57:35,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:57:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 16:57:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:57:35,258 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 19 treesize of output 21 [2022-12-13 16:57:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:57:35,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:35,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:35,397 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 48 treesize of output 45 [2022-12-13 16:57:35,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-12-13 16:57:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:57:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767370967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:35,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:35,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2022-12-13 16:57:35,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898511088] [2022-12-13 16:57:35,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:35,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 16:57:35,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 16:57:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=483, Unknown=4, NotChecked=0, Total=552 [2022-12-13 16:57:35,650 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:57:35,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 775 transitions, 13199 flow. Second operand has 24 states, 24 states have (on average 101.58333333333333) internal successors, (2438), 24 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:35,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:35,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:57:35,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:36,037 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset 4))) (and (< 0 (+ (select (select |c_#memory_int| c_~q~0.base) .cse0) 1)) (forall ((v_ArrVal_1304 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1304) c_~q~0.base) .cse0) 1))))) is different from false [2022-12-13 16:57:39,092 INFO L130 PetriNetUnfolder]: 4820/8725 cut-off events. [2022-12-13 16:57:39,092 INFO L131 PetriNetUnfolder]: For 100305/100305 co-relation queries the response was YES. [2022-12-13 16:57:39,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68958 conditions, 8725 events. 4820/8725 cut-off events. For 100305/100305 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 67973 event pairs, 317 based on Foata normal form. 168/8757 useless extension candidates. Maximal degree in co-relation 68877. Up to 3075 conditions per place. [2022-12-13 16:57:39,155 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 368 selfloop transitions, 536 changer transitions 1/906 dead transitions. [2022-12-13 16:57:39,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 906 transitions, 16416 flow [2022-12-13 16:57:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:57:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 16:57:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2434 transitions. [2022-12-13 16:57:39,159 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3266237251744498 [2022-12-13 16:57:39,159 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2434 transitions. [2022-12-13 16:57:39,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2434 transitions. [2022-12-13 16:57:39,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:39,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2434 transitions. [2022-12-13 16:57:39,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.82608695652173) internal successors, (2434), 23 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:39,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:39,164 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 324.0) internal successors, (7776), 24 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:39,164 INFO L175 Difference]: Start difference. First operand has 255 places, 775 transitions, 13199 flow. Second operand 23 states and 2434 transitions. [2022-12-13 16:57:39,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 906 transitions, 16416 flow [2022-12-13 16:57:39,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 906 transitions, 15774 flow, removed 90 selfloop flow, removed 19 redundant places. [2022-12-13 16:57:39,985 INFO L231 Difference]: Finished difference. Result has 264 places, 825 transitions, 14662 flow [2022-12-13 16:57:39,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=12296, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14662, PETRI_PLACES=264, PETRI_TRANSITIONS=825} [2022-12-13 16:57:39,985 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 233 predicate places. [2022-12-13 16:57:39,985 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 825 transitions, 14662 flow [2022-12-13 16:57:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.58333333333333) internal successors, (2438), 24 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:39,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:39,986 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:39,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-13 16:57:40,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:40,187 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:57:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash 714588470, now seen corresponding path program 2 times [2022-12-13 16:57:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:40,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465250465] [2022-12-13 16:57:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:40,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465250465] [2022-12-13 16:57:40,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465250465] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278241420] [2022-12-13 16:57:40,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:57:40,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:40,996 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:40,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 16:57:41,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:57:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 16:57:41,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:57:41,235 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 19 treesize of output 21 [2022-12-13 16:57:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:57:41,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:41,334 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1347 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1347) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1)) is different from false [2022-12-13 16:57:41,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:41,342 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 44 treesize of output 41 [2022-12-13 16:57:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-13 16:57:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:57:41,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278241420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:41,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:41,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2022-12-13 16:57:41,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624310586] [2022-12-13 16:57:41,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:41,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:57:41,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:41,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:57:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2022-12-13 16:57:41,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:57:41,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 825 transitions, 14662 flow. Second operand has 27 states, 27 states have (on average 101.44444444444444) internal successors, (2739), 27 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:41,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:41,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:57:41,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:44,932 INFO L130 PetriNetUnfolder]: 4791/8703 cut-off events. [2022-12-13 16:57:44,932 INFO L131 PetriNetUnfolder]: For 110444/110444 co-relation queries the response was YES. [2022-12-13 16:57:44,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73805 conditions, 8703 events. 4791/8703 cut-off events. For 110444/110444 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 67390 event pairs, 728 based on Foata normal form. 61/8628 useless extension candidates. Maximal degree in co-relation 73719. Up to 8153 conditions per place. [2022-12-13 16:57:45,030 INFO L137 encePairwiseOnDemand]: 317/324 looper letters, 719 selfloop transitions, 99 changer transitions 46/865 dead transitions. [2022-12-13 16:57:45,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 865 transitions, 16786 flow [2022-12-13 16:57:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:57:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 16:57:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1784 transitions. [2022-12-13 16:57:45,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32389251997095136 [2022-12-13 16:57:45,034 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1784 transitions. [2022-12-13 16:57:45,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1784 transitions. [2022-12-13 16:57:45,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:57:45,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1784 transitions. [2022-12-13 16:57:45,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 104.94117647058823) internal successors, (1784), 17 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:45,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:45,040 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 324.0) internal successors, (5832), 18 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:45,040 INFO L175 Difference]: Start difference. First operand has 264 places, 825 transitions, 14662 flow. Second operand 17 states and 1784 transitions. [2022-12-13 16:57:45,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 865 transitions, 16786 flow [2022-12-13 16:57:46,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 865 transitions, 16130 flow, removed 102 selfloop flow, removed 14 redundant places. [2022-12-13 16:57:46,050 INFO L231 Difference]: Finished difference. Result has 266 places, 796 transitions, 13734 flow [2022-12-13 16:57:46,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=13925, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=13734, PETRI_PLACES=266, PETRI_TRANSITIONS=796} [2022-12-13 16:57:46,051 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2022-12-13 16:57:46,051 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 796 transitions, 13734 flow [2022-12-13 16:57:46,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 101.44444444444444) internal successors, (2739), 27 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:46,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:57:46,051 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:57:46,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 16:57:46,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:46,252 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:57:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:57:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash 990921786, now seen corresponding path program 11 times [2022-12-13 16:57:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:57:46,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170082383] [2022-12-13 16:57:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:57:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:57:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:57:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:47,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:57:47,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170082383] [2022-12-13 16:57:47,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170082383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:57:47,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2393824] [2022-12-13 16:57:47,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:57:47,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:57:47,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:57:47,296 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:57:47,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 16:57:47,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:57:47,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:57:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 16:57:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:57:47,482 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 16 treesize of output 12 [2022-12-13 16:57:47,512 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 [2022-12-13 16:57:47,548 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 [2022-12-13 16:57:47,580 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 [2022-12-13 16:57:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:47,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:57:48,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:48,825 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 2 case distinctions, treesize of input 227 treesize of output 132 [2022-12-13 16:57:48,884 INFO L321 Elim1Store]: treesize reduction 71, result has 41.3 percent of original size [2022-12-13 16:57:48,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 768 treesize of output 713 [2022-12-13 16:57:48,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:57:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:57:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:57:48,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:57:48,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:57:48,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:57:48,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:57:48,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 546 treesize of output 508 [2022-12-13 16:57:48,980 INFO L321 Elim1Store]: treesize reduction 78, result has 35.5 percent of original size [2022-12-13 16:57:48,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 584 treesize of output 466 [2022-12-13 16:57:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:57:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2393824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:57:49,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:57:49,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-13 16:57:49,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198799115] [2022-12-13 16:57:49,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:57:49,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 16:57:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:57:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 16:57:49,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1126, Unknown=3, NotChecked=0, Total=1406 [2022-12-13 16:57:50,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:57:50,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 796 transitions, 13734 flow. Second operand has 38 states, 38 states have (on average 98.1842105263158) internal successors, (3731), 38 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:57:50,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:57:50,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:57:50,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:57:53,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:03,283 INFO L130 PetriNetUnfolder]: 5251/9553 cut-off events. [2022-12-13 16:58:03,283 INFO L131 PetriNetUnfolder]: For 109506/109506 co-relation queries the response was YES. [2022-12-13 16:58:03,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79218 conditions, 9553 events. 5251/9553 cut-off events. For 109506/109506 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 75592 event pairs, 567 based on Foata normal form. 56/9427 useless extension candidates. Maximal degree in co-relation 79134. Up to 4684 conditions per place. [2022-12-13 16:58:03,358 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 554 selfloop transitions, 613 changer transitions 6/1174 dead transitions. [2022-12-13 16:58:03,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1174 transitions, 21187 flow [2022-12-13 16:58:03,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 16:58:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-13 16:58:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6582 transitions. [2022-12-13 16:58:03,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3125356125356125 [2022-12-13 16:58:03,364 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6582 transitions. [2022-12-13 16:58:03,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6582 transitions. [2022-12-13 16:58:03,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:03,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6582 transitions. [2022-12-13 16:58:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 101.26153846153846) internal successors, (6582), 65 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:03,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 324.0) internal successors, (21384), 66 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:03,380 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 324.0) internal successors, (21384), 66 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:03,380 INFO L175 Difference]: Start difference. First operand has 266 places, 796 transitions, 13734 flow. Second operand 65 states and 6582 transitions. [2022-12-13 16:58:03,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1174 transitions, 21187 flow [2022-12-13 16:58:04,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1174 transitions, 20443 flow, removed 110 selfloop flow, removed 12 redundant places. [2022-12-13 16:58:04,358 INFO L231 Difference]: Finished difference. Result has 325 places, 1057 transitions, 19414 flow [2022-12-13 16:58:04,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=13088, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=19414, PETRI_PLACES=325, PETRI_TRANSITIONS=1057} [2022-12-13 16:58:04,359 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 294 predicate places. [2022-12-13 16:58:04,359 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1057 transitions, 19414 flow [2022-12-13 16:58:04,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 98.1842105263158) internal successors, (3731), 38 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:04,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:04,359 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:04,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-13 16:58:04,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 16:58:04,560 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:58:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1684157182, now seen corresponding path program 12 times [2022-12-13 16:58:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:04,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970040614] [2022-12-13 16:58:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:05,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:05,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970040614] [2022-12-13 16:58:05,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970040614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:05,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820266437] [2022-12-13 16:58:05,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:58:05,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:05,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:05,555 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:05,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 16:58:05,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 16:58:05,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:05,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 16:58:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:05,751 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 13 treesize of output 9 [2022-12-13 16:58:05,783 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 6 treesize of output 5 [2022-12-13 16:58:05,814 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 [2022-12-13 16:58:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:06,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:06,820 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 179 treesize of output 119 [2022-12-13 16:58:06,880 INFO L321 Elim1Store]: treesize reduction 43, result has 64.5 percent of original size [2022-12-13 16:58:06,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 364 treesize of output 389 [2022-12-13 16:58:06,943 INFO L321 Elim1Store]: treesize reduction 50, result has 58.7 percent of original size [2022-12-13 16:58:06,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 312 treesize of output 302 [2022-12-13 16:58:06,992 INFO L321 Elim1Store]: treesize reduction 50, result has 58.7 percent of original size [2022-12-13 16:58:06,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 205 treesize of output 235 [2022-12-13 16:58:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:08,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820266437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:08,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:08,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-13 16:58:08,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665373411] [2022-12-13 16:58:08,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 16:58:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:08,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 16:58:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1154, Unknown=2, NotChecked=0, Total=1406 [2022-12-13 16:58:10,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:58:11,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 16:58:11,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1057 transitions, 19414 flow. Second operand has 38 states, 38 states have (on average 98.1842105263158) internal successors, (3731), 38 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:11,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:11,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 16:58:11,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:21,836 INFO L130 PetriNetUnfolder]: 5587/10351 cut-off events. [2022-12-13 16:58:21,836 INFO L131 PetriNetUnfolder]: For 133756/133756 co-relation queries the response was YES. [2022-12-13 16:58:21,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89990 conditions, 10351 events. 5587/10351 cut-off events. For 133756/133756 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 85030 event pairs, 619 based on Foata normal form. 26/10171 useless extension candidates. Maximal degree in co-relation 89891. Up to 5416 conditions per place. [2022-12-13 16:58:21,926 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 735 selfloop transitions, 738 changer transitions 1/1475 dead transitions. [2022-12-13 16:58:21,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1475 transitions, 28600 flow [2022-12-13 16:58:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 16:58:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 16:58:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6927 transitions. [2022-12-13 16:58:21,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3144063180827887 [2022-12-13 16:58:21,949 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6927 transitions. [2022-12-13 16:58:21,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6927 transitions. [2022-12-13 16:58:21,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:21,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6927 transitions. [2022-12-13 16:58:21,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 101.86764705882354) internal successors, (6927), 68 states have internal predecessors, (6927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:21,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 324.0) internal successors, (22356), 69 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:21,967 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 324.0) internal successors, (22356), 69 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:21,967 INFO L175 Difference]: Start difference. First operand has 325 places, 1057 transitions, 19414 flow. Second operand 68 states and 6927 transitions. [2022-12-13 16:58:21,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1475 transitions, 28600 flow [2022-12-13 16:58:23,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1475 transitions, 26913 flow, removed 800 selfloop flow, removed 18 redundant places. [2022-12-13 16:58:23,406 INFO L231 Difference]: Finished difference. Result has 396 places, 1342 transitions, 25447 flow [2022-12-13 16:58:23,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=18197, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=25447, PETRI_PLACES=396, PETRI_TRANSITIONS=1342} [2022-12-13 16:58:23,406 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 365 predicate places. [2022-12-13 16:58:23,407 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1342 transitions, 25447 flow [2022-12-13 16:58:23,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 98.1842105263158) internal successors, (3731), 38 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:23,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:23,407 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:23,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 16:58:23,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 16:58:23,608 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:58:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1750097819, now seen corresponding path program 4 times [2022-12-13 16:58:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:23,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858666211] [2022-12-13 16:58:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:23,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:24,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858666211] [2022-12-13 16:58:24,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858666211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531454396] [2022-12-13 16:58:24,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:58:24,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:24,005 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:24,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 16:58:24,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:58:24,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:24,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 16:58:24,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:24,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:24,380 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-13 16:58:24,380 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 [2022-12-13 16:58:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:24,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531454396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:24,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:24,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-13 16:58:24,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702618746] [2022-12-13 16:58:24,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:24,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:58:24,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:58:24,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:58:25,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 324 [2022-12-13 16:58:25,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1342 transitions, 25447 flow. Second operand has 32 states, 32 states have (on average 120.40625) internal successors, (3853), 32 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) [2022-12-13 16:58:25,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:25,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 324 [2022-12-13 16:58:25,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:32,413 INFO L130 PetriNetUnfolder]: 6176/11558 cut-off events. [2022-12-13 16:58:32,413 INFO L131 PetriNetUnfolder]: For 173574/173574 co-relation queries the response was YES. [2022-12-13 16:58:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104101 conditions, 11558 events. 6176/11558 cut-off events. For 173574/173574 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 97984 event pairs, 265 based on Foata normal form. 90/11484 useless extension candidates. Maximal degree in co-relation 103983. Up to 4462 conditions per place. [2022-12-13 16:58:32,569 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 394 selfloop transitions, 1263 changer transitions 24/1682 dead transitions. [2022-12-13 16:58:32,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1682 transitions, 33874 flow [2022-12-13 16:58:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 16:58:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 16:58:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5888 transitions. [2022-12-13 16:58:32,573 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3866561597058051 [2022-12-13 16:58:32,573 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5888 transitions. [2022-12-13 16:58:32,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5888 transitions. [2022-12-13 16:58:32,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:32,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5888 transitions. [2022-12-13 16:58:32,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 125.27659574468085) internal successors, (5888), 47 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:32,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 324.0) internal successors, (15552), 48 states have internal predecessors, (15552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:32,585 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 324.0) internal successors, (15552), 48 states have internal predecessors, (15552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:32,585 INFO L175 Difference]: Start difference. First operand has 396 places, 1342 transitions, 25447 flow. Second operand 47 states and 5888 transitions. [2022-12-13 16:58:32,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1682 transitions, 33874 flow [2022-12-13 16:58:34,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1682 transitions, 32637 flow, removed 569 selfloop flow, removed 19 redundant places. [2022-12-13 16:58:34,878 INFO L231 Difference]: Finished difference. Result has 434 places, 1501 transitions, 31004 flow [2022-12-13 16:58:34,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=24405, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31004, PETRI_PLACES=434, PETRI_TRANSITIONS=1501} [2022-12-13 16:58:34,879 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 403 predicate places. [2022-12-13 16:58:34,879 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1501 transitions, 31004 flow [2022-12-13 16:58:34,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 120.40625) internal successors, (3853), 32 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) [2022-12-13 16:58:34,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:34,880 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:34,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 16:58:35,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:35,081 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:58:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1851634023, now seen corresponding path program 3 times [2022-12-13 16:58:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:35,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914873768] [2022-12-13 16:58:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:35,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914873768] [2022-12-13 16:58:35,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914873768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:35,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756855672] [2022-12-13 16:58:35,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:58:35,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:35,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:35,779 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:35,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 16:58:35,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:58:35,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 16:58:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:58:36,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:36,097 INFO L321 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2022-12-13 16:58:36,097 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 25 treesize of output 17 [2022-12-13 16:58:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:58:36,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756855672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:36,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:36,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 20 [2022-12-13 16:58:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579570429] [2022-12-13 16:58:36,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 16:58:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 16:58:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-12-13 16:58:36,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-12-13 16:58:36,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1501 transitions, 31004 flow. Second operand has 22 states, 22 states have (on average 122.45454545454545) internal successors, (2694), 22 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:36,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:36,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-12-13 16:58:36,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:43,478 INFO L130 PetriNetUnfolder]: 6320/11944 cut-off events. [2022-12-13 16:58:43,479 INFO L131 PetriNetUnfolder]: For 207174/207174 co-relation queries the response was YES. [2022-12-13 16:58:43,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114422 conditions, 11944 events. 6320/11944 cut-off events. For 207174/207174 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 102583 event pairs, 614 based on Foata normal form. 88/11860 useless extension candidates. Maximal degree in co-relation 114293. Up to 7724 conditions per place. [2022-12-13 16:58:43,606 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 909 selfloop transitions, 714 changer transitions 136/1760 dead transitions. [2022-12-13 16:58:43,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1760 transitions, 38452 flow [2022-12-13 16:58:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 16:58:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 16:58:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4300 transitions. [2022-12-13 16:58:43,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39034132171387076 [2022-12-13 16:58:43,610 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4300 transitions. [2022-12-13 16:58:43,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4300 transitions. [2022-12-13 16:58:43,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:43,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4300 transitions. [2022-12-13 16:58:43,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 126.47058823529412) internal successors, (4300), 34 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:43,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 324.0) internal successors, (11340), 35 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:43,620 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 324.0) internal successors, (11340), 35 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:43,620 INFO L175 Difference]: Start difference. First operand has 434 places, 1501 transitions, 31004 flow. Second operand 34 states and 4300 transitions. [2022-12-13 16:58:43,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1760 transitions, 38452 flow [2022-12-13 16:58:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1760 transitions, 36973 flow, removed 288 selfloop flow, removed 15 redundant places. [2022-12-13 16:58:46,461 INFO L231 Difference]: Finished difference. Result has 459 places, 1514 transitions, 31550 flow [2022-12-13 16:58:46,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=29594, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=31550, PETRI_PLACES=459, PETRI_TRANSITIONS=1514} [2022-12-13 16:58:46,461 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 428 predicate places. [2022-12-13 16:58:46,462 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1514 transitions, 31550 flow [2022-12-13 16:58:46,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 122.45454545454545) internal successors, (2694), 22 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:46,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:46,462 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:46,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 16:58:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 16:58:46,663 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:58:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1124378406, now seen corresponding path program 4 times [2022-12-13 16:58:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158794704] [2022-12-13 16:58:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:47,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:47,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158794704] [2022-12-13 16:58:47,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158794704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789823055] [2022-12-13 16:58:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:58:47,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:47,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:47,387 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:47,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 16:58:47,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:58:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:58:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 16:58:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:47,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:47,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:47,780 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 23 [2022-12-13 16:58:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:48,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789823055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:48,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:48,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-13 16:58:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763569559] [2022-12-13 16:58:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 16:58:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 16:58:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 16:58:49,244 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 324 [2022-12-13 16:58:49,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1514 transitions, 31550 flow. Second operand has 33 states, 33 states have (on average 120.36363636363636) internal successors, (3972), 33 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:49,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:49,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 324 [2022-12-13 16:58:49,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:58:54,100 INFO L130 PetriNetUnfolder]: 3709/6776 cut-off events. [2022-12-13 16:58:54,100 INFO L131 PetriNetUnfolder]: For 125030/125030 co-relation queries the response was YES. [2022-12-13 16:58:54,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67990 conditions, 6776 events. 3709/6776 cut-off events. For 125030/125030 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 50063 event pairs, 218 based on Foata normal form. 273/6937 useless extension candidates. Maximal degree in co-relation 67859. Up to 4250 conditions per place. [2022-12-13 16:58:54,167 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 428 selfloop transitions, 540 changer transitions 17/986 dead transitions. [2022-12-13 16:58:54,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 986 transitions, 21139 flow [2022-12-13 16:58:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 16:58:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 16:58:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 5237 transitions. [2022-12-13 16:58:54,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38484714873603765 [2022-12-13 16:58:54,171 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 5237 transitions. [2022-12-13 16:58:54,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 5237 transitions. [2022-12-13 16:58:54,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:58:54,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 5237 transitions. [2022-12-13 16:58:54,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 124.69047619047619) internal successors, (5237), 42 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:54,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 324.0) internal successors, (13932), 43 states have internal predecessors, (13932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:54,182 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 324.0) internal successors, (13932), 43 states have internal predecessors, (13932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:54,182 INFO L175 Difference]: Start difference. First operand has 459 places, 1514 transitions, 31550 flow. Second operand 42 states and 5237 transitions. [2022-12-13 16:58:54,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 986 transitions, 21139 flow [2022-12-13 16:58:55,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 986 transitions, 19869 flow, removed 129 selfloop flow, removed 42 redundant places. [2022-12-13 16:58:55,385 INFO L231 Difference]: Finished difference. Result has 413 places, 864 transitions, 18265 flow [2022-12-13 16:58:55,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=16149, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=18265, PETRI_PLACES=413, PETRI_TRANSITIONS=864} [2022-12-13 16:58:55,386 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 382 predicate places. [2022-12-13 16:58:55,386 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 864 transitions, 18265 flow [2022-12-13 16:58:55,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 120.36363636363636) internal successors, (3972), 33 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:55,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:58:55,387 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:58:55,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-13 16:58:55,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 16:58:55,588 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:58:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:58:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 950166062, now seen corresponding path program 13 times [2022-12-13 16:58:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:58:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190728744] [2022-12-13 16:58:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:58:55,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:58:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:58:56,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:58:56,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190728744] [2022-12-13 16:58:56,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190728744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:58:56,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658281622] [2022-12-13 16:58:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:58:56,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:58:56,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:58:56,366 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:58:56,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 16:58:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:58:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 16:58:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:58:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:58:56,563 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 19 treesize of output 21 [2022-12-13 16:58:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:58:56,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:58:57,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:57,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 148 treesize of output 216 [2022-12-13 16:58:57,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:58:57,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 127 [2022-12-13 16:58:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 16:58:58,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658281622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:58:58,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:58:58,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 32 [2022-12-13 16:58:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51949564] [2022-12-13 16:58:58,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:58:58,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 16:58:58,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:58:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 16:58:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1009, Unknown=2, NotChecked=0, Total=1122 [2022-12-13 16:58:58,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 16:58:58,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 864 transitions, 18265 flow. Second operand has 34 states, 34 states have (on average 101.26470588235294) internal successors, (3443), 34 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:58:58,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:58:58,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 16:58:58,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:59:01,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:04,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:30,166 WARN L233 SmtUtils]: Spent 22.50s on a formula simplification. DAG size of input: 87 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:59:32,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:59:35,732 INFO L130 PetriNetUnfolder]: 4194/7619 cut-off events. [2022-12-13 16:59:35,732 INFO L131 PetriNetUnfolder]: For 142557/142557 co-relation queries the response was YES. [2022-12-13 16:59:35,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76046 conditions, 7619 events. 4194/7619 cut-off events. For 142557/142557 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 56858 event pairs, 192 based on Foata normal form. 130/7483 useless extension candidates. Maximal degree in co-relation 75941. Up to 3519 conditions per place. [2022-12-13 16:59:35,821 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 435 selfloop transitions, 788 changer transitions 6/1230 dead transitions. [2022-12-13 16:59:35,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1230 transitions, 26502 flow [2022-12-13 16:59:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-13 16:59:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-12-13 16:59:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 8386 transitions. [2022-12-13 16:59:35,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32353395061728396 [2022-12-13 16:59:35,828 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 8386 transitions. [2022-12-13 16:59:35,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 8386 transitions. [2022-12-13 16:59:35,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:59:35,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 8386 transitions. [2022-12-13 16:59:35,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 104.825) internal successors, (8386), 80 states have internal predecessors, (8386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:59:35,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 324.0) internal successors, (26244), 81 states have internal predecessors, (26244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:59:35,850 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 324.0) internal successors, (26244), 81 states have internal predecessors, (26244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:59:35,850 INFO L175 Difference]: Start difference. First operand has 413 places, 864 transitions, 18265 flow. Second operand 80 states and 8386 transitions. [2022-12-13 16:59:35,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1230 transitions, 26502 flow [2022-12-13 16:59:37,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1230 transitions, 24759 flow, removed 123 selfloop flow, removed 25 redundant places. [2022-12-13 16:59:37,378 INFO L231 Difference]: Finished difference. Result has 481 places, 1044 transitions, 22813 flow [2022-12-13 16:59:37,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=16738, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=22813, PETRI_PLACES=481, PETRI_TRANSITIONS=1044} [2022-12-13 16:59:37,379 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 450 predicate places. [2022-12-13 16:59:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1044 transitions, 22813 flow [2022-12-13 16:59:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 101.26470588235294) internal successors, (3443), 34 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:59:37,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:59:37,379 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:59:37,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-13 16:59:37,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 16:59:37,581 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 16:59:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:59:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash 950166004, now seen corresponding path program 5 times [2022-12-13 16:59:37,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:59:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732534676] [2022-12-13 16:59:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:59:37,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:59:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:59:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:59:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:59:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732534676] [2022-12-13 16:59:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732534676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:59:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248240683] [2022-12-13 16:59:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:59:37,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:59:37,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:59:37,905 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:59:37,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 16:59:38,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 16:59:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:59:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 16:59:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:59:38,109 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 [2022-12-13 16:59:38,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:59:38,164 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 [2022-12-13 16:59:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:59:38,291 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 32 treesize of output 32 [2022-12-13 16:59:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:59:38,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:59:39,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:39,648 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 384 treesize of output 241 [2022-12-13 16:59:39,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:39,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1397 treesize of output 1327 [2022-12-13 16:59:39,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:39,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1175 treesize of output 1170 [2022-12-13 16:59:39,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:39,814 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 1089 treesize of output 970 [2022-12-13 16:59:39,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:39,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 929 treesize of output 936 [2022-12-13 16:59:39,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:59:39,922 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 855 treesize of output 760 [2022-12-13 17:00:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:05,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248240683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:00:05,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:00:05,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 34 [2022-12-13 17:00:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799664414] [2022-12-13 17:00:05,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:00:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:00:05,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:00:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1097, Unknown=4, NotChecked=0, Total=1260 [2022-12-13 17:00:08,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 17:00:08,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1044 transitions, 22813 flow. Second operand has 36 states, 36 states have (on average 98.25) internal successors, (3537), 36 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:08,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:08,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 17:00:08,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:19,603 INFO L130 PetriNetUnfolder]: 4738/8617 cut-off events. [2022-12-13 17:00:19,603 INFO L131 PetriNetUnfolder]: For 188906/188906 co-relation queries the response was YES. [2022-12-13 17:00:19,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89779 conditions, 8617 events. 4738/8617 cut-off events. For 188906/188906 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 66695 event pairs, 1075 based on Foata normal form. 26/8429 useless extension candidates. Maximal degree in co-relation 89655. Up to 7068 conditions per place. [2022-12-13 17:00:19,700 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 974 selfloop transitions, 257 changer transitions 32/1264 dead transitions. [2022-12-13 17:00:19,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 1264 transitions, 28828 flow [2022-12-13 17:00:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 17:00:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-13 17:00:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5451 transitions. [2022-12-13 17:00:19,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31155692729766804 [2022-12-13 17:00:19,705 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5451 transitions. [2022-12-13 17:00:19,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5451 transitions. [2022-12-13 17:00:19,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:19,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5451 transitions. [2022-12-13 17:00:19,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 100.94444444444444) internal successors, (5451), 54 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:19,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 324.0) internal successors, (17820), 55 states have internal predecessors, (17820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:19,720 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 324.0) internal successors, (17820), 55 states have internal predecessors, (17820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:19,720 INFO L175 Difference]: Start difference. First operand has 481 places, 1044 transitions, 22813 flow. Second operand 54 states and 5451 transitions. [2022-12-13 17:00:19,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 1264 transitions, 28828 flow [2022-12-13 17:00:22,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1264 transitions, 26701 flow, removed 837 selfloop flow, removed 31 redundant places. [2022-12-13 17:00:22,242 INFO L231 Difference]: Finished difference. Result has 507 places, 1098 transitions, 22971 flow [2022-12-13 17:00:22,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=20924, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=22971, PETRI_PLACES=507, PETRI_TRANSITIONS=1098} [2022-12-13 17:00:22,242 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 476 predicate places. [2022-12-13 17:00:22,243 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1098 transitions, 22971 flow [2022-12-13 17:00:22,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 98.25) internal successors, (3537), 36 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:22,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:22,243 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:22,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 17:00:22,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 17:00:22,444 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:00:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2055609670, now seen corresponding path program 5 times [2022-12-13 17:00:22,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:22,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211435775] [2022-12-13 17:00:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:23,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211435775] [2022-12-13 17:00:23,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211435775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:00:23,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731119116] [2022-12-13 17:00:23,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:00:23,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:00:23,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:00:23,443 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:00:23,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 17:00:23,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:00:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:00:23,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 17:00:23,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:00:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:00:23,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:00:24,034 INFO L321 Elim1Store]: treesize reduction 19, result has 65.5 percent of original size [2022-12-13 17:00:24,035 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 105 treesize of output 69 [2022-12-13 17:00:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:00:24,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731119116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:00:24,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:00:24,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 6] total 26 [2022-12-13 17:00:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023312994] [2022-12-13 17:00:24,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:00:24,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 17:00:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 17:00:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-12-13 17:00:26,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 324 [2022-12-13 17:00:26,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1098 transitions, 22971 flow. Second operand has 28 states, 28 states have (on average 117.39285714285714) internal successors, (3287), 28 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:26,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:26,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 324 [2022-12-13 17:00:26,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:32,267 INFO L130 PetriNetUnfolder]: 6101/11160 cut-off events. [2022-12-13 17:00:32,267 INFO L131 PetriNetUnfolder]: For 250209/250209 co-relation queries the response was YES. [2022-12-13 17:00:32,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114233 conditions, 11160 events. 6101/11160 cut-off events. For 250209/250209 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 90552 event pairs, 454 based on Foata normal form. 316/11302 useless extension candidates. Maximal degree in co-relation 114104. Up to 5668 conditions per place. [2022-12-13 17:00:32,391 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 741 selfloop transitions, 1054 changer transitions 63/1859 dead transitions. [2022-12-13 17:00:32,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 1859 transitions, 42936 flow [2022-12-13 17:00:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 17:00:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 17:00:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4645 transitions. [2022-12-13 17:00:32,396 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37727420402859 [2022-12-13 17:00:32,396 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4645 transitions. [2022-12-13 17:00:32,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4645 transitions. [2022-12-13 17:00:32,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:32,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4645 transitions. [2022-12-13 17:00:32,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 122.23684210526316) internal successors, (4645), 38 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:32,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:32,406 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 324.0) internal successors, (12636), 39 states have internal predecessors, (12636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:32,406 INFO L175 Difference]: Start difference. First operand has 507 places, 1098 transitions, 22971 flow. Second operand 38 states and 4645 transitions. [2022-12-13 17:00:32,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 1859 transitions, 42936 flow [2022-12-13 17:00:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1859 transitions, 42035 flow, removed 147 selfloop flow, removed 42 redundant places. [2022-12-13 17:00:35,478 INFO L231 Difference]: Finished difference. Result has 511 places, 1576 transitions, 38340 flow [2022-12-13 17:00:35,478 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=21434, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=38340, PETRI_PLACES=511, PETRI_TRANSITIONS=1576} [2022-12-13 17:00:35,478 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 480 predicate places. [2022-12-13 17:00:35,478 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1576 transitions, 38340 flow [2022-12-13 17:00:35,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 117.39285714285714) internal successors, (3287), 28 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:35,479 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:35,479 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:35,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-13 17:00:35,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 17:00:35,680 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:00:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:35,681 INFO L85 PathProgramCache]: Analyzing trace with hash -587496273, now seen corresponding path program 14 times [2022-12-13 17:00:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:35,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990716471] [2022-12-13 17:00:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:35,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990716471] [2022-12-13 17:00:37,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990716471] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:00:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825269917] [2022-12-13 17:00:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:00:37,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:00:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:00:37,270 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:00:37,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 17:00:37,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:00:37,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:00:37,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 17:00:37,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:00:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:00:37,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:00:38,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:00:38,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 140 [2022-12-13 17:00:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:00:38,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825269917] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:00:38,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:00:38,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 29 [2022-12-13 17:00:38,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419551296] [2022-12-13 17:00:38,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:00:38,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 17:00:38,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:38,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 17:00:38,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:00:41,700 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 324 [2022-12-13 17:00:41,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1576 transitions, 38340 flow. Second operand has 31 states, 31 states have (on average 117.35483870967742) internal successors, (3638), 31 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:41,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:41,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 324 [2022-12-13 17:00:41,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:00:50,651 INFO L130 PetriNetUnfolder]: 6371/11556 cut-off events. [2022-12-13 17:00:50,651 INFO L131 PetriNetUnfolder]: For 358306/358306 co-relation queries the response was YES. [2022-12-13 17:00:50,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130045 conditions, 11556 events. 6371/11556 cut-off events. For 358306/358306 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 92544 event pairs, 1027 based on Foata normal form. 316/11750 useless extension candidates. Maximal degree in co-relation 129896. Up to 7803 conditions per place. [2022-12-13 17:00:50,830 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 1198 selfloop transitions, 715 changer transitions 57/1970 dead transitions. [2022-12-13 17:00:50,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1970 transitions, 50358 flow [2022-12-13 17:00:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:00:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 17:00:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5327 transitions. [2022-12-13 17:00:50,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3736672278338945 [2022-12-13 17:00:50,835 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5327 transitions. [2022-12-13 17:00:50,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5327 transitions. [2022-12-13 17:00:50,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:00:50,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5327 transitions. [2022-12-13 17:00:50,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 121.06818181818181) internal successors, (5327), 44 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:50,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 324.0) internal successors, (14580), 45 states have internal predecessors, (14580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:50,845 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 324.0) internal successors, (14580), 45 states have internal predecessors, (14580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:50,846 INFO L175 Difference]: Start difference. First operand has 511 places, 1576 transitions, 38340 flow. Second operand 44 states and 5327 transitions. [2022-12-13 17:00:50,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1970 transitions, 50358 flow [2022-12-13 17:00:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1970 transitions, 47759 flow, removed 1153 selfloop flow, removed 27 redundant places. [2022-12-13 17:00:56,500 INFO L231 Difference]: Finished difference. Result has 542 places, 1757 transitions, 43163 flow [2022-12-13 17:00:56,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=36411, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=939, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=43163, PETRI_PLACES=542, PETRI_TRANSITIONS=1757} [2022-12-13 17:00:56,501 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 511 predicate places. [2022-12-13 17:00:56,501 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 1757 transitions, 43163 flow [2022-12-13 17:00:56,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 117.35483870967742) internal successors, (3638), 31 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:56,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:00:56,501 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:00:56,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-13 17:00:56,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:00:56,703 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:00:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:00:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1202966383, now seen corresponding path program 15 times [2022-12-13 17:00:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:00:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006704497] [2022-12-13 17:00:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:00:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:00:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:00:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:00:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:00:58,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006704497] [2022-12-13 17:00:58,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006704497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:00:58,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903491253] [2022-12-13 17:00:58,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:00:58,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:00:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:00:58,027 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:00:58,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 17:00:58,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:00:58,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:00:58,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 17:00:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:00:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:00:58,365 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 31 treesize of output 31 [2022-12-13 17:00:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:00:58,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:00:58,709 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1755 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1755) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset 8)))) 2147483648)))) is different from false [2022-12-13 17:00:58,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:00:58,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 127 treesize of output 195 [2022-12-13 17:00:58,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:00:58,837 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 56 treesize of output 69 [2022-12-13 17:00:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:00:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903491253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:00:59,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:00:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2022-12-13 17:00:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067820875] [2022-12-13 17:00:59,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:00:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:00:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:00:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:00:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=898, Unknown=1, NotChecked=60, Total=1056 [2022-12-13 17:00:59,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 17:00:59,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 1757 transitions, 43163 flow. Second operand has 33 states, 33 states have (on average 101.27272727272727) internal successors, (3342), 33 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:00:59,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:00:59,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 17:00:59,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:01:04,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:01:16,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:01:18,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:01:29,014 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:01:31,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:01:35,254 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~q_front~0 4))) (let ((.cse4 (+ .cse10 c_~q~0.offset)) (.cse3 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse5 (+ .cse10 c_~q~0.offset 4)) (.cse9 (select |c_#memory_int| c_~q~0.base)) (.cse6 (+ .cse10 c_~q~0.offset 8))) (let ((.cse7 (select .cse9 .cse6)) (.cse1 (select .cse9 .cse5)) (.cse8 (not (= (select .cse9 .cse3) 1))) (.cse0 (select .cse9 .cse4))) (and (<= c_~s~0 2) (< (+ c_~s~0 .cse0 .cse1) 2147483648) (forall ((v_ArrVal_1755 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1755) c_~q~0.base))) (or (not (= (select .cse2 .cse3) 1)) (< (+ (select .cse2 .cse4) (select .cse2 .cse5) (select .cse2 .cse6)) 2147483648)))) (= c_~q~0.offset 0) (or (< (+ c_~s~0 .cse0 .cse7 .cse1) 2147483648) .cse8) (or (< (+ .cse0 .cse7 .cse1) 2147483648) .cse8) (= .cse0 1))))) is different from false [2022-12-13 17:01:37,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:01:48,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:01:54,605 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 67 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:01:57,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:07,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:09,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:02:59,146 WARN L233 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 68 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:03:01,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:03,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:10,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:37,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:50,713 WARN L233 SmtUtils]: Spent 12.36s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:03:52,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:03:54,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:04:05,520 WARN L233 SmtUtils]: Spent 10.20s on a formula simplification. DAG size of input: 64 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:04:31,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:04:46,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:04:48,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:04:49,943 INFO L130 PetriNetUnfolder]: 7736/13710 cut-off events. [2022-12-13 17:04:49,943 INFO L131 PetriNetUnfolder]: For 500139/500161 co-relation queries the response was YES. [2022-12-13 17:04:50,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162071 conditions, 13710 events. 7736/13710 cut-off events. For 500139/500161 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 109517 event pairs, 260 based on Foata normal form. 231/13745 useless extension candidates. Maximal degree in co-relation 161906. Up to 5936 conditions per place. [2022-12-13 17:04:50,135 INFO L137 encePairwiseOnDemand]: 312/324 looper letters, 665 selfloop transitions, 2195 changer transitions 8/2871 dead transitions. [2022-12-13 17:04:50,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 2871 transitions, 75973 flow [2022-12-13 17:04:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-12-13 17:04:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-12-13 17:04:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 10315 transitions. [2022-12-13 17:04:50,143 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32486142605190227 [2022-12-13 17:04:50,143 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 10315 transitions. [2022-12-13 17:04:50,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 10315 transitions. [2022-12-13 17:04:50,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:04:50,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 10315 transitions. [2022-12-13 17:04:50,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 105.25510204081633) internal successors, (10315), 98 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:04:50,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 324.0) internal successors, (32076), 99 states have internal predecessors, (32076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:04:50,169 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 324.0) internal successors, (32076), 99 states have internal predecessors, (32076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:04:50,169 INFO L175 Difference]: Start difference. First operand has 542 places, 1757 transitions, 43163 flow. Second operand 98 states and 10315 transitions. [2022-12-13 17:04:50,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 2871 transitions, 75973 flow [2022-12-13 17:04:57,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 2871 transitions, 74922 flow, removed 461 selfloop flow, removed 12 redundant places. [2022-12-13 17:04:57,690 INFO L231 Difference]: Finished difference. Result has 657 places, 2702 transitions, 74282 flow [2022-12-13 17:04:57,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=42256, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=74282, PETRI_PLACES=657, PETRI_TRANSITIONS=2702} [2022-12-13 17:04:57,692 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 626 predicate places. [2022-12-13 17:04:57,692 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 2702 transitions, 74282 flow [2022-12-13 17:04:57,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 101.27272727272727) internal successors, (3342), 33 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:04:57,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:04:57,693 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:04:57,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-13 17:04:57,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-12-13 17:04:57,894 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:04:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:04:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1867265880, now seen corresponding path program 16 times [2022-12-13 17:04:57,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:04:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092991906] [2022-12-13 17:04:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:04:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:04:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:04:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:04:58,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:04:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092991906] [2022-12-13 17:04:58,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092991906] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:04:58,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270050485] [2022-12-13 17:04:58,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:04:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:04:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:04:58,858 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:04:58,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 17:04:58,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:04:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:04:58,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 17:04:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:04:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:04:59,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:04:59,566 INFO L321 Elim1Store]: treesize reduction 29, result has 76.0 percent of original size [2022-12-13 17:04:59,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 110 [2022-12-13 17:04:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 17:04:59,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270050485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:04:59,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:04:59,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 31 [2022-12-13 17:04:59,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129377189] [2022-12-13 17:04:59,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:04:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:04:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:04:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:04:59,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:05:01,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 324 [2022-12-13 17:05:01,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 2702 transitions, 74282 flow. Second operand has 33 states, 33 states have (on average 112.36363636363636) internal successors, (3708), 33 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:01,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:05:01,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 324 [2022-12-13 17:05:01,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:05:16,938 INFO L130 PetriNetUnfolder]: 8711/15528 cut-off events. [2022-12-13 17:05:16,938 INFO L131 PetriNetUnfolder]: For 1141940/1141940 co-relation queries the response was YES. [2022-12-13 17:05:17,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233969 conditions, 15528 events. 8711/15528 cut-off events. For 1141940/1141940 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 127835 event pairs, 393 based on Foata normal form. 50/15378 useless extension candidates. Maximal degree in co-relation 233769. Up to 6012 conditions per place. [2022-12-13 17:05:17,202 INFO L137 encePairwiseOnDemand]: 313/324 looper letters, 1389 selfloop transitions, 1925 changer transitions 42/3356 dead transitions. [2022-12-13 17:05:17,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 3356 transitions, 98987 flow [2022-12-13 17:05:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:05:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-13 17:05:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5769 transitions. [2022-12-13 17:05:17,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3561111111111111 [2022-12-13 17:05:17,207 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5769 transitions. [2022-12-13 17:05:17,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5769 transitions. [2022-12-13 17:05:17,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:05:17,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5769 transitions. [2022-12-13 17:05:17,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 115.38) internal successors, (5769), 50 states have internal predecessors, (5769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:17,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 324.0) internal successors, (16524), 51 states have internal predecessors, (16524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:17,219 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 324.0) internal successors, (16524), 51 states have internal predecessors, (16524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:17,219 INFO L175 Difference]: Start difference. First operand has 657 places, 2702 transitions, 74282 flow. Second operand 50 states and 5769 transitions. [2022-12-13 17:05:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 3356 transitions, 98987 flow [2022-12-13 17:05:36,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 3356 transitions, 87173 flow, removed 5600 selfloop flow, removed 18 redundant places. [2022-12-13 17:05:36,537 INFO L231 Difference]: Finished difference. Result has 695 places, 3082 transitions, 80560 flow [2022-12-13 17:05:36,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=64961, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=80560, PETRI_PLACES=695, PETRI_TRANSITIONS=3082} [2022-12-13 17:05:36,538 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 664 predicate places. [2022-12-13 17:05:36,538 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 3082 transitions, 80560 flow [2022-12-13 17:05:36,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 112.36363636363636) internal successors, (3708), 33 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:36,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:05:36,539 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:05:36,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-12-13 17:05:36,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:05:36,740 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:05:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:05:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2096383064, now seen corresponding path program 6 times [2022-12-13 17:05:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:05:36,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101373421] [2022-12-13 17:05:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:05:36,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:05:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:05:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:05:37,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:05:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101373421] [2022-12-13 17:05:37,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101373421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:05:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305081764] [2022-12-13 17:05:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:05:37,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:05:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:05:37,275 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:05:37,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 17:05:37,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:05:37,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:05:37,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:05:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:05:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:05:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:05:37,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:05:37,605 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 23 [2022-12-13 17:05:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:05:37,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305081764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:05:37,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:05:37,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 20 [2022-12-13 17:05:37,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307693401] [2022-12-13 17:05:37,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:05:37,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 17:05:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:05:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 17:05:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:05:38,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 324 [2022-12-13 17:05:38,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 3082 transitions, 80560 flow. Second operand has 22 states, 22 states have (on average 122.5909090909091) internal successors, (2697), 22 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:38,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:05:38,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 324 [2022-12-13 17:05:38,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:05:53,438 INFO L130 PetriNetUnfolder]: 8837/15750 cut-off events. [2022-12-13 17:05:53,439 INFO L131 PetriNetUnfolder]: For 1074136/1074158 co-relation queries the response was YES. [2022-12-13 17:05:53,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222460 conditions, 15750 events. 8837/15750 cut-off events. For 1074136/1074158 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 129999 event pairs, 593 based on Foata normal form. 72/15694 useless extension candidates. Maximal degree in co-relation 222257. Up to 12085 conditions per place. [2022-12-13 17:05:53,795 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 2154 selfloop transitions, 1085 changer transitions 6/3248 dead transitions. [2022-12-13 17:05:53,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 711 places, 3248 transitions, 90784 flow [2022-12-13 17:05:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:05:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 17:05:53,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3166 transitions. [2022-12-13 17:05:53,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3908641975308642 [2022-12-13 17:05:53,798 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3166 transitions. [2022-12-13 17:05:53,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3166 transitions. [2022-12-13 17:05:53,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:05:53,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3166 transitions. [2022-12-13 17:05:53,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 126.64) internal successors, (3166), 25 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:53,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:53,805 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:05:53,805 INFO L175 Difference]: Start difference. First operand has 695 places, 3082 transitions, 80560 flow. Second operand 25 states and 3166 transitions. [2022-12-13 17:05:53,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 711 places, 3248 transitions, 90784 flow [2022-12-13 17:06:10,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 3248 transitions, 88255 flow, removed 607 selfloop flow, removed 24 redundant places. [2022-12-13 17:06:10,099 INFO L231 Difference]: Finished difference. Result has 687 places, 3155 transitions, 81968 flow [2022-12-13 17:06:10,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=77993, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=81968, PETRI_PLACES=687, PETRI_TRANSITIONS=3155} [2022-12-13 17:06:10,101 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 656 predicate places. [2022-12-13 17:06:10,101 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 3155 transitions, 81968 flow [2022-12-13 17:06:10,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 122.5909090909091) internal successors, (2697), 22 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:10,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:10,101 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:06:10,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-13 17:06:10,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:10,302 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:06:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1206068635, now seen corresponding path program 17 times [2022-12-13 17:06:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:10,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914121755] [2022-12-13 17:06:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:12,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914121755] [2022-12-13 17:06:12,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914121755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:06:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028104974] [2022-12-13 17:06:12,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:06:12,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:12,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:06:12,300 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:06:12,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 17:06:12,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 17:06:12,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:06:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 17:06:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:06:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:06:12,669 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 42 treesize of output 40 [2022-12-13 17:06:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:06:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:06:12,966 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1878 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1878) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset 8)))) 2147483648)) is different from false [2022-12-13 17:06:13,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:06:13,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 174 [2022-12-13 17:06:13,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:06:13,127 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 26 treesize of output 6 [2022-12-13 17:06:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:06:13,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028104974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:06:13,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:06:13,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 34 [2022-12-13 17:06:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194997503] [2022-12-13 17:06:13,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:06:13,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:06:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:06:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1064, Unknown=1, NotChecked=66, Total=1260 [2022-12-13 17:06:13,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 324 [2022-12-13 17:06:13,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 3155 transitions, 81968 flow. Second operand has 36 states, 36 states have (on average 101.25) internal successors, (3645), 36 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:13,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:13,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 324 [2022-12-13 17:06:13,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:06:32,905 INFO L130 PetriNetUnfolder]: 9641/17210 cut-off events. [2022-12-13 17:06:32,905 INFO L131 PetriNetUnfolder]: For 1173217/1173239 co-relation queries the response was YES. [2022-12-13 17:06:33,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239132 conditions, 17210 events. 9641/17210 cut-off events. For 1173217/1173239 co-relation queries the response was YES. Maximal size of possible extension queue 1255. Compared 145074 event pairs, 108 based on Foata normal form. 204/17208 useless extension candidates. Maximal degree in co-relation 238936. Up to 5734 conditions per place. [2022-12-13 17:06:33,218 INFO L137 encePairwiseOnDemand]: 314/324 looper letters, 1276 selfloop transitions, 2187 changer transitions 39/3505 dead transitions. [2022-12-13 17:06:33,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 3505 transitions, 97333 flow [2022-12-13 17:06:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 17:06:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-13 17:06:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4850 transitions. [2022-12-13 17:06:33,223 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3254159957058508 [2022-12-13 17:06:33,223 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4850 transitions. [2022-12-13 17:06:33,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4850 transitions. [2022-12-13 17:06:33,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:06:33,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4850 transitions. [2022-12-13 17:06:33,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 105.43478260869566) internal successors, (4850), 46 states have internal predecessors, (4850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:33,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 324.0) internal successors, (15228), 47 states have internal predecessors, (15228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:33,234 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 324.0) internal successors, (15228), 47 states have internal predecessors, (15228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:33,234 INFO L175 Difference]: Start difference. First operand has 687 places, 3155 transitions, 81968 flow. Second operand 46 states and 4850 transitions. [2022-12-13 17:06:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 3505 transitions, 97333 flow [2022-12-13 17:06:49,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 3505 transitions, 96480 flow, removed 28 selfloop flow, removed 14 redundant places. [2022-12-13 17:06:49,120 INFO L231 Difference]: Finished difference. Result has 721 places, 3204 transitions, 87095 flow [2022-12-13 17:06:49,122 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=81049, PETRI_DIFFERENCE_MINUEND_PLACES=672, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1026, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=87095, PETRI_PLACES=721, PETRI_TRANSITIONS=3204} [2022-12-13 17:06:49,122 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 690 predicate places. [2022-12-13 17:06:49,122 INFO L495 AbstractCegarLoop]: Abstraction has has 721 places, 3204 transitions, 87095 flow [2022-12-13 17:06:49,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 101.25) internal successors, (3645), 36 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:49,122 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:06:49,122 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:06:49,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 17:06:49,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-13 17:06:49,323 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:06:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:06:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1874662683, now seen corresponding path program 4 times [2022-12-13 17:06:49,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:06:49,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517508359] [2022-12-13 17:06:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:06:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:06:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:06:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:06:49,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:06:49,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517508359] [2022-12-13 17:06:49,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517508359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:06:49,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673162314] [2022-12-13 17:06:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:06:49,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:06:49,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:06:49,884 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:06:49,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 17:06:49,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:06:49,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:06:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 17:06:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:06:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:06:50,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:06:50,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:06:50,094 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 22 [2022-12-13 17:06:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:06:50,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673162314] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:06:50,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:06:50,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 16 [2022-12-13 17:06:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795388525] [2022-12-13 17:06:50,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:06:50,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:06:50,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:06:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:06:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:06:51,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 324 [2022-12-13 17:06:51,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 3204 transitions, 87095 flow. Second operand has 18 states, 18 states have (on average 117.61111111111111) internal successors, (2117), 18 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:06:51,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:06:51,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 324 [2022-12-13 17:06:51,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:07:07,640 INFO L130 PetriNetUnfolder]: 9576/17036 cut-off events. [2022-12-13 17:07:07,640 INFO L131 PetriNetUnfolder]: For 1187631/1187653 co-relation queries the response was YES. [2022-12-13 17:07:07,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244113 conditions, 17036 events. 9576/17036 cut-off events. For 1187631/1187653 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 142213 event pairs, 1230 based on Foata normal form. 44/16878 useless extension candidates. Maximal degree in co-relation 243916. Up to 16404 conditions per place. [2022-12-13 17:07:07,982 INFO L137 encePairwiseOnDemand]: 316/324 looper letters, 3011 selfloop transitions, 201 changer transitions 26/3241 dead transitions. [2022-12-13 17:07:07,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 3241 transitions, 94427 flow [2022-12-13 17:07:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:07:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 17:07:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3009 transitions. [2022-12-13 17:07:07,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37148148148148147 [2022-12-13 17:07:07,985 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3009 transitions. [2022-12-13 17:07:07,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3009 transitions. [2022-12-13 17:07:07,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:07:07,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3009 transitions. [2022-12-13 17:07:07,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 120.36) internal successors, (3009), 25 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:07,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:07,992 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 324.0) internal successors, (8424), 26 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:07,992 INFO L175 Difference]: Start difference. First operand has 721 places, 3204 transitions, 87095 flow. Second operand 25 states and 3009 transitions. [2022-12-13 17:07:07,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 3241 transitions, 94427 flow [2022-12-13 17:07:26,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 3241 transitions, 92954 flow, removed 345 selfloop flow, removed 33 redundant places. [2022-12-13 17:07:26,481 INFO L231 Difference]: Finished difference. Result has 693 places, 3179 transitions, 85394 flow [2022-12-13 17:07:26,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=85492, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2998, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=85394, PETRI_PLACES=693, PETRI_TRANSITIONS=3179} [2022-12-13 17:07:26,484 INFO L288 CegarLoopForPetriNet]: 31 programPoint places, 662 predicate places. [2022-12-13 17:07:26,484 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 3179 transitions, 85394 flow [2022-12-13 17:07:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 117.61111111111111) internal successors, (2117), 18 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:26,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:07:26,485 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:07:26,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-13 17:07:26,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 17:07:26,685 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2022-12-13 17:07:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:07:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1147615328, now seen corresponding path program 18 times [2022-12-13 17:07:26,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:07:26,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409814192] [2022-12-13 17:07:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:07:26,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:07:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:07:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:27,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:07:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409814192] [2022-12-13 17:07:27,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409814192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:07:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893950965] [2022-12-13 17:07:27,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:07:27,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:07:27,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:07:27,373 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:07:27,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766f7914-fb3f-4c7b-9f25-90b308ab3d58/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 17:07:27,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 17:07:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:07:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 17:07:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:07:27,550 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 16 treesize of output 12 [2022-12-13 17:07:27,577 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 [2022-12-13 17:07:27,611 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 [2022-12-13 17:07:27,638 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 [2022-12-13 17:07:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:27,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:07:28,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:07:28,760 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 2 case distinctions, treesize of input 226 treesize of output 131 [2022-12-13 17:07:28,857 INFO L321 Elim1Store]: treesize reduction 38, result has 74.1 percent of original size [2022-12-13 17:07:28,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 760 treesize of output 766 [2022-12-13 17:07:28,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:07:28,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:07:28,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 17:07:28,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:07:28,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 540 treesize of output 570 [2022-12-13 17:07:29,020 INFO L321 Elim1Store]: treesize reduction 38, result has 74.1 percent of original size [2022-12-13 17:07:29,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 580 treesize of output 532 [2022-12-13 17:07:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:07:38,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893950965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:07:38,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:07:38,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2022-12-13 17:07:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070520165] [2022-12-13 17:07:38,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:07:38,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 17:07:38,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:07:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 17:07:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1134, Unknown=3, NotChecked=0, Total=1332 [2022-12-13 17:07:40,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 324 [2022-12-13 17:07:40,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 3179 transitions, 85394 flow. Second operand has 37 states, 37 states have (on average 98.21621621621621) internal successors, (3634), 37 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:40,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:07:40,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 324 [2022-12-13 17:07:40,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:07:43,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 17:07:59,415 INFO L130 PetriNetUnfolder]: 9515/16868 cut-off events. [2022-12-13 17:07:59,415 INFO L131 PetriNetUnfolder]: For 1160519/1160541 co-relation queries the response was YES. [2022-12-13 17:07:59,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238738 conditions, 16868 events. 9515/16868 cut-off events. For 1160519/1160541 co-relation queries the response was YES. Maximal size of possible extension queue 1218. Compared 139953 event pairs, 2407 based on Foata normal form. 8/16774 useless extension candidates. Maximal degree in co-relation 238546. Up to 16701 conditions per place. [2022-12-13 17:07:59,745 INFO L137 encePairwiseOnDemand]: 315/324 looper letters, 3090 selfloop transitions, 100 changer transitions 13/3206 dead transitions. [2022-12-13 17:07:59,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 3206 transitions, 92798 flow [2022-12-13 17:07:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 17:07:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 17:07:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3085 transitions. [2022-12-13 17:07:59,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3071485463958582 [2022-12-13 17:07:59,748 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3085 transitions. [2022-12-13 17:07:59,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3085 transitions. [2022-12-13 17:07:59,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:07:59,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3085 transitions. [2022-12-13 17:07:59,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.51612903225806) internal successors, (3085), 31 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:59,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:59,755 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 324.0) internal successors, (10368), 32 states have internal predecessors, (10368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:07:59,755 INFO L175 Difference]: Start difference. First operand has 693 places, 3179 transitions, 85394 flow. Second operand 31 states and 3085 transitions. [2022-12-13 17:07:59,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 3206 transitions, 92798 flow